Smoke-Free School Policy and Exposure to Secondhand Smoke: A Quasi-Experimental Analysis.

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Azagba, Sunday; Kennedy, Ryan David; Baskerville, Neill Bruce

2016-02-01

Tobacco control prevention efforts are important to protect people from exposure to dangerous tobacco smoke, support cessation, and reduce tobacco-use initiation. While smoke-free laws have been a widespread tobacco control strategy, little work has been done to examine the impact of smoke-free school policies. The objective of this study is to evaluate the impact of provincial smoke-free school ground policies on youth-reported exposure to secondhand smoke (SHS) on school property. This study used a nationally representative sample of 20 388 youth aged 15-18 from the 2005-2012 Canadian Tobacco Use Monitoring Survey. A quasi-experimental design was used to evaluate the impact of smoke-free school policies on SHS exposure. Approximately over half (52%) of respondents reported SHS exposure on a school property in the past month. Smoke-free school policy had a statistically significant effect on SHS exposure. Specifically, the adoption of smoke-free school reduced the probability of SHS exposure by about 8 percentage points. Respondents who were smokers were more likely to report being exposed to SHS than nonsmokers. Likewise, those living in urban areas had higher probability of being exposed to SHS than those living in rural parts of Canada. Reported exposure to tobacco smoke did decrease after the introduction of smoke-free ground policies; however, almost half of high-school aged youth report exposure in the last month. Across Canada, provincial health authorities as well as school administers may need to assess the implementation of these smoke-free policies and improve enforcement strategies to further reduce exposure to dangerous SHS. © The Author 2015. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco.

Quasi-experimental study designs series-paper 4: uses and value.

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Bärnighausen, Till; Tugwell, Peter; Røttingen, John-Arne; Shemilt, Ian; Rockers, Peter; Geldsetzer, Pascal; Lavis, John; Grimshaw, Jeremy; Daniels, Karen; Brown, Annette; Bor, Jacob; Tanner, Jeffery; Rashidian, Arash; Barreto, Mauricio; Vollmer, Sebastian; Atun, Rifat

2017-09-01

Quasi-experimental studies are increasingly used to establish causal relationships in epidemiology and health systems research. Quasi-experimental studies offer important opportunities to increase and improve evidence on causal effects: (1) they can generate causal evidence when randomized controlled trials are impossible; (2) they typically generate causal evidence with a high degree of external validity; (3) they avoid the threats to internal validity that arise when participants in nonblinded experiments change their behavior in response to the experimental assignment to either intervention or control arm (such as compensatory rivalry or resentful demoralization); (4) they are often well suited to generate causal evidence on long-term health outcomes of an intervention, as well as nonhealth outcomes such as economic and social consequences; and (5) they can often generate evidence faster and at lower cost than experiments and other intervention studies. Copyright © 2017 Elsevier Inc. All rights reserved.

Effectiveness of a universal school-based programme for preventing depression in Chinese adolescents: a quasi-experimental pilot study.

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Wong, Paul W C; Fu, King-Wa; Chan, Kim Y K; Chan, Wincy S C; Liu, Patricia M Y; Law, Yik-Wa; Yip, Paul S F

2012-12-15

Evidence of the effectiveness, rather than efficacy, of universal school-based programmes for preventing depression among adolescents is limited. This study examined the effectiveness of a universal depression prevention programme, "The Little Prince is Depressed" (LPD), which adopted the cognitive-behavioural model and aimed to reduce depressive symptoms and enhance protective factors of depression among secondary school students in Hong Kong. A quasi-experimental design was adopted for this pilot study. Thirteen classes were assigned to the intervention or control conditions according to the deliberation of the programme administrator of the four participating schools. Implementation was carried out in two phases, with a professional-led first phase and teacher-led programme second phase. LPD consisted of a 12-week school-based face-to-face programme with psycho-educational lessons and homework assignments. Students completed the programme generally showed positive development in help-seeking attitudes and self-esteem. For students who had more depressive symptoms at pre-assessment, the programme was found to be significant in enhancing cognitive-restructuring skills and support-seeking behaviours. The programme was not, however, found to be statistically significant in reducing depressive symptoms of the participants over the study period. A small sample size, a high attrition rate, and a short follow-up time frame. The LPD programme was successful in building resilience of the students in general and enhancing the cognitive-behavioural skills of students with depressive symptoms. While we did not find sufficient evidence for concluding that the LPD was effective in reducing depressive symptoms, we believe that these results highlight the challenges of implementing evidence-based practices generated from highly controlled environments in real-life settings. Copyright © 2012 Elsevier B.V. All rights reserved.

Comprehension and Motivation Levels in Conjunction with the Use of eBooks with Audio: A Quasi-Experimental Study of Post-Secondary Remedial Reading Students

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Wheeler, Kimberly W.

2014-01-01

This quasi-experimental pretest, posttest nonequivalent control group study investigated the comprehension scores and motivation levels of post-secondary remedial reading students in a two-year technical college in Northwest Georgia using an eBook, an eBook with audio, and a print book. After reading a module on Purpose and Tone in the three book…

Quasi-experimental study designs series-paper 1: introduction: two historical lineages.

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Bärnighausen, Till; Røttingen, John-Arne; Rockers, Peter; Shemilt, Ian; Tugwell, Peter

2017-09-01

The objective of this study was to contrast the historical development of experiments and quasi-experiments and provide the motivation for a journal series on quasi-experimental designs in health research. A short historical narrative, with concrete examples, and arguments based on an understanding of the practice of health research and evidence synthesis. Health research has played a key role in developing today's gold standard for causal inference-the randomized controlled multiply blinded trial. Historically, allocation approaches developed from convenience and purposive allocation to alternate and, finally, to random allocation. This development was motivated both by concerns for manipulation in allocation as well as statistical and theoretical developments demonstrating the power of randomization in creating counterfactuals for causal inference. In contrast to the sequential development of experiments, quasi-experiments originated at very different points in time, from very different scientific perspectives, and with frequent and long interruptions in their methodological development. Health researchers have only recently started to recognize the value of quasi-experiments for generating novel insights on causal relationships. While quasi-experiments are unlikely to replace experiments in generating the efficacy and safety evidence required for clinical guidelines and regulatory approval of medical technologies, quasi-experiments can play an important role in establishing the effectiveness of health care practice, programs, and policies. The papers in this series describe and discuss a range of important issues in utilizing quasi-experimental designs for primary research and quasi-experimental results for evidence synthesis. Copyright © 2017 Elsevier Inc. All rights reserved.

Research Methods in Healthcare Epidemiology and Antimicrobial Stewardship-Quasi-Experimental Designs.

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Schweizer, Marin L; Braun, Barbara I; Milstone, Aaron M

2016-10-01

Quasi-experimental studies evaluate the association between an intervention and an outcome using experiments in which the intervention is not randomly assigned. Quasi-experimental studies are often used to evaluate rapid responses to outbreaks or other patient safety problems requiring prompt, nonrandomized interventions. Quasi-experimental studies can be categorized into 3 major types: interrupted time-series designs, designs with control groups, and designs without control groups. This methods paper highlights key considerations for quasi-experimental studies in healthcare epidemiology and antimicrobial stewardship, including study design and analytic approaches to avoid selection bias and other common pitfalls of quasi-experimental studies. Infect Control Hosp Epidemiol 2016;1-6.

Research Methods in Healthcare Epidemiology and Antimicrobial Stewardship – Quasi-Experimental Designs

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Schweizer, Marin L.; Braun, Barbara I.; Milstone, Aaron M.

2016-01-01

Quasi-experimental studies evaluate the association between an intervention and an outcome using experiments in which the intervention is not randomly assigned. Quasi-experimental studies are often used to evaluate rapid responses to outbreaks or other patient safety problems requiring prompt non-randomized interventions. Quasi-experimental studies can be categorized into three major types: interrupted time series designs, designs with control groups, and designs without control groups. This methods paper highlights key considerations for quasi-experimental studies in healthcare epidemiology and antimicrobial stewardship including study design and analytic approaches to avoid selection bias and other common pitfalls of quasi-experimental studies. PMID:27267457

Does the Incredible Years Teacher Classroom Management Training programme have positive effects for young children exhibiting severe externalizing problems in school?: a quasi-experimental pre-post study.

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Kirkhaug, Bente; Drugli, May Britt; Handegård, Bjørn Helge; Lydersen, Stian; Åsheim, Merethe; Fossum, Sturla

2016-10-26

Young children exhibiting severe externalizing problems in school are at risk of developing several poor outcomes. School-based intervention programs have been found to be effective for students with different problems, including those with behavioral problems, emotional distress, or social problems. The present study investigated whether the IY-TCM programme, as a universal stand-alone school intervention programme, reduced severe child externalizing problems as reported by the teacher, and evaluated if these children improved their social competence, internalizing problems, academic performances and student- teacher relationship as a result of the IY TCM training. A quasi-experimental pre-post study was conducted, including 21 intervention schools and 22 control schools. Children in 1 st - 3 rd grade (age 6-8 years) assessed by their teacher as having severe externalizing problems on the Sutter-Eyberg Student Behavior Inventory-Revised (SESBI-R) total Intensity score, were included in the study, N = 83 (65 boys and 18 girls). Treatment effects were evaluated using 3- level linear mixed models analysis. In our study we found no differences in change between the two conditions from baseline to follow-up in externalizing problems, social skills, internalizing problems and closeness with teacher. The intervention condition did however show advantageous development in terms of student-teacher conflicts and increased academic performances. The IY Teacher Classroom Management program is not sufficient being a stand-alone universal program in a Norwegian primary school setting, for students with severe externalizing problems. However; some important secondary findings were found. Still, young school children with severe externalizing problems are in need of more comprehensive and tailored interventions.

Does the Incredible Years Teacher Classroom Management Training programme have positive effects for young children exhibiting severe externalizing problems in school?: a quasi-experimental pre-post study

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Bente Kirkhaug

2016-10-01

Full Text Available Abstract Background Young children exhibiting severe externalizing problems in school are at risk of developing several poor outcomes. School-based intervention programs have been found to be effective for students with different problems, including those with behavioral problems, emotional distress, or social problems. The present study investigated whether the IY-TCM programme, as a universal stand-alone school intervention programme, reduced severe child externalizing problems as reported by the teacher, and evaluated if these children improved their social competence, internalizing problems, academic performances and student- teacher relationship as a result of the IY TCM training. Methods A quasi-experimental pre-post study was conducted, including 21 intervention schools and 22 control schools. Children in 1st – 3rd grade (age 6–8 years assessed by their teacher as having severe externalizing problems on the Sutter–Eyberg Student Behavior Inventory-Revised (SESBI-R total Intensity score, were included in the study, N = 83 (65 boys and 18 girls. Treatment effects were evaluated using 3- level linear mixed models analysis. Results In our study we found no differences in change between the two conditions from baseline to follow-up in externalizing problems, social skills, internalizing problems and closeness with teacher. The intervention condition did however show advantageous development in terms of student-teacher conflicts and increased academic performances. Conclusion The IY Teacher Classroom Management program is not sufficient being a stand-alone universal program in a Norwegian primary school setting, for students with severe externalizing problems. However; some important secondary findings were found. Still, young school children with severe externalizing problems are in need of more comprehensive and tailored interventions.

Effect of the Dutch school-based education programme 'Taste Lessons' on behavioural determinants of taste acceptance and healthy eating: a quasi-experimental study.

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Battjes-Fries, Marieke C E; Haveman-Nies, Annemien; Renes, Reint-Jan; Meester, Hante J; van 't Veer, Pieter

2015-08-01

To assess the effect of the Dutch school-based education programme 'Taste Lessons' on children's behavioural determinants towards tasting unfamiliar foods and eating healthy and a variety of foods. In a quasi-experimental study design, data on behavioural determinants were collected at baseline, four weeks and six months after the intervention in both the intervention and control group. Children completed consecutively three questionnaires in which knowledge, awareness, skills, attitude, emotion, subjective norm and intention towards the two target behaviours were assessed. Teachers implemented on average a third of the programme activities. Multilevel regression analyses were conducted to compare individual changes in the determinants in the intervention group with those in the control group, corrected for children's gender and age. Effect sizes were expressed as Cohen's d. Dutch elementary schools. Forty-nine classes (1183 children, 9-12 years old) in grades 5-8 of twenty-one elementary schools. The intervention group showed a higher increase in knowledge (d=0·26, Peating healthy and a variety of foods. Full and repeated implementation of Taste Lessons in subsequent years might result in larger effects.

Quasi-Experiments in Schools: The Case for Historical Cohort Control Groups

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Walser, Tamara M.

2014-01-01

There is increased emphasis on using experimental and quasi-experimental methods to evaluate educational programs; however, educational evaluators and school leaders are often faced with challenges when implementing such designs in educational settings. Use of a historical cohort control group design provides a viable option for conducting…

Quasi-Experimental Designs for Causal Inference

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Kim, Yongnam; Steiner, Peter

2016-01-01

When randomized experiments are infeasible, quasi-experimental designs can be exploited to evaluate causal treatment effects. The strongest quasi-experimental designs for causal inference are regression discontinuity designs, instrumental variable designs, matching and propensity score designs, and comparative interrupted time series designs. This…

Quasi-Experimental Approaches to Evaluating the Impact of Air Pollution on Children’s Health

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Heep, Samantha; Neidell, Matthew

2016-01-01

Many studies have shown a correlation between air pollution and poor children’s health. This paper focuses on recent studies that employ quasi-experimental designs in an effort to minimize the effect of confounding factors. These studies are complementary to studies using other designs and confirm that reducing air pollution reduces infant mortality, low birth weight, prematurity, congenital anomalies, asthma hospitalizations, and school absences. These results suggest that lowering the thresholds for acceptable air pollution levels may be prudent, as research has consistently found that some pollutants have negative impacts even at levels below current regulatory thresholds. Policy makers should also consider providing more information to pregnant women and families about when and where the risk of pollution exposure is highest so that they can employ avoidance behavior. PMID:22147868

Reflections on Critical Thinking: Lessons from a Quasi-Experimental Study

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Grussendorf, Jeannie; Rogol, Natalie C.

2018-01-01

In a pre/post quasi-experimental study assessing the impact of a specific curriculum on critical thinking, the authors employed a critical thinking curriculum in two sections of a U.S. foreign policy class. The authors found that the interactive and scaffolded critical thinking curriculum yielded statistically significant critical thinking…

Quasi-experimental Studies in the Fields of Infection Control and Antibiotic Resistance, Ten Years Later: A Systematic Review.

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Alsaggaf, Rotana; O'Hara, Lyndsay M; Stafford, Kristen A; Leekha, Surbhi; Harris, Anthony D

2018-02-01

OBJECTIVE A systematic review of quasi-experimental studies in the field of infectious diseases was published in 2005. The aim of this study was to assess improvements in the design and reporting of quasi-experiments 10 years after the initial review. We also aimed to report the statistical methods used to analyze quasi-experimental data. DESIGN Systematic review of articles published from January 1, 2013, to December 31, 2014, in 4 major infectious disease journals. METHODS Quasi-experimental studies focused on infection control and antibiotic resistance were identified and classified based on 4 criteria: (1) type of quasi-experimental design used, (2) justification of the use of the design, (3) use of correct nomenclature to describe the design, and (4) statistical methods used. RESULTS Of 2,600 articles, 173 (7%) featured a quasi-experimental design, compared to 73 of 2,320 articles (3%) in the previous review (Pquasi-experimental design; and 68 (39%) identified their design using the correct nomenclature. In addition, 2-group statistical tests were used in 75 studies (43%); 58 studies (34%) used standard regression analysis; 18 (10%) used segmented regression analysis; 7 (4%) used standard time-series analysis; 5 (3%) used segmented time-series analysis; and 10 (6%) did not utilize statistical methods for comparisons. CONCLUSIONS While some progress occurred over the decade, it is crucial to continue improving the design and reporting of quasi-experimental studies in the fields of infection control and antibiotic resistance to better evaluate the effectiveness of important interventions. Infect Control Hosp Epidemiol 2018;39:170-176.

Quasi-experimental study designs series-paper 7: assessing the assumptions.

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Bärnighausen, Till; Oldenburg, Catherine; Tugwell, Peter; Bommer, Christian; Ebert, Cara; Barreto, Mauricio; Djimeu, Eric; Haber, Noah; Waddington, Hugh; Rockers, Peter; Sianesi, Barbara; Bor, Jacob; Fink, Günther; Valentine, Jeffrey; Tanner, Jeffrey; Stanley, Tom; Sierra, Eduardo; Tchetgen, Eric Tchetgen; Atun, Rifat; Vollmer, Sebastian

2017-09-01

Quasi-experimental designs are gaining popularity in epidemiology and health systems research-in particular for the evaluation of health care practice, programs, and policy-because they allow strong causal inferences without randomized controlled experiments. We describe the concepts underlying five important quasi-experimental designs: Instrumental Variables, Regression Discontinuity, Interrupted Time Series, Fixed Effects, and Difference-in-Differences designs. We illustrate each of the designs with an example from health research. We then describe the assumptions required for each of the designs to ensure valid causal inference and discuss the tests available to examine the assumptions. Copyright © 2017 Elsevier Inc. All rights reserved.

Quasi-experimental study designs series-paper 8: identifying quasi-experimental studies to inform systematic reviews.

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Glanville, Julie; Eyers, John; Jones, Andrew M; Shemilt, Ian; Wang, Grace; Johansen, Marit; Fiander, Michelle; Rothstein, Hannah

2017-09-01

This article reviews the available evidence and guidance on methods to identify reports of quasi-experimental (QE) studies to inform systematic reviews of health care, public health, international development, education, crime and justice, and social welfare. Research, guidance, and examples of search strategies were identified by searching a range of databases, key guidance documents, selected reviews, conference proceedings, and personal communication. Current practice and research evidence were summarized. Four thousand nine hundred twenty-four records were retrieved by database searches, and additional documents were obtained by other searches. QE studies are challenging to identify efficiently because they have no standardized nomenclature and may be indexed in various ways. Reliable search filters are not available. There is a lack of specific resources devoted to collecting QE studies and little evidence on where best to search. Searches to identify QE studies should search a range of resources and, until indexing improves, use strategies that focus on the topic rather than the study design. Better definitions, better indexing in databases, prospective registers, and reporting guidance are required to improve the retrieval of QE studies and promote systematic reviews of what works based on the evidence from such studies. Copyright © 2017 Elsevier Inc. All rights reserved.

Evaluating the Cooperative Component in Cooperative Learning: A Quasi-Experimental Study

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Emerson, Tisha L. N.; English, Linda K.; McGoldrick, KimMarie

2015-01-01

In this study, the authors employed a quasi-experimental research design to examine the efficacy of a cooperative learning pedagogy (i.e., think-pair-share exercises) integrated into sections of microeconomic principles. Materials, exercises, and assessment instruments for all study sections are identical except for the nature of the…

Adding a Social Marketing Campaign to a School-Based Nutrition Education Program Improves Children's Dietary Intake: A Quasi-Experimental Study.

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Blitstein, Jonathan L; Cates, Sheryl C; Hersey, James; Montgomery, Doris; Shelley, Mack; Hradek, Christine; Kosa, Katherine; Bell, Loren; Long, Valerie; Williams, Pamela A; Olson, Sara; Singh, Anita

2016-08-01

Evidence supports the use of social marketing campaigns to improve nutrition knowledge and reinforce the effects of nutrition education programs. However, the additional effects of parent-focused social marketing with nutrition education have received little attention. Our aim was to assess the impact of the Iowa Nutrition Network's school-based nutrition education program (Building and Strengthening Iowa Community Support for Nutrition and Physical Activity [BASICS]) and the benefits of adding a multichannel social marketing intervention (BASICS Plus) to increase parent-directed communication. A quasi-experimental design with three study conditions compared a school-based nutrition education program (BASICS) with a school-based and social marketing intervention (BASICS Plus) and a no-treatment comparison group. The study included 1,037 third-grade students attending 33 elementary schools and their parents. Measures included parents' reports of their children's in-home consumption of fruits and vegetables (F/V) and use of low-fat/fat-free milk. Data on F/V were collected using a modified version of the University of California Cooperative Extension Food Behavior Checklist; and data on milk use were collected using two questions from the National Health and Nutrition Examination Survey. Multilevel, mixed-effect regression models that account for correlation within repeated measures and children within school were used to compare the mean change over time in the outcome variable for one study group with the mean change over time for another study group. Children in BASICS increased mean consumption of fruit by 0.16 cups (P=0.04) compared with children in the comparison group. Children in BASICS Plus increased mean consumption of fruit by 0.17 cups (P=0.03) and mean consumption of vegetables by 0.13 cups (P=0.02). Children in BASICS Plus were 1.3 times (P=0.05) more likely to use low-fat/fat-free milk than children in either the BASICS group or the comparison group

Quasi-experimental study designs series-paper 6: risk of bias assessment.

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Waddington, Hugh; Aloe, Ariel M; Becker, Betsy Jane; Djimeu, Eric W; Hombrados, Jorge Garcia; Tugwell, Peter; Wells, George; Reeves, Barney

2017-09-01

Rigorous and transparent bias assessment is a core component of high-quality systematic reviews. We assess modifications to existing risk of bias approaches to incorporate rigorous quasi-experimental approaches with selection on unobservables. These are nonrandomized studies using design-based approaches to control for unobservable sources of confounding such as difference studies, instrumental variables, interrupted time series, natural experiments, and regression-discontinuity designs. We review existing risk of bias tools. Drawing on these tools, we present domains of bias and suggest directions for evaluation questions. The review suggests that existing risk of bias tools provide, to different degrees, incomplete transparent criteria to assess the validity of these designs. The paper then presents an approach to evaluating the internal validity of quasi-experiments with selection on unobservables. We conclude that tools for nonrandomized studies of interventions need to be further developed to incorporate evaluation questions for quasi-experiments with selection on unobservables. Copyright © 2017 Elsevier Inc. All rights reserved.

A Quasi-Experimental Control Group Design Study to Determine the Effect of Integrating Character Education into a High School Social Studies Curriculum through Storytelling

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Long, Russell L.

2014-01-01

The purpose of this study was to offer evidence for the development of student character through the integration of historical storytelling into a social studies classroom. A quasi-experimental study was conducted to determine the effect of character education through historical storytelling integrated into a United States history curriculum on…

Are children participating in a quasi-experimental education outside the classroom intervention more physically active?

DEFF Research Database (Denmark)

Schneller, Mikkel Bo; Duncan, Scott; Schipperijn, Jasper

2017-01-01

Background: Education outside the classroom (EOtC) is a curriculum-based approach to teaching that has shown positive associations with children's physical activity and academic learning in small-scale case studies. The purpose of this large-scale quasi-experimental study was to determine...... being spent moderately and vigorously physically active. No differences were observed for girls. Implementing EOtC into schools' weekly practice can be a time- and cost-neutral, supplementary way to increase time spent in PA for boys through grades three to six. Trial registration: The Scientific...... if children who participate regularly in EOtC spend more time being physically active than children who do not. Methods: In the 2014/2015 study TEACHOUT, classes were recruited in pairs such that each EOtC class had a non-EOtC comparison class at the same school and grade level. Participants in 17 EOt...

Social networking versus facebook advertising to recruit survey respondents: a quasi-experimental study.

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Gilligan, Conor; Kypri, Kypros; Bourke, Jesse

2014-09-17

Increasingly, social contact and knowledge of other people's attitudes and behavior are mediated by online social media such as Facebook. The main research to which this recruitment study pertains investigates the influence of parents on adolescent alcohol consumption. Given the pervasiveness of online social media use, Facebook may be an effective means of recruitment and intervention delivery. The objective of the study was to determine the efficacy of study recruitment via social networks versus paid advertising on Facebook. We conducted a quasi-experimental sequential trial with response rate as the outcome, and estimates of cost-effectiveness. The target population was parents of 13-17 year old children attending high schools in the Hunter region of New South Wales, Australia. Recruitment occurred via: method (1) social recruitment using Facebook, email-based, social networks, and media coverage followed by method (2) Facebook advertising. Using a range of online and other social network approaches only: method (1) 74 parents were recruited to complete a survey over eight months, costing AUD58.70 per completed survey. After Facebook advertising: method (2) 204 parents completed the survey over four weeks, costing AUD5.94 per completed survey. Participants were representative of the parents recruited from the region's schools using standard mail and email. Facebook advertising is a cost-effective means of recruiting parents, a group difficult to reach by other methods.

Interactive Whiteboard Technologies in High School: A Comparison of Their Impact on the Levels of Measure That Determine a Return on Investment

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Schipper, Joseph M.; Yocum, Russell G.

2016-01-01

This quantitative, quasi-experimental, nonequivalent group study examined the impact on levels of measure that determine a return on investment of differing forms of interactive whiteboard (IWB) technology used at a high school in a suburban school district in southeastern Virginia. Three forms of IWB were compared: a full-screen IWB, a mobile…

Together We STRIDE: A quasi-experimental trial testing the effectiveness of a multi-level obesity intervention for Hispanic children in rural communities.

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Ko, Linda K; Rillamas-Sun, Eileen; Bishop, Sonia; Cisneros, Oralia; Holte, Sarah; Thompson, Beti

2018-04-01

Hispanic children are disproportionally overweight and obese compared to their non-Hispanic white counterparts in the US. Community-wide, multi-level interventions have been successful to promote healthier nutrition, increased physical activity (PA), and weight loss. Using community-based participatory approach (CBPR) that engages community members in rural Hispanic communities is a promising way to promote behavior change, and ultimately weight loss among Hispanic children. Led by a community-academic partnership, the Together We STRIDE (Strategizing Together Relevant Interventions for Diet and Exercise) aims to test the effectiveness of a community-wide, multi-level intervention to promote healthier diets, increased PA, and weight loss among Hispanic children. The Together We STRIDE is a parallel quasi-experimental trial with a goal of recruiting 900 children aged 8-12 years nested within two communities (one intervention and one comparison). Children will be recruited from their respective elementary schools. Components of the 2-year multi-level intervention include comic books (individual-level), multi-generational nutrition and PA classes (family-level), teacher-led PA breaks and media literacy education (school-level), family nights, a farmer's market and a community PA event (known as ciclovia) at the community-level. Children from the comparison community will receive two newsletters. Height and weight measures will be collected from children in both communities at three time points (baseline, 6-months, and 18-months). The Together We STRIDE study aims to promote healthier diet and increased PA to produce healthy weight among Hispanic children. The use of CBPR approach and the engagement of the community will springboard strategies for intervention' sustainability. Clinical Trials Registration Number: NCT02982759 Retrospectively registered. Copyright © 2018 Elsevier Inc. All rights reserved.

Outcomes of an acceptance and commitment therapy-based skills training group for students with high-functioning autism spectrum disorder: a quasi-experimental pilot study.

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Pahnke, Johan; Lundgren, Tobias; Hursti, Timo; Hirvikoski, Tatja

2014-11-01

Autism spectrum disorder is characterized by social impairments and behavioural inflexibility. In this pilot study, the feasibility and outcomes of a 6-week acceptance and commitment therapy-based skills training group were evaluated in a special school setting using a quasi-experimental design (acceptance and commitment therapy/school classes as usual). A total of 28 high-functioning students with autism spectrum disorder (aged 13-21 years) were assessed using self- and teacher-ratings at pre- and post-assessment and 2-month follow-up. All participants completed the skills training, and treatment satisfaction was high. Levels of stress, hyperactivity and emotional distress were reduced in the treatment group. The acceptance and commitment therapy group also reported increased prosocial behaviour. These changes were stable or further improved at the 2-month follow-up. Larger studies are needed to further evaluate the benefits of acceptance and commitment therapy for autism spectrum disorder. © The Author(s) 2013.

An Investigation on Elementary School Students' Level of Math Learning, Using Math E-Books (A Case Study: Pishtazan Computer Primary School, 4th Zone of Tehran

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Arezoo Naseri

2016-11-01

Full Text Available Since the focus on technology exists in all schools and classes, teachers need to know how to apply it in their teaching practices. The use of ICT in education is an undeniable necessity. Since the use of information and communication technology can smooth the paths of teaching-learning process for students, the researchers in this study tried to apply one of the information and communication technology tools, called electronic books (E-books in teaching math. The aim of this study is to examine elementary school students' level of math learning, using math e-books with the focus on teaching multiplication (Case Study: Pishtazan computer primary school, the 4th zone of Tehran. Using a quasi-experimental study, 61 third grade students from two primary schools for girls located in the 4th education zone of Tehran were selected. Math tests were used to collect data. Using T-test for independent samples, the results showed that level of math learning was higher in the students who have been trained with the help of e-book, compared to the students who have been trained through traditional teaching method.

Promoting menstrual health among persian adolescent girls from low socioeconomic backgrounds: a quasi-experimental study.

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Fakhri, Moloud; Hamzehgardeshi, Zeinab; Hajikhani Golchin, Nayereh Azam; Komili, Abdulhay

2012-03-15

Research in the past decade has revealed average to poor menstrual health among many Iranian girls. The present study investigated the effectiveness of a health promotion project on improving menstrual health in adolescent girls in Iran. A quasi-experimental study was conducted to evaluate the effectiveness of the health intervention program. A total of 698 students (study participants and controls) in several schools in Mazandaran province, Iran were included. The project comprised 10 two-hour educational sessions. Educational topics included the significance of adolescence, physical and emotional changes during adolescence, pubertal and menstruation health and premenstrual syndrome. A self-administered questionnaire measuring demographic characteristics, behaviors during menstruation, menstrual patterns, sources of information about menstruation and personal health data was administered. The questionnaire was administered to all participating students after the experimental group received the training. Among the most significant results was the impact of educational sessions on bathing and genital hygiene. A total of 61.6% in the experimental group compared with 49.3% in the control group engaged in usual bathing during menstruation (p = 0.002). Individual health status was significantly statistically correlated with menstrual health. Attitude towards menstruation was also significantly related to menstrual health. The present study confirms that educational interventions, such as the health promotion project in this study, can be quite effective in promoting menstrual health.

Promoting menstrual health among persian adolescent girls from low socioeconomic backgrounds: a quasi-experimental study

Directory of Open Access Journals (Sweden)

Fakhri Moloud

2012-03-01

Full Text Available Abstract Background Research in the past decade has revealed average to poor menstrual health among many Iranian girls. The present study investigated the effectiveness of a health promotion project on improving menstrual health in adolescent girls in Iran. Methods A quasi-experimental study was conducted to evaluate the effectiveness of the health intervention program. A total of 698 students (study participants and controls in several schools in Mazandaran province, Iran were included. The project comprised 10 two-hour educational sessions. Educational topics included the significance of adolescence, physical and emotional changes during adolescence, pubertal and menstruation health and premenstrual syndrome. A self-administered questionnaire measuring demographic characteristics, behaviors during menstruation, menstrual patterns, sources of information about menstruation and personal health data was administered. The questionnaire was administered to all participating students after the experimental group received the training. Results Among the most significant results was the impact of educational sessions on bathing and genital hygiene. A total of 61.6% in the experimental group compared with 49.3% in the control group engaged in usual bathing during menstruation (p = 0.002. Individual health status was significantly statistically correlated with menstrual health. Attitude towards menstruation was also significantly related to menstrual health. Conclusions The present study confirms that educational interventions, such as the health promotion project in this study, can be quite effective in promoting menstrual health.

Social Networking Versus Facebook Advertising to Recruit Survey Respondents: A Quasi-Experimental Study

Science.gov (United States)

Kypri, Kypros; Bourke, Jesse

2014-01-01

Background Increasingly, social contact and knowledge of other people’s attitudes and behavior are mediated by online social media such as Facebook. The main research to which this recruitment study pertains investigates the influence of parents on adolescent alcohol consumption. Given the pervasiveness of online social media use, Facebook may be an effective means of recruitment and intervention delivery. Objective The objective of the study was to determine the efficacy of study recruitment via social networks versus paid advertising on Facebook. Methods We conducted a quasi-experimental sequential trial with response rate as the outcome, and estimates of cost-effectiveness. The target population was parents of 13-17 year old children attending high schools in the Hunter region of New South Wales, Australia. Recruitment occurred via: method (1) social recruitment using Facebook, email-based, social networks, and media coverage followed by method (2) Facebook advertising. Results Using a range of online and other social network approaches only: method (1) 74 parents were recruited to complete a survey over eight months, costing AUD58.70 per completed survey. After Facebook advertising: method (2) 204 parents completed the survey over four weeks, costing AUD5.94 per completed survey. Participants were representative of the parents recruited from the region’s schools using standard mail and email. Conclusions Facebook advertising is a cost-effective means of recruiting parents, a group difficult to reach by other methods. PMID:25230740

The effectiveness of an e-learning course on medication calculation in nursing students: a clustered quasi-experimental study.

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Van Lancker, Aurélie; Baldewijns, Katleen; Verhaeghe, Rik; Robays, Hugo; Buyle, Franky; Colman, Roos; Van Hecke, Ann

2016-09-01

To evaluate the effectiveness of an e-learning course compared with a face-to-face lecture on medication calculation. The current knowledge on medication calculation of nursing students and nurses is insufficient to provide safe care. A stratified-clustered quasi-experimental study. A random selection of nursing schools were allocated to the e-learning course (intervention group) (seven schools; 189 students) or face-to-face lecture (control group) (six schools, 222 students). Students in both groups completed a validated medication calculation test (maximum score: 16) prior to the course (T0), immediately after the course (T1) and 3 months later (T2). A linear mixed model was used for data analysis. Medication calculation skills improved significantly more by the face-to-face lecture than e-learning course. Students in both groups significantly improved in medication calculation skills immediately after the course (T1) and 3 months later. The results flattened at T2 with a significant decline in the intervention group between T1 and T2 and a non-significant decline in the control group. Based on a subgroup analysis, improvement in medication calculation skills at T2 could only be observed in vocational-level (sub degree) nursing students receiving a face-to-face course. Both medication calculation courses had a positive effect on medication calculation skills. Students receiving traditional face-to-face lecture improved significantly more than the students receiving the e-learning course. © 2016 John Wiley & Sons Ltd.

A Quasi-Experimental Study of Moral Reasoning of Undergraduate Business Students Using an Ethical Decision-Making Framework in a Basic Accounting Course

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Wilhelm, William J.; Czyzewski, Alan B.

2006-01-01

This study was designed to identify classroom interventions that can be used by core business course instructors (as opposed to trained business ethicists) to positively affect levels of moral reasoning in undergraduate business students. The quasi-experimental study conducted at a Midwestern university, focused on determining if the utilization…

Comparing the effects of community service and imprisonment on reconviction: results from a quasi-experimental Danish study

DEFF Research Database (Denmark)

Klement, Christian

2015-01-01

Objective This study compares reconviction rates for Danish offenders sentenced to community service and imprisonment. A large general sample of offenders (n = 1602) is examined. Methods The study relies on a quasi-experimental design and uses propensity score matching as well as logistic....... Results Imprisonment is associated with a higher rate of recidivism and the result is statistically significant at conventional statistical levels. Conclusions Community service (CS) compared to imprisonment appears to cause a lower reconviction rate in general. Additional research is needed to shed light...

Journaling: A quasi-experimental study of student nurses’ reflective learning ability

Directory of Open Access Journals (Sweden)

LP Fakude

2003-09-01

Full Text Available The use of journaling or journal writing in clinical education is one of the strategies used to develop critical thinking. Reflective journal writing, as it is commonly known, can nurture many qualities of a critical thinker and promote thoughtful nursing practice. Using a quasi-experimental design in this study, reflective journaling was introduced to a sample of first year Bridging Course student nurses at a Private Nursing Education Institution, to assess its effectiveness in reflective learning.

Effects of peer education intervention on HIV/AIDS related sexual behaviors of secondary school students in Addis Ababa, Ethiopia: a quasi-experimental study.

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Menna, Takele; Ali, Ahmed; Worku, Alemayehu

2015-09-07

Worldwide, about 50% of all new cases of HIV occur in youth between age 15 and 24 years. Studies in various sub-Saharan African countries show that both out of school and in school adolescents and youth are engaged in risky sexual behaviors. School-based health education has been a cornerstone of youth-focused HIV prevention efforts since the early 1990s. In addition, peer-based interventions have become a common method to effect important health-related behavior changes and address the HIV/AIDS pandemic. Thus, the aim of this study was to evaluate efficacy of peer education on changing HIV related risky sexual behaviors among school youth in Addis Ababa, Ethiopia. A quasi experimental study with peer education intervention was conducted in purposively selected four secondary schools (two secondary schools for the intervention and other two for the control group) in Addis Ababa, Ethiopia. Five hundred sixty students from randomly selected sections of grade 11 were assessed through anonymous questionnaires conducted in pre- and post-intervention periods. Pertinent data on socio-demographic and sexual behavior related factors were collected. The statistical packages used for data entry and analysis were epi-info version 3.5.4 and SPSS version 20.0 respectively. Chi-square test and multivariable logistic regressions were used for testing association between peer education intervention and sexual behaviors of students. In addition to testing association between dependent and independent variables, multi-variable analysis was employed to control for the effects of confounding variables. When the pre and post intervention data of each group were compared, comprehensive Knowledge of HIV (P-Values =0.004) and willingness to go for HIV counseling and testing (P-value = 0.01) showed significant differences among intervention group students during post intervention period. Moreover, students in the intervention group were more likely to use condoms during post

Are children participating in a quasi-experimental education outside the classroom intervention more physically active?

DEFF Research Database (Denmark)

Schneller, Mikkel Bo; Duncan, Scott; Schipperijn, Jasper

2017-01-01

to treat' (ITT) approach. The amount of EOtC the participants were exposed to was monitored. Associations between time spent in different physical activity intensities and EOtC group and sex were assessed using generalised linear models adjusted for age. In a second analysis, we modified the sample using......BACKGROUND: Education outside the classroom (EOtC) is a curriculum-based approach to teaching that has shown positive associations with children's physical activity and academic learning in small-scale case studies. The purpose of this large-scale quasi-experimental study was to determine...... if children who participate regularly in EOtC spend more time being physically active than children who do not. METHODS: In the 2014/2015 study TEACHOUT, classes were recruited in pairs such that each EOtC class had a non-EOtC comparison class at the same school and grade level. Participants in 17 EOt...

The effectiveness of ethics education: a quasi-experimental field study.

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May, Douglas R; Luth, Matthew T

2013-06-01

Ethical conduct is the hallmark of excellence in engineering and scientific research, design, and practice. While undergraduate and graduate programs in these areas routinely emphasize ethical conduct, few receive formal ethics training as part of their curricula. The first purpose of this research study was to assess the relative effectiveness of ethics education in enhancing individuals' general knowledge of the responsible conduct of research practices and their level of moral reasoning. Secondly, we examined the effects of ethics education on the positive psychological outcomes of perspective-taking, moral efficacy, moral courage, and moral meaningfulness. To examine our research hypotheses, we utilized a pretest-posttest quasi-experimental design consisting of three ethics education groups (control, embedded modules, and stand-alone courses). Findings revealed that both embedded and stand alone courses were effective in enhancing participants' perspective-taking, moral efficacy, and moral courage. Moral meaningfulness was marginally enhanced for the embedded module condition. Moral judgment and knowledge of responsible conduct of research practices were not influenced by either ethics education condition. Contrary to expectations, stand alone courses were not superior to embedded modules in influencing the positive psychological outcomes investigated. Implications of these findings for future research and practice are discussed.

Effect of Education on Asthma Control in Children: A Quasi- Experimental Study

Directory of Open Access Journals (Sweden)

Arash Kalantari

2017-12-01

Full Text Available Introduction: The prevalence of asthma has increased significantly in recent decades1 especially in lower socioeconomic groups and in minority populations. Because of the increasing prevalence of asthma among children in worldwide and Iran, the importance of timely control of the disease after its diagnosis and few studies on the effect of education on asthma control in Iran, the aim of this study was to investigate the effect of education on asthma control in children. Methods: In this quasi-experimental study, 104 Iranian children (6-14 years old with asthma referred to asthma and allergy clinic of Children's Medical Center in Tehran were studied via convenience sampling method. Recruitment was occurred between 2011 to 2014. Subjects randomly were divided into two equal groups of intervention and control. For intervention group, common education as well as special education in format of booklet, pamphlets, CD and group training sessions were applied every two weeks within the first two months of follow up and every two months then after. While, the control group received usual careResults: The means of FEV1/ FVC change, frequency of admission to the ED, hospitalization and absence from school and use of steroids were significantly different before and after education in the intervention group. While changes among measured parameters in the control group were not significantly different.Conclusion: The results of this study showed that specific education has significant helpful effect on asthma attack control in children.

Enhancing (In)Formal Learning Ties in Interdisciplinary Management Courses: A Quasi-Experimental Social Network Study

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Rienties, Bart; Héliot, YingFei

2018-01-01

While interdisciplinary courses are regarded as a promising method for students to learn and apply knowledge from other disciplines, there is limited empirical evidence available whether interdisciplinary courses can effectively "create" interdisciplinary students. In this innovative quasi-experimental study amongst 377 Master's…

Quasi-experimental study on the effectiveness of a flipped classroom for teaching adult health nursing.

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Park, Esther O; Park, Ji Hyun

2018-04-01

The effectiveness of flipped learning as one of the teaching methods of active learning has been left unexamined in nursing majors, compared to the frequent attempts to uncover the effectiveness of it in other disciplines. The purpose of this study was to reveal the effectiveness of flipped learning pedagogy in an adult health nursing course, controlling for other variables. The study applied a quasi-experimental approach, comparing pre- and post-test results in learning outcomes. Included in this analysis were the records of 81 junior nursing major students. The convenience sampling method was used to select the participants. Those in the experimental group were exposed to a flipped classroom experience that was given after the completion of their traditional class. The students' learning outcomes and the level of critical thinking skills were evaluated before and after the intervention of the flipped classroom. After the flipped classroom experience, the scores of the students' achievement in subject topics and critical thinking skills, specifically intellectual integrity and creativity, showed a greater level of increase than those of their controlled counterparts. This remained true even after controlling for previous academic performance and the level of creativity. This study confirmed the effectiveness of the flipped classroom as a measure of active learning by applying a quantitative approach. But, regarding the significance of the initial contribution of flipped learning in the discipline of nursing science, carrying out a more authentic experimental study could justify the impact of flipped learning pedagogy. © 2017 Japan Academy of Nursing Science.

Sustaining a Global Social Network: a quasi-experimental study.

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Benton, D C; Ferguson, S L

2017-03-01

To examine the longer term impact on the social network of participating nurses in the Global Nursing Leadership Institute (GNLI2013) through using differing frequencies of follow-up to assess impact on maintenance of network cohesion. Social network analysis is increasingly been used by nurse researchers, however, studies tend to use single point-in-time descriptive methods. This study utilizes a repeated measures, block group, control-intervention, quasi-experimental design. Twenty-eight nurse leaders, competitively selected through a double-blind peer review process, were allocated to five action learning-based learning groups. Network architecture, measures of cohesion and node degree frequency were all used to assess programme impact. The programme initiated and sustained connections between nurse leaders drawn from a geographically dispersed heterogeneous group. Modest inputs of two to three e-mails over a 6-month period seem sufficient to maintain connectivity as indicated by measures of network density, diameter and path length. Due to the teaching methodology used, the study sample was relatively small and the follow-up data collection took place after a relatively short time. Replication and further cohort data collection would be advantageous. In an era where many policy solutions are being debated and initiated at the global level, action learning leadership development that utilizes new technology follow-up appears to show significant impact and is worthy of wider application. The approach warrants further inquiry and testing as to its longer term effects on nursing's influence on policy formulation and implementation. © 2016 International Council of Nurses.

Early-Life Nutritional Programming of Type 2 Diabetes: Experimental and Quasi-Experimental Evidence.

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Vaiserman, Alexander M

2017-03-05

Consistent evidence from both experimental and human studies suggest that inadequate nutrition in early life can contribute to risk of developing metabolic disorders including type 2 diabetes (T2D) in adult life. In human populations, most findings supporting a causative relationship between early-life malnutrition and subsequent risk of T2D were obtained from quasi-experimental studies ('natural experiments'). Prenatal and/or early postnatal exposures to famine were demonstrated to be associated with higher risk of T2D in many cohorts around the world. Recent studies have highlighted the importance of epigenetic regulation of gene expression as a possible major contributor to the link between the early-life famine exposure and T2D in adulthood. Findings from these studies suggest that prenatal exposure to the famine may result in induction of persistent epigenetic changes that have adaptive significance in postnatal development but can predispose to metabolic disorders including T2D at the late stages of life. In this review, quasi-experimental data on the developmental programming of T2D are summarized and recent research findings on changes in DNA methylation that mediate these effects are discussed.

The Effectiveness of the "Lions Quest Program: Skills for Growing" on School Climate, Students' Behaviors, Perceptions of School, and Conflict Resolution Skills

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Gol-Guven, Mine

2017-01-01

This study examines the effectiveness of the Lions Quest Program: Skills for Growing by employing a quasi-experimental design with a control group. The experimental and control group each comprises two primary schools--one public, one private. One classroom at each grade level, 1 through 4, in each school was selected by random sampling for a…

Education Against Tobacco (EAT): a quasi-experimental prospective evaluation of a programme for preventing smoking in secondary schools delivered by medical students: a study protocol.

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Brinker, Titus J; Stamm-Balderjahn, Sabine; Seeger, Werner; Groneberg, David A

2014-07-24

A survey conducted by the German Federal Centre for Health Education in 2012 showed that 35.2% of all young adults (18-25 years) and 12.0% of all adolescents (12-17 years) in Germany are regular cigarette smokers. Most smoked their first cigarette in early adolescence. We recently reported a significantly positive short-term effect of a physician-delivered school-based smoking prevention programme on the smoking behaviour of schoolchildren in Germany. However, physician-based programmes are usually very expensive. Therefore, we will evaluate and optimise Education against Tobacco (EAT), a widespread, low-cost programme delivered by about 400 medical students from 16 universities in Germany. A prospective quasi-experimental study design with two measurements at baseline (t1) and 6 months post-intervention (t2) to investigate an intervention in 10-15-year-olds in grades 6-8 at German secondary schools. The intervention programme consists of two 60-min school-based medical-student-delivered modules with (module 1) and without the involvement of patients with tobacco-related diseases and control groups (no intervention). The study questionnaire measuring smoking status (water pipe and cigarette smoking), smoking-related cognitions, and gender, social and cultural aspects was designed and pre-tested in advance. The primary end point is the prevalence of smokers and non-smokers in the two study arms at 6 months after the intervention. The percentage of former smokers and new smokers in the two groups and the measures of smoking behaviour will be studied as secondary outcome measures. In accordance with Good Epidemiologic Practice (GEP) guidelines, the study protocol was submitted for approval by the responsible ethics committee, which decided that the study does not need ethical approval (Goethe University, Frankfurt-Main, Germany). Findings will be disseminated in peer-reviewed journals, at conferences, within our scientific advisory board and through medical

Improvement of Iranian nurses' competence through professional portfolio: a quasi-experimental study.

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Bahreini, Masoud; Moattari, Marzieh; Shahamat, Shohreh; Dobaradaran, Sina; Ravanipour, Mariam

2013-03-01

The aim of the study was to determine the effect of a portfolio-based professional development program on nurses' competence in a university hospital in Iran. A pre-test/post-test, controlled, quasi-experimental design was used. From the university hospital's 18 general wards, four wards were randomly selected. Two wards were randomly allocated as the experimental group (35 subjects) and two wards as the control group (38 subjects). Nurses in the experimental group participated in a 12-month portfolio-based professional development program and nurses in the control group participated in the routine professional development programs of their wards. The data were collected by the Nurse Competence Scale and were analyzed using descriptive statistics and independent and paired t-tests. After intervention, the average nurses' competence in the experimental group increased significantly (P professional portfolio is an effective tool for improving nurses' competence. The professional portfolios help nurses update their knowledge, skills, and competence towards their full role as nurses. © 2012 Wiley Publishing Asia Pty Ltd.

Quasi-Experimental Study of the Effectiveness of an Integrated Service Delivery Network for the Frail Elderly

Science.gov (United States)

Tourigny, Andre; Durand, Pierre J.; Bonin, Lucie; Hebert, Rejean; Rochette, Louis

2004-01-01

The aim of this study was to examine the effectiveness of a new, integrated service delivery (ISD) network of health and social services for frail elderly living in a semi-urban community. A quasi-experimental study was conducted from 1997 to 2000, with measures taken before implementation (T0) and every 12 months after implementation for a 3-year…

Examining Charter School Policy and Public School District Resource Allocation in Ohio

Science.gov (United States)

Linick, Matthew A.

2016-01-01

This project focuses on the competitive pressure, or the threat of competitive pressure, generated by charter school policy. This paper uses longitudinal district-level data and multiple quasi-experimental designs to examine the relationship between two Ohio charter school policies and changes in public school district instructional resource…

Prenatal exposure to maternal smoking and childhood behavioural problems: a quasi-experimental approach.

Science.gov (United States)

McCrory, Cathal; Layte, Richard

2012-11-01

This retrospective cross-sectional paper examines the relationship between maternal smoking during pregnancy and children's behavioural problems at 9 years of age independent of a wide range of possible confounders. The final sample comprised 7,505 nine-year-old school children participating in the first wave of the Growing Up in Ireland study. The children were selected through the Irish national school system using a 2-stage sampling method and were representative of the nine-year population. Information on maternal smoking during pregnancy was obtained retrospectively at 9 years of age via parental recall and children's behavioural problems were assessed using the Strengths and Difficulties Questionnaire across separate parent and teacher-report instruments. A quasi-experimental approach using propensity score matching was used to create treatment (smoking) and control (non-smoking) groups which did not differ significantly in their propensity to smoke in terms of 16 observed characteristics. After matching on the propensity score, children whose mothers smoked during pregnancy were 3.5 % (p parent and teacher-report respectively. Maternal smoking during pregnancy was more strongly associated with externalising than internalising behavioural problems. Analysis of the dose-response relationship showed that the differential between matched treatment and control groups increased with level of maternal smoking. Given that smoking is a modifiable risk factor, the promotion of successful cessation in pregnancy may prevent potentially adverse long-term consequences.

Effectiveness of Psychosocial Interventions in Complex Palliative Care Patients: A Quasi-Experimental, Prospective Multicenter Study.

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Mateo-Ortega, Dolors; Gómez-Batiste, Xavier; Maté, Jorge; Beas, Elba; Ela, Sara; Lasmarias, Cristina; Limonero, Joaquín T

2018-03-13

To determine whether specific psychosocial interventions can ease discomfort in palliative care (PC) patients, particularly in those with high levels of pain or emotional distress. Changes in the psychological parameters of 8333 patients were assessed in a quasi-experimental, prospective, multicenter, single group pretest/post-test study. Psychosocial care was delivered by 29 psychosocial care teams (PSTs; 137 professionals). Pre- and post-intervention changes in these variables were assessed: mood, anxiety, and emotional distress. Patients were classified as complex, when presented with high levels of anxiety, mood, suffering (or perception of time as slow), and distress (or unease, or discomfort), or noncomplex. These groups were compared to assess changes in suffering-related parameters from baseline. Psychosocial interventions reduced patients' suffering. These interventions were more effective in complex patients. After successive psychosocial interventions, the level of suffering in complex patients decreased until close to parity with noncomplex patients, suggesting that patients with major complexity could benefit most from specific psychosocial treatment. These findings support the importance of assessing and treating patients' psychosocial needs.

Efficiency analysis on a two-level three-phase quasi-soft-switching inverter

DEFF Research Database (Denmark)

Geng, Pan; Wu, Weimin; Huang, Min

2013-01-01

When designing an inverter, an engineer often needs to select and predict the efficiency beforehand. For the standard inverters, plenty of researches are analyzing the power losses and also many software tools are being used for efficiency calculation. In this paper, the efficiency calculation...... for non-conventional inverters with special shoot-through state is introduced and illustrated through the analysis on a special two-level three-phase quasi-soft-switching inverter. Efficiency comparison between the classical two-stage two-level three-phase inverter and the two-level three-phase quasi......-soft-switching inverter is carried out. A 10 kW/380 V prototype is constructed to verify the analysis. The experimental results show that the efficiency of the new inverter is higher than that of the traditional two-stage two- level three-phase inverter....

Blended learning pedagogy designed for communication module among undergraduate nursing students: A quasi-experimental study.

Science.gov (United States)

Shorey, Shefaly; Kowitlawakul, Yanika; Devi, M Kamala; Chen, Hui-Chen; Soong, Swee Kit Alan; Ang, Emily

2018-02-01

Effective communication is important for nurse and patient outcomes. Nursing students often feel unprepared to communicate effectively with patients and other healthcare workers within the clinical environment. Blended learning pedagogy-based communication skills training can provide an alternative to traditional methods of teaching to enhance students' satisfaction and self-efficacy levels in communicating with others. To examine the effectiveness of blended learning pedagogy in a redesigned communication module among nursing undergraduates in enhancing their satisfaction levels and attitudes towards learning communication module as well as self-efficacy in communication. A single group pre-test and post-test quasi-experimental design was adopted. Data were collected from August 2016 to November 2016 from 124 nursing undergraduates from a leading nursing school. Blended learning pedagogy was adopted to redesign a communication module that offered a wide array of learning opportunities via face-to-face classroom and online sessions. Validated and reliable instruments were used to measure satisfaction levels with blended learning pedagogy, attitudes towards learning communication, and communication self-efficacy. Descriptive and inferential statistics were used to analyze the data. Participants had enhanced satisfaction levels with blended learning pedagogy, better attitudes in learning communication skills, and improved communication self-efficacies at posttest (week 13 of the semester) when compared with their pre-test scores (week one of the semester). Participants scored higher in the Blended Learning Satisfaction Scale, the Communication Skills Attitude Scale, and the communication skills subscale of the Nursing Students Self-Efficacy Scale. Blended learning pedagogy can be effectively used in facilitating communication modules and enhancing student outcomes among nursing undergraduates. The long-term effectiveness of using blended learning pedagogy in

Managing Legitimacy in the Educational Quasi-Market: A Study of Ethnically Diverse, Inclusive Schools in Flanders

Science.gov (United States)

Mampaey, Jelle; Zanoni, Patrizia

2014-01-01

In this paper, we examine how ethnically diverse, inclusive schools manage their legitimacy in an educational quasi-market. These schools are often threatened with a loss of legitimacy as ethnic majority parents perceive an ethnically diverse student population and radical pedagogical practices as signs of lower quality education. However,…

Ergonomic office design and aging: a quasi-experimental field study of employee reactions to an ergonomics intervention program.

Science.gov (United States)

May, Douglas R; Reed, Kendra; Schwoerer, Catherine E; Potter, Paul

2004-04-01

A naturally occurring quasi-experimental longitudinal field study of 87 municipal employees using pretest and posttest measures investigated the effects of an office workstation ergonomics intervention program on employees' perceptions of their workstation characteristics, levels of persistent pain, eyestrain, and workstation satisfaction. The study examined whether reactions differed between younger and older employees. Results revealed that workstation improvements were associated with enhanced perceptions of the workstation's ergonomic qualities, less upper back pain, and greater workstation satisfaction. Among those experiencing an improvement, the perceptions of workstation ergonomic qualities increased more for younger than older employees, supporting the "impressionable years" framework in the psychological literature on aging. Implications for human resources managers are discussed.

Gender Performance Gaps: Quasi-Experimental Evidence on the Role of Gender Differences in Sleep Cycles

OpenAIRE

Lusher, Lester; Yasenov, Vasil

2016-01-01

Sleep studies suggest that girls go to sleep earlier, are more active in the morning, and cope with sleep deprivation better than boys. We provide the first causal evidence on how gender differences in sleep cycles can help explain the gender performance gap. We exploit over 240,000 assignment-level grades from a quasi-experiment with a community of middle and high schools where students' schedules alternated between morning and afternoon start times each month. Relative to girls, we find tha...

The effects of an integrated care intervention for the frail elderly on informal caregivers: A quasi-experimental study

NARCIS (Netherlands)

B. Janse (Benjamin); R. Huijsman (Robbert); R.D.M. de Kuyper (Ruben Dennis Maurice); I.N. Fabbricotti (Isabelle)

2014-01-01

markdownabstract__Abstract__ Background: This study explored the effects of an integrated care model aimed at the frail elderly on the perceived health, objective burden, subjective burden and quality of life of informal caregivers. Methods. A quasi-experimental design with before/after

A school-based programme for tobacco and alcohol prevention in special education: effectiveness of the modified 'healthy school and drugs' intervention and moderation by school subtype

NARCIS (Netherlands)

Turhan, Abdullah; Onrust, Simone; ten Klooster, Peter M.; Pieterse, Marcel E.

2017-01-01

AIMS: To test the effectiveness of the Healthy School and Drugs (HSD) programme on tobacco and alcohol use in Dutch secondary special education (SE) schools, and whether this depends upon subtypes of SE schools and the level of implementation. DESIGN: In a quasi-experimental design with baseline and

Interprofessional teamwork among students in simulated codes: a quasi-experimental study.

Science.gov (United States)

Garbee, Deborah D; Paige, John; Barrier, Kendra; Kozmenko, Valeriy; Kozmenko, Lyubov; Zamjahn, John; Bonanno, Laura; Cefalu, Jean

2013-01-01

The purpose of this study was to evaluate the efficacy of using crisis resource management (CRM) principles and high-fidelity human patient simulation (HFHPS) for interprofessional (IP) team training of students from undergraduate nursing, nurse anesthesia, medical, and respiratory therapy. IP education using simulation-based training has the potential to transform education by improving teamwork and communication and breaking down silos in education. This one-year study used a quasi-experimental design to evaluate students' acquisition and retention of teamwork and communication skills. A convenience sample consisted of 52 students in the fall semester, with 40 students returning in the spring. Mean scores increased after training, and skills were retained fairly well. Any loss was regained with repeat training in the spring. The results suggest that using CRM and HFHPS is an effective pedagogy for teaching communication and teamwork skills to IP student teams.

Journaling: a quasi-experimental study of student nurses' reflective learning ability.

Science.gov (United States)

Fakude, L P; Bruce, J C

2003-08-01

The use of journaling or journal writing in clinical education is one of the strategies used to develop critical thinking. Reflective journal writing, as it is commonly known, can nurture many qualities of a critical thinker and promote thoughtful nursing practice. Using a quasi-experimental design in this study, reflective journaling was introduced to a sample of first year Bridging Course student nurses at a Private Nursing Education Institution, to assess its effectiveness in reflective learning. The study design enabled comparisons between two groups: one group of students assigned to do journaling (experimental group) and another group of students (control group) who did not journal. The students in the experimental group were given a period of eight weeks to journal their clinical experiences. At the end of this period, both groups were given an exercise, based on a clinical situation, to analyse reflectively and a comparison made on their performance. Descriptive statistics were used to analyse data and Fisher's Exact Test was used to determine the significance of differences observed within and between groups. The results showed that students in the experimental group performed better in exploring alternatives of action (p < 0.10) and formulating responses in similar future situations (p < 0.05) during the process of reflection. There was no significant difference between the groups' scores with regard to their ability to describe the clinical experience, to explore their related feelings, to evaluate the experience and to interpret/create meaning for themselves. Recommendations are made for continued student support and guidance during clinical education if reflection is considered to enhance reflective, thoughtful nursing practice.

A quasi-experimental cross-disciplinary evaluation of the impacts of education outside the classroom on pupils' physical activity, well-being and learning: the TEACHOUT study protocol.

Science.gov (United States)

Nielsen, Glen; Mygind, Erik; Bølling, Mads; Otte, Camilla Roed; Schneller, Mikkel Bo; Schipperijn, Jasper; Ejbye-Ernst, Niels; Bentsen, Peter

2016-10-24

Education Outside the Classroom (EOTC) is a teaching method that aims to promote schoolchildren's learning, physical activity (PA), social relations, motivation, and well-being. EOTC activities are characterized by teachers using the local environment in their teaching, and involve innovative teaching methods, child-led approaches to problem-solving, experimentation, cooperation, PA, and play. EOTC has become common practice for many teachers in Scandinavia; however, only case studies have evaluated its impacts. The TEACHOUT study aims to evaluate the impacts of EOTC on Danish schoolchildren's PA, social relations, motivation, well-being, and learning. TEACHOUT is a quasi-experimental, cross-disciplinary study. Sixteen schools participated, containing 19 EOTC school classes and 19 parallel non-EOTC classes, with a total of 834 children aged 9 to 13 years. Measures of the children's social relations, motivation for school, well-being, and academic performance were collected at the beginning and end of the school year. Data on PA levels were collected over ten-day periods during the school year using accelerometers. The amount and characteristics of the actual EOTC provided in both EOTC and non-EOTC classes were monitored day-to-day throughout the school year, using an online teacher survey platform. The effects of EOTC are mainly analysed by comparing EOTC pupils to non-EOTC (i.e. control) pupils based on their scores on the outcome variables (i.e. school performance, well-being, motivation, and social relations) at the end of the school year, adjusting for the baseline values (from the beginning of the year). The impacts of EOTC on PA are evaluated by comparing the total as well as context-specific amounts of PA of children participating in EOTC to those of children in their parallel non-EOTC classes. Furthermore, the interdependencies between PA, social relations, well-being, motivation, and learning are explored using path analysis. To help describe and

A Quasi-Experimental Study Investigating the Effect of Scent on Students' Memory of Multiplication Facts and Math Anxiety

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Leap, Evelyn M.

2013-01-01

This quasi-experimental study was conducted with two fifth grade classrooms to investigate the effect of scent on students' acquisition and retention of multiplication facts and math anxiety. Forty participants received daily instruction for nine weeks, using a strategy-rich multiplication program called Factivation. Students in the Double Smencil…

Effect of 3basic life support training programs in future primary school teachers. A quasi-experimental design.

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Navarro-Patón, R; Freire-Tellado, M; Basanta-Camiño, S; Barcala-Furelos, R; Arufe-Giraldez, V; Rodriguez-Fernández, J E

2018-05-01

To evaluate the learning of basic life support (BLS) measures on the part of laypersons after 3different teaching programs. A quasi-experimental before-after study involving a non-probabilistic sample without a control group was carried out. Primary school teacher students from the University of Santiago (Spain). A total of 124 students (68.8% women and 31.2% men) aged 20-39 years (M=22.23; SD=3.79), with no previous knowledge of BLS, were studied. Three teaching programs were used: a traditional course, an audio-visual approach and feedback devices. Chest compressions as sole cardiopulmonary resuscitation skill evaluation: average compression depth, compression rate, chest recoil percentage and percentage of correct compressions. Automated external defibrillator: time needed to apply a shock before and after the course. There were significant differences in the results obtained after 2minutes of chest compressions, depending on the training program received, with feedback devices having a clear advantage referred to average compression depth (p<0.001), compression rate (p<0.001), chest recoil percentage (p<0.001) and percentage of correct compressions (p<0.001). Regarding automated external defibrillator, statistically significant differences were found in T after (p=0.025). The teaching course using feedback devices obtained the best results in terms of the quality of chest compressions, followed by the traditional course and audio-visual approach. These favorable results were present in both men and women. All 3teaching methods reached the goal of reducing defibrillation time. Copyright © 2017 Elsevier España, S.L.U. y SEMICYUC. All rights reserved.

Belt restraint reduction in nursing homes: design of a quasi-experimental study

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van Rossum Erik

2010-02-01

Full Text Available Abstract Background The use of physical restraints still is common practice in the nursing home care. Since physical restraints have been shown to be an ineffective and sometimes even hazardous measure, interventions are needed to reduce their usage. Several attempts have been made to reduce the use of physical restraints. Most studies used educational approaches and introduced a nurse specialist as a consultant. However, the success rate of these interventions has been inconsistent. We developed a new multi-component intervention (EXBELT comprising an educational intervention for nursing home staff in combination with a policy change (belt use is prohibited by the nursing home management, availability of a nurse specialist and nursing home manager as consultants, and availability of alternative interventions. The first aim of this study is to further develop and test the effectiveness of EXBELT on belt restraint reduction in Dutch psychogeriatric nursing homes. However, the reduction of belts should not result in an increase of other restrictive restraints (such as a chair with locked tray table or psychoactive drug use. The overall aim is an effective and feasible intervention that can be employed on a large scale in Dutch nursing homes. Methods and design Effects of EXBELT will be studied in a quasi-experimental longitudinal study design. Alongside the effect evaluation, a process evaluation will be carried out in order to further develop EXBELT. Data regarding age, gender, use of physical restraints, the number of falls and fall related injuries, psychoactive drug use, and the use of alternative interventions will be collected at baseline and after four and eight months of follow-up. Data regarding the process evaluation will be gathered in a period of eight months between baseline and the last measurement. Furthermore, changing attitudes will become an important addition to the educational part of EXBELT. Discussion A quasi-experimental

Driving Performance among Bioptic Telescope Users with Low Vision Two Years after Obtaining Their Driver's License: A Quasi-Experimental Study

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Vincent, Claude; Lachance, Jean-Paul; Deaudelin, Isabelle

2012-01-01

This study sought to compare road safety of new drivers with low vision who have followed a specific pilot bioptic training program with other groups of drivers all matched for age and driving experience. A quasi-experimental design was used two years after drivers obtained their license. Drivers were classified in the experimental group (n = 10,…

Addressing medical absenteeism in pre-vocational secondary students: effectiveness of a public health intervention, using a quasi-experimental design.

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Vanneste, Yvonne T M; Mathijssen, Jolanda J P; van de Goor, Ien A M; Rots-de Vries, Carin M C; Feron, Frans J M

2016-10-21

Students' health and school absenteeism affect educational level, with adverse effects on their future health. This interdependence is reflected in medical absenteeism. In the Netherlands, a public health intervention has been developed to address medical absenteeism in pre-vocational secondary education. This study aims to investigate the effectiveness of this intervention on students' medical absenteeism, compared to "medical absenteeism policy as usual". A quasi-experimental design with an intervention group (493 students) and a control group (445 students) was applied. Multilevel analysis was used to study differences in the development of the level of a student's medical absence over time (after 3 and 12 months). In the intervention group, the level of absenteeism decreased from 8.5 days reported sick in 12 school weeks to 5.7 days after 3 months, and to 4.9 days after 12 months. The number of absence periods fell from 3.9 in 12 school weeks to 2.5 after 3 months, and to 2.2 after 12 months. In the control group, the absence days initially decreased from 9.9 days reported sick in 12 school weeks to 8.4 days after 3 months, after which an increase to 8.9 days was measured. The number of absence periods initially decreased from 4.5 in 12 school weeks to 3.5, after which an increase to 3.7 was measured. The number of absence days per period remained about the same in both groups. The study provides first indications for the intervention to be effective for Dutch pre-vocational secondary students with increased medical absence rates. The intervention, which consists of personalised management of medical absenteeism by systematic identification of students with extensive medical absenteeism and consistent referral to youth health care physicians, appears to reduce the absence rates more effectively than "medical absenteeism policy as usual". The effectiveness of the intervention is shown primarily by a decrease in the number of periods reported sick.

A quasi-experimental evaluation of a school-based intervention for children experiencing family disruption.

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Abel, Eileen Mazur; Chung-Canine, Unju; Broussard, Karen

2013-01-01

Despite the fact that children are negatively impacted by family separation and divorce (Amato, 2001 ; Dreman & Shemi, 2004 ; Kelly, 2000 ) there is a paucity of information regarding evidence-based social work practice with children coping with family disruption. In order to address this gap, the authors describe the process and outcomes of a quasi-experimental evaluation (N = 79) designed to reduce the behavioral, emotional, and academic problems that children often face when experiencing divorce or parental separation. Results of data analysis (paired t-tests, independent t-tests, and analysis of variance) suggest (p < .05) that the intervention is effective in helping children cope with family disruption.

A quasi-experimental evaluation of parents as sexual health educators resulting in delayed sexual initiation and increased access to condoms.

Science.gov (United States)

Campero, Lourdes; Walker, Dilys; Atienzo, Erika E; Gutierrez, Juan Pablo

2011-04-01

To evaluate the effectiveness of an educational intervention for parents of first year high school students in the State of Morelos, Mexico, whose aim was to impact adolescents' sexual behavior, knowledge and access to contraception. Quasi-experimental prospective study with eleven control and eleven intervention schools using self-administered questionnaires for parents and adolescents pre- and post-intervention. Parent-child dyads in the control and intervention schools were matched according to parents' propensity score; the average treatment effect (ATE) was estimated for adolescent's outcome variables. At follow-up, we found significant differences for adolescents in the intervention schools: 6.8% delayed initiation of sexual intercourse, 14.4% had correct knowledge about emergency contraception (EC), and 164% reported having received condoms from their parents, when comparing with students in control schools. Our results suggest that parent-focused interventions could be an innovative and effective strategy to promote adolescents sexual health. Copyright © 2010 The Association for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.

Passive synchronized Q-switching between a quasi-three-level and a four-level laser

DEFF Research Database (Denmark)

Cheng, Haynes Pak Hay; Tidemand-Lichtenberg, Peter; Jensen, Ole Bjarlin

2011-01-01

Synchronized Q-switching between quasi-three-level and four-level lasers is interesting for sum-frequency generation into the blue and ultraviolet. We report, for the first time, stable synchronized Q-switching between a quasi-three-level laser at 946 nm and a four-level laser at 1064 nm in an all...

Effects of a case-based interactive e-learning course on knowledge and attitudes about patient safety: a quasi-experimental study with third-year medical students.

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Gaupp, Rainer; Körner, Mirjam; Fabry, Götz

2016-07-11

Patient safety (PS) is influenced by a set of factors on various levels of the healthcare system. Therefore, a systems-level approach and systems thinking is required to understand and improve PS. The use of e-learning may help to develop a systems thinking approach in medical students, as case studies featuring audiovisual media can be used to visualize systemic relationships in organizations. The goal of this quasi-experimental study was to determine if an e-learning can be utilized to improve systems thinking, knowledge, and attitudes towards PS. A quasi-experimental, longitudinal within- subjects design was employed. Participants were 321 third-year medical students who received online surveys before and after they participated in an e-learning course on PS. Primary outcome measures where levels of systems thinking and attitudes towards PS. Secondary outcome measures were the improvement of PS specific knowledge through the e-learning course. Levels of systems thinking showed significant improvement (58.72 vs. 61.27; p e-learning. Student's attitudes towards patient safety improved in several dimensions: After the course, students rated the influence of fatigue on safety higher (6.23 vs. 6.42, p e-learning (p e-learning can be used to teach PS. Attitudes towards PS improved on several dimensions. Furthermore, we were able to demonstrate that a specifically designed e-learning program can foster the development of conceptual frameworks such as systems thinking, which facilitates the understanding of complex socio-technical systems within healthcare organisations.

Developing Seventh Grade Students' Understanding of Complex Environmental Problems with Systems Tools and Representations: a Quasi-experimental Study

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Doganca Kucuk, Zerrin; Saysel, Ali Kerem

2017-03-01

A systems-based classroom intervention on environmental education was designed for seventh grade students; the results were evaluated to see its impact on the development of systems thinking skills and standard science achievement and whether the systems approach is a more effective way to teach environmental issues that are dynamic and complex. A quasi-experimental methodology was used to compare performances of the participants in various dimensions, including systems thinking skills, competence in dynamic environmental problem solving and success in science achievement tests. The same pre-, post- and delayed tests were used with both the comparison and experimental groups in the same public middle school in Istanbul. Classroom activities designed for the comparison group (N = 20) followed the directives of the Science and Technology Curriculum, while the experimental group (N = 22) covered the same subject matter through activities benefiting from systems tools and representations such as behaviour over time graphs, causal loop diagrams, stock-flow structures and hands-on dynamic modelling. After a one-month systems-based instruction, the experimental group demonstrated significantly better systems thinking and dynamic environmental problem solving skills. Achievement in dynamic problem solving was found to be relatively stable over time. However, standard science achievement did not improve at all. This paper focuses on the quantitative analysis of the results, the weaknesses of the curriculum and educational implications.

Flipped Instruction in a High School Science Classroom

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Leo, Jonathan; Puzio, Kelly

2016-01-01

This paper reports on a quasi-experimental study examining the effectiveness of flipped instruction in a 9th grade biology classroom. This study included four sections of freshmen-level biology taught by the first author at a private secondary school in the Pacific Northwest. Using a block randomized design, two sections were flipped and two…

A quasi-experimental cross-disciplinary evaluation of the impacts of education outside the classroom on pupils’ physical activity, well-being and learning: the TEACHOUT study protocol

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Glen Nielsen

2016-10-01

Full Text Available Abstract Background Education Outside the Classroom (EOTC is a teaching method that aims to promote schoolchildren’s learning, physical activity (PA, social relations, motivation, and well-being. EOTC activities are characterized by teachers using the local environment in their teaching, and involve innovative teaching methods, child-led approaches to problem-solving, experimentation, cooperation, PA, and play. EOTC has become common practice for many teachers in Scandinavia; however, only case studies have evaluated its impacts. The TEACHOUT study aims to evaluate the impacts of EOTC on Danish schoolchildren’s PA, social relations, motivation, well-being, and learning. Methods TEACHOUT is a quasi-experimental, cross-disciplinary study. Sixteen schools participated, containing 19 EOTC school classes and 19 parallel non-EOTC classes, with a total of 834 children aged 9 to 13 years. Measures of the children’s social relations, motivation for school, well-being, and academic performance were collected at the beginning and end of the school year. Data on PA levels were collected over ten-day periods during the school year using accelerometers. The amount and characteristics of the actual EOTC provided in both EOTC and non-EOTC classes were monitored day-to-day throughout the school year, using an online teacher survey platform. The effects of EOTC are mainly analysed by comparing EOTC pupils to non-EOTC (i.e. control pupils based on their scores on the outcome variables (i.e. school performance, well-being, motivation, and social relations at the end of the school year, adjusting for the baseline values (from the beginning of the year. The impacts of EOTC on PA are evaluated by comparing the total as well as context-specific amounts of PA of children participating in EOTC to those of children in their parallel non-EOTC classes. Furthermore, the interdependencies between PA, social relations, well-being, motivation, and learning are explored

Impact of accessible sexual and reproductive health care on poor and underserved adolescents in Managua, Nicaragua: a quasi-experimental intervention study.

NARCIS (Netherlands)

Meuwissen, L.E.; Gorter, A.C.; Knottnerus, A.J.A.

2006-01-01

BACKGROUND: The objective of this study was to evaluate a competitive voucher program intended to make sexual and reproductive health care (SRHC) accessible to adolescents from disadvantaged areas of Managua. METHODS: A quasi-experimental intervention study was performed in which 28,711 vouchers

Teaching psychomotor skills to beginning nursing students using a web-enhanced approach: a quasi-experimental study.

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Salyers, Vincent L

2007-01-01

To begin to address the problem of psychomotor skills deficiencies observed in many new graduate nurses, a skills laboratory course was developed using a web-enhanced approach. In this quasi-experimental study, the control group attended weekly lectures, observed skill demonstrations by faculty, practiced skills, and were evaluated on skill performance. The experimental group learned course content using a web-enhanced approach. This allowed students to learn course material outside of class at times convenient for them, thus they had more time during class to perfect psychomotor skills. The experimental group performed better on the final cognitive examination. Students in the traditional sections were more satisfied with the course, however. It was concluded that a web-enhanced approach for teaching psychomotor skills can provide a valid alternative to traditional skills laboratory formats.

A quasi-experimental examination of how school-based physical activity changes impact secondary school student moderate- to vigorous- intensity physical activity over time in the COMPASS study

OpenAIRE

Hunter, Stephen; Leatherdale, Scott T.; Storey, Kate; Carson, Valerie

2016-01-01

Background Adolescence is characterized by low moderate- to vigorous- intensity physical activity (MVPA) levels. Targeting the school setting can increase MVPA among a large proportion of adolescents. However, school-based physical activity interventions for adolescents remain largely ineffective. Therefore, the purpose of this study was to examine how naturally-occurring changes to school physical activity policy, recreational programming, public health resources, and the physical environmen...

The effect of interprofessional team-based learning among nursing students: A quasi-experimental study.

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Wong, Arkers Kwan Ching; Wong, Frances Kam Yuet; Chan, Lap Ki; Chan, Namkiu; Ganotice, Fraide A; Ho, Jacqueline

2017-06-01

Although interprofessional education has received attention in recent years as a means of providing opportunities for health-care professionals to learn with, from and about other disciplines and enhance the quality of patient care, evidence of its effectiveness is limited. Interprofessional team-based learning was introduced to make it possible for students in different healthcare disciplines to interact with each other, and to prepare them to function effectively within a team in their future career. To examine the effects of interprofessional team-based learning for undergraduate nursing students in terms of knowledge level, readiness for interprofessional learning, attitude towards various aspects of team learning, and perceived collective efficacy. The study employed a one-group pretest-posttest quasi-experimental design. An interprofessional education program was given to students from two universities in Hong Kong who were in different healthcare disciplines including medicine, nursing, pharmacy, biomedical science, and Chinese medicine programs. The program was based on four phases of student learning- individual readiness assessment test, ice breaking session, team readiness assessment test, and application exercise. Nursing students involved in the program were invited to complete anonymous questionnaires to evaluate their interprofessional team experience. A total of 40 nursing students (9 male, 31 female) participated in the study. A statistically significant improvement was identified in their knowledge level (pteam learning, and perceived collective efficacy (pteam-based learning can enhance cross-disciplinary learning and outcomes resulting from team efforts. Copyright © 2017 Elsevier Ltd. All rights reserved.

Health consequences of the US Deferred Action for Childhood Arrivals (DACA) immigration programme: a quasi-experimental study

OpenAIRE

Atheendar S Venkataramani, DrMD; Sachin J Shah, MD; Rourke O'Brien, PhD; Ichiro Kawachi, ProfPhD; Alexander C Tsai, MD

2017-01-01

Summary: Background: The effects of changes in immigration policy on health outcomes among undocumented immigrants are not well known. We aimed to examine the physical and mental health effects of the Deferred Action for Childhood Arrivals (DACA) programme, a 2012 US immigration policy that provided renewable work permits and freedom from deportation for a large number of undocumented immigrants. Methods: We did a retrospective, quasi-experimental study using nationally representative, repea...

Education Against Tobacco (EAT): a quasi-experimental prospective evaluation of a multinational medical-student-delivered smoking prevention programme for secondary schools in Germany.

Science.gov (United States)

Brinker, Titus J; Stamm-Balderjahn, Sabine; Seeger, Werner; Klingelhöfer, Doris; Groneberg, David A

2015-09-18

To evaluate the multinational medical-student-delivered tobacco prevention programme for secondary schools for its effectiveness to reduce the smoking prevalence among adolescents aged 11-15 years in Germany at half year follow-up. We used a prospective quasi-experimental study design with measurements at baseline (t1) and 6 months postintervention (t2) to investigate an intervention in 8 German secondary schools. The participants were split into intervention and control classes in the same schools and grades. A total of 1474 eligible participants of both genders at the age of 11-15 years were involved within the survey for baseline assessment of which 1200 completed the questionnaire at 6-month follow-up (=longitudinal sample). The schools participated voluntarily. The inclusion criteria were age (10-15 years), grade (6-8) and school type (regular secondary schools). Two 60 min school-based modules delivered by medical students. The primary end point was the difference from t1 to t2 of the smoking prevalence in the control group versus the difference from t1 to t2 in the intervention group (difference of differences approach). The percentage of former smokers and new smokers in the two groups were studied as secondary outcome measures. In the control group, the percentage of students who claimed to be smokers doubled from 4.2% (t1) to 8.1% (t2), whereas it remained almost the same in the intervention group (7.1% (t1) to 7.4% (t2); p=0.01). The likelihood of quitting smoking was almost six times higher in the intervention group (total of 67 smokers at t1; 27 (4.6%) and 7 (1.1%) in the control group; OR 5.63; 95% CI 2.01 to 15.79; p<0.01). However, no primary preventive effect was found. We report a significant secondary preventive (smoking cessation) effect at 6-month follow-up. Long-term evaluation is planned. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

THE EFFECT OF STORYTELLING IN A PLAY THERAPY ON ANXIETY LEVEL IN PRE-SCHOOL CHILDREN DURING HOSPITALIZATION IN THE GENERAL HOSPITAL OF BUTON

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Mimi Yati

2017-09-01

Full Text Available Background: Anxiety is one of the psychical stresses experienced by children during hospitalization. A storytelling in a play therapy is considered effective in reducing anxiety. Objective: This study aims to determine the effect of storytelling in a play therapy on anxiety level in pre-school children during hospitalization in the general hospital of Buton. Methods: This was a quasy-experimental study with pretest-posttest control group design. There were 30 pre-school children selected in this study using accidental sampling, with 15 assigned in each group. The Pre School - Spence Children’s Anxiety Scale (SCAS was used to measure anxiety in pre-school children. Wilcoxon matched paired test was used to analyze the data. Results: Findings showed that the mean of anxiety level in the intervention group in pretest was 42 and in posttest was 31.53. Wilcoxon matched paired test showed p-value 0.003 (<0.05, which indicated that there was a statistically significant effect of storytelling on the level of anxiety in pre-school children. Conclusions: There is a significant influence of storytelling in a play therapy on anxiety levels in pre school children during hospitalization. It is suggested that this intervention could be applied as a nursing intervention to reduce anxiety in children.

The impact of hospital-based and community based models of cerebral palsy rehabilitation: a quasi-experimental study.

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Dambi, Jermaine M; Jelsma, Jennifer

2014-12-05

Cerebral palsy requires appropriate on-going rehabilitation intervention which should effectively meet the needs of both children and parents/care-givers. The provision of effective support is a challenge, particularly in resource constrained settings. A quasi-experimental pragmatic research design was used to compare the impact of two models of rehabilitation service delivery currently offered in Harare, Zimbabwe, an outreach-based programme and the other institution-based. Questionnaires were distributed to 46 caregivers of children with cerebral palsy at baseline and after three months. Twenty children received rehabilitation services in a community setting and 26 received services as outpatients at a central hospital. The Gross Motor Function Measurement was used to assess functional change. The burden of care was measured using the Caregiver Strain Index, satisfaction with physiotherapy was assessed using the modified Medrisk satisfaction with physiotherapy services questionnaire and compliance was measured as the proportion met of the scheduled appointments. Children receiving outreach-based treatment were significantly older than children in the institution-based group. Regression analysis revealed that, once age and level of severity were controlled for, children in the outreach-based treatment group improved their motor function 6% more than children receiving institution-based services. There were no differences detected between the groups with regard to caregiver well-being and 51% of the caregivers reported signs consistent with clinical distress/depression. Most caregivers (83%) expressed that they were overwhelmed by the caregiving role and this increased with the chronicity of care. The financial burden of caregiver was predictive of caregiver strain. Caregivers in the outreach-based group reported greater satisfaction with services and were more compliant (p design interventions to alleviate the burden. The study was a pragmatic, quasi-experimental

Alcohol prevention at sporting events: study protocol for a quasi-experimental control group study

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Natalie Durbeej

2016-06-01

Full Text Available Abstract Background Alcohol intoxication and overserving of alcohol at sporting events are of great concern, given the relationships between alcohol consumption, public disturbances, and violence. During recent years this matter has been on the agenda for Swedish policymakers, authorities and key stakeholders, with demands that actions be taken. There is promising potential for utilizing an environmental approach to alcohol prevention as a strategy to reduce the level of alcohol intoxication among spectators at sporting events. Examples of prevention strategies may be community mobilization, Responsible Beverage Service training, policy work, and improved controls and sanctions. This paper describes the design of a quasi-experimental control group study to examine the effects of a multi-component community-based alcohol intervention at matches in the Swedish Premier Football League. Methods A baseline assessment was conducted during 2015 and at least two follow-up assessments will be conducted in 2016 and 2017. The two largest cities in Sweden are included in the study, with Stockholm as the intervention area and Gothenburg as the control area. The setting is Licensed Premises (LP inside and outside Swedish football arenas, in addition to arena entrances. Spectators are randomly selected and invited to participate in the study by providing a breath alcohol sample as a proxy for Blood Alcohol Concentration (BAC. Actors are hired and trained by an expert panel to act out a standardized scene of severe pseudo-intoxication. Four types of cross-sectional data are generated: (i BAC levels among ≥ 4 200 spectators, frequency of alcohol service to pseudo-intoxicated patrons attempting to purchase alcohol at LP (ii outside the arenas (≥200 attempts and (iii inside the arenas (≥ 200 attempts, and (iv frequency of security staff interventions towards pseudo-intoxicated patrons attempting to enter the arenas (≥ 200 attempts. Discussion There

Enhancing Personal Hygiene Behavior and Competency of Elementary School Adolescents through Peer-Led Approach and School-Friendly: A Quasi-Experimental Study.

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Tamiru, Dessalegn; Argaw, Alemayehu; Gerbaba, Mulusew; Ayana, Girmay; Nigussie, Aderajew; Jisha, Hunduma; Belachew, Tefera

2017-05-01

Recent studies showed that poor personal hygiene practices play a major role in the increment of communicable disease burden in developing countries. In Ethiopia, 60% of the disease burden is related to poor sanitation practices. This school based study was aimed to assess the effectiveness of school-friendly and peer-led approach in improving personal hygiene practices of school adolescents in Jimma Zone, Southwest of Ethiopia. A total of 1000 students from 10 to 19 years were included into the study. The intervention was done using peer-led approach, health clubs and linking the school events with parents. Data were collected at baseline, midline and end-line using structured questionnaires. Repeated measurement analysis was done and statistical significance was considered at alpha 0.05. The findings of this study indicated that there was a significant difference in personal hygiene practices and knowledge between the intervention and control groups (Ppersonal hygiene knowledge and practice of students in the intervention schools. Therefore, there is a need for proper health education intervention through the framework of schools for the students to improve their personal hygiene knowledge and practices.

Quasi-experimental study designs series-paper 2: complementary approaches to advancing global health knowledge.

Science.gov (United States)

Geldsetzer, Pascal; Fawzi, Wafaie

2017-09-01

Quasi-experiments have been infrequently used in the health sciences. Focusing on health systems implementation research, this article details key advantages of quasi-experiments and argues that they can complement (but not replace) randomized evaluations. Specifically, it may be possible to use a quasi-experiment to study the causal effect of an intervention that cannot feasibly be randomized or that would be unethical (e.g., because the intervention has become the standard of care) to test in a randomized controlled trial (RCT). In addition, because they usually take advantage of routinely collected data, quasi-experiments may be feasible when it is too costly (either financially or in terms of the required time) to carry out a RCT - an important advantage in research on health systems, which vary widely between settings. Nonetheless, we argue that RCTs will continue to be indispensable for implementation research because i) the assumptions needed to establish causality with a quasi-experiment are often unverifiable, ii) available data frequently do not allow for a rigorous quasi-experiment, and iii) randomized designs tend to lend themselves more to informing policy makers of causal effects prior to (or during) the full-scale rollout of an intervention than quasi-experiments. Copyright © 2017 Elsevier Inc. All rights reserved.

The impact of retirement on health: quasi-experimental methods using administrative data.

Science.gov (United States)

Horner, Elizabeth Mokyr; Cullen, Mark R

2016-02-19

Is retirement good or bad for health? Disentangling causality is difficult. Much of the previous quasi-experimental research on the effect of health on retirement used self-reported health and relied upon discontinuities in public retirement incentives across Europe. The current study investigated the effect of retirement on health by exploiting discontinuities in private retirement incentives to test the effect of retirement on health using a quasi-experimental study design. Secondary data (1997-2009) on a cohort of male manufacturing workers in a United States setting. Health status was determined using claims data from private insurance and Medicare. Analyses used employer-based administrative and claims data and claim data from Medicare. Widely used selection on observables models overstate the negative impact of retirement due to the endogeneity of the decision to retire. In addition, health status as measured by administrative claims data provide some advantages over the more commonly used survey items. Using an instrument and administrative health records, we find null to positive effects from retirement on all fronts, with a possible exception of increased risk for diabetes. This study provides evidence that retirement is not detrimental and may be beneficial to health for a sample of manufacturing workers. In addition, it supports previous research indicating that quasi-experimental methodologies are necessary to evaluate the relationship between retirement and health, as any selection on observable model will overstate the negative relationship of retirement on health. Further, it provides a model for how such research could be implemented in countries like the United States that do not have a strong public pension program. Finally, it demonstrates that such research need-not rely upon survey data, which has certain shortcomings and is not always available for homogenous samples.

Physical activity loyalty cards for behavior change: a quasi-experimental study.

Science.gov (United States)

Hunter, Ruth F; Tully, Mark A; Davis, Michael; Stevenson, Michael; Kee, Frank

2013-07-01

Financial incentives have been advocated by the UK and U.S. governments to encourage adoption of healthy lifestyles. However, evidence to support the use of incentives for changing physical activity (PA) behavior is sparse. To investigate the effectiveness of financial incentives to increase PA in adults in the workplace. Two-arm quasi-experimental design. Employees (n=406) in a workplace setting in Belfast, Northern Ireland, UK. Using a loyalty card to collect points and earn rewards, participants (n=199) in the Incentive Group monitored their PA levels and received financial incentives (retail vouchers) for minutes of PA completed over the course of a 12-week intervention period. Participants (n=207) in the comparison group used their loyalty card to self-monitor their PA levels but were not able to earn points or obtain incentives (No Incentive Group). The primary outcome was minutes of PA objectively measured using a novel PA tracking system at baseline (April 2011); Week 6 (June 2011); and Week 12 (July 2011). Other outcomes, including a self-report measure of PA, were collected at baseline, Week 12, and 6 months (October 2011). Data were analyzed in June 2012. No significant differences between groups were found for primary or secondary outcomes at the 12-week and 6-month assessments. Participants in the Incentive Group recorded 17.52 minutes of PA/week (95% CI=12.49, 22.56) compared to 16.63 minutes/week (95% CI=11.76, 21.51) in the No Incentive Group at Week 12 (p=0.59). At 6 months, participants in the Incentive Group recorded 26.18 minutes of PA/week (95% CI=20.06, 32.29) compared to 24.00 minutes/week (95% CI=17.45, 30.54) in the No Incentive Group (p=0.45). Financial incentives did not encourage participants to undertake more PA than self-monitoring PA. This study contributes to the evidence base and has important implications for increasing participation in physical activity and fostering links with the business sector. Copyright © 2013 American

A Quasi-Experimental Study of a Movement and Preliteracy Program for 3- and 4-Year-Old Children

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Chloe Bedard

2017-05-01

Full Text Available ObjectiveApproximately 28% of children are not ready for kindergarten, 91% are inactive according to current guidelines, and 21% are overweight/obese. Early intervention to strengthen movement and preliteracy skills may help to curb the concerning rates of poor school readiness, inactivity, obesity, and subsequently positively impact health across the lifespan. The objective of this pilot study was to evaluate the effectiveness of a motor and preliteracy skill program for a community sample of 3- to 4-year-old children.MethodsA quasi-experimental study design was used. The program was run for 1 h/week for 10 weeks and consisted of movement skill instruction, free play, and an interactive reading circle with care-giver involvement throughout each session. Movement and preliteracy skills were assessed in all children pre- and post-intervention using the Peabody Developmental Motor Scales-2nd edition, the Preschool Word and Print Awareness tool, and the Phonological Awareness Literacy Screening tool.ResultsNineteen families (experimental group, n = 8; control group, n = 11 were recruited (mean age = 3 years, 8 m; 47% male. There was a significant effect of group on gross motor raw scores overall [F(1, 16 = 4.67, p < 0.05; ωp2=0.16] and print-concept knowledge [F(1, 16 = 11.9, p < 0.05; ωp2=0.38].ConclusionThis study was one of the first to examine the impact of a community-based movement skill and preliteracy program with care-giver involvement in preschool children. Future research should continue to explore the effects of the program with larger and more diverse samples on multiple health and developmental outcomes.Clinical Trial RegistrationPlay and Preliteracy among Young Children (PLAY NCT02432443.

Does a Socio-Ecological School Model Promote Resilience in Primary Schools?

Science.gov (United States)

Lee, Patricia C.; Stewart, Donald E.

2013-01-01

Background: This research investigates the extent to which the holistic, multistrategy "health-promoting school" (HPS) model using a resilience intervention can lead to improved resilience among students. Methods: A quasi-experimental design using a study cohort selected from 20 primary schools in Queensland, Australia was employed. Ten…

Experimental and numerical approaches of the hydro-mechanical behaviour of a quasi-saturated compacted clayey soil

Directory of Open Access Journals (Sweden)

Li Zhong-Sen

2016-01-01

Full Text Available The present research is funded by the French National Project « TerreDurable », which is dedicated to the study of soils in quasi-saturated conditions (close to saturation for the analysis of stability and settlement of earth structures such as embankment, dams. A global presentation of the drying-wetting test shows the volume change, air entry and soil-water characteristics of the soil at slurry and oven-dried conditions. Unsaturated undrained triaxial test was carried out in order to investigate the variation of pore-water pressure from quasi-saturated domain to saturation. The experimental results of the triaxial test are then modeled using a two-dimensional explicit finite difference program (Flac 2D. A constitutive law developed in the TerreDurable project allows better understanding the behaviour of quasi-saturated soils using the water retention curve of quasi-saturated domain proposed by Boutonnier (2007, 2010. A simple effective stress model is used (Cam Clay by taking into account both the suction and the compressibility of equivalent fluid (water + air. The results from numerical calculation and experimental measurements are compared.

Effects of Palliative Care Training Program on Knowledge, Attitudes, Beliefs and Experiences Among Student Physiotherapists: A Preliminary Quasi-experimental Study

OpenAIRE

Kumar, Senthil P; Jim, Anand; Sisodia, Vaishali

2011-01-01

Background: Physiotherapists play an inherent role in the multidisciplinary palliative care team. Existing knowledge, attitudes, beliefs and experiences influence their team participation in palliative care. Aims: The objective of this study was to assess the changes in knowledge, attitudes, beliefs and experiences among student physiotherapists who attended a palliative care training program. Settings and Design: Preliminary quasi-experimental study design, conducted at an academic...

Quasi-experimental study designs series-paper 10: synthesizing evidence for effects collected from quasi-experimental studies presents surmountable challenges.

Science.gov (United States)

Becker, Betsy Jane; Aloe, Ariel M; Duvendack, Maren; Stanley, T D; Valentine, Jeffrey C; Fretheim, Atle; Tugwell, Peter

2017-09-01

To outline issues of importance to analytic approaches to the synthesis of quasi-experiments (QEs) and to provide a statistical model for use in analysis. We drew on studies of statistics, epidemiology, and social-science methodology to outline methods for synthesis of QE studies. The design and conduct of QEs, effect sizes from QEs, and moderator variables for the analysis of those effect sizes were discussed. Biases, confounding, design complexities, and comparisons across designs offer serious challenges to syntheses of QEs. Key components of meta-analyses of QEs were identified, including the aspects of QE study design to be coded and analyzed. Of utmost importance are the design and statistical controls implemented in the QEs. Such controls and any potential sources of bias and confounding must be modeled in analyses, along with aspects of the interventions and populations studied. Because of such controls, effect sizes from QEs are more complex than those from randomized experiments. A statistical meta-regression model that incorporates important features of the QEs under review was presented. Meta-analyses of QEs provide particular challenges, but thorough coding of intervention characteristics and study methods, along with careful analysis, should allow for sound inferences. Copyright © 2017 Elsevier Inc. All rights reserved.

"Crazy? So what!": A School Programme to Promote Mental Health and Reduce Stigma--Results of a Pilot Study

Science.gov (United States)

Conrad, Ines; Dietrich, Sandra; Heider, Dirk; Blume, Anne; Angermeyer, Matthias C.; Riedel-Heller, Steffi

2009-01-01

Purpose: The purpose of this paper is to evaluate the health-promoting and stigma-reducing effect of the German school-based programme "Crazy? So what!". Design/methodology/approach: A quasi-experimental longitudinal control-study was carried out with assessments one week prior to the school programme, immediately after it and three…

Tobacco control policies and perinatal health: a national quasi-experimental study.

Science.gov (United States)

Peelen, Myrthe J; Sheikh, Aziz; Kok, Marjolein; Hajenius, Petra; Zimmermann, Luc J; Kramer, Boris W; Hukkelhoven, Chantal W; Reiss, Irwin K; Mol, Ben W; Been, Jasper V

2016-04-22

We investigated whether changes in perinatal outcomes occurred following introduction of key tobacco control policies in the Netherlands: smoke-free legislation in workplaces plus a tobacco tax increase and mass media campaign (January-February 2004); and extension of the smoke-free law to the hospitality industry, accompanied by another tax increase and mass media campaign (July 2008). This was a national quasi-experimental study using Netherlands Perinatal Registry data (2000-2011; registration: ClinicalTrials.gov NCT02189265). Primary outcome measures were: perinatal mortality, preterm birth, and being small-for-gestational age (SGA). The association with timing of the tobacco control policies was investigated using interrupted time series logistic regression analyses with adjustment for confounders. Among 2,069,695 singleton births, there were 13,027 (0.6%) perinatal deaths, 116,043 (5.6%) preterm live-births and 187,966 (9.1%) SGA live-births. The 2004 policies were not associated with significant changes in the odds of developing any of the primary outcomes. After the 2008 policy change, a -4.4% (95% CI -2.4; -6.4, p law to bars and restaurants in conjunction with a tax increase and mass media campaign.

[A school-level longitudinal study of clinical performance examination scores].

Science.gov (United States)

Park, Jang Hee

2015-06-01

This school-level longitudinal study examined 7 years of clinical performance data to determine differences (effects) in students and annual changes within a school and between schools; examine how much their predictors (characteristics) influenced the variation in student performance; and calculate estimates of the schools' initial status and growth. A school-level longitudinal model was tested: level 1 (between students), level 2 (annual change within a school), and level 3 (between schools). The study sample comprised students who belonged to the CPX Consortium (n=5,283 for 2005~2008 and n=4,337 for 2009~2011). Despite a difference between evaluation domains, the performance outcomes were related to individual large-effect differences and small-effect school-level differences. Physical examination, clinical courtesy, and patient education were strongly influenced by the school effect, whereas patient-physician interaction was not affected much. Student scores are influenced by the school effect (differences), and the predictors explain the variation in differences, depending on the evaluation domain.

Indiana Third Grade Reading ISTEP+ Scores Comparisons in a Public Elementary School to a Public Elementary Charter School

Science.gov (United States)

Gray, Cassandra D.

2011-01-01

The purpose of this study was to determine if there was a difference with student achievement at third grade in reading with a traditional public school as compared to a public charter school; both schools were a part of the Southwest Region School Corporation. This quasi-experimental study compared third grade ISTEP+ scale scores in…

The utility of Geographical Information Systems (GIS) in systems-oriented obesity intervention projects: the selection of comparable study sites for a quasi-experimental intervention design--TX CORD.

Science.gov (United States)

Oluyomi, Abiodun O; Byars, Allison; Byrd-Williams, Courtney; Sharma, Shreela V; Durand, Casey; Hoelscher, Deanna M; Butte, Nancy F; Kelder, Steven H

2015-02-01

The Texas Childhood Obesity Research Demonstration project (TX CORD) uses a systems-oriented approach to address obesity that includes individual and family interventions, community-level action, as well as environmental and policy initiatives. Given that randomization is seldom possible in community-level intervention studies, TX CORD uses a quasi-experimental design. Comparable intervention and comparison study sites are needed to address internal validity bias. TX CORD was designed to be implemented in low-income, ethnically diverse communities in Austin and Houston, Texas. A three-stage Geographical Information System (GIS) methodology was used to establish and ascertain the comparability of the intervention and comparison study sites. Census tract (stage 1) and school (stage 2) data were used to identify spatially exclusive geographic areas that were comparable. In stage 3, study sites were compared on demographic characteristics, socioeconomic status (SES), food assets, and physical activity (PA) assets. Student's t-test was used to examine significant differences between the selected sites. The methodology that was used resulted in the selection of catchment areas with demographic and socioeconomic characteristics that fit the target population: ethnically diverse population; lower-median household income; and lower home ownership rates. Additionally, the intervention and comparison sites were statistically comparable on demographic and SES variables, as well as food assets and PA assets. This GIS approach can provide researchers, program evaluators, and policy makers with useful tools for both research and practice. Area-level information that allows for robust understanding of communities can enhance analytical procedures in community health research and offer significant contributions in terms of community assessment and engagement.

Students' Critical Mathematical Thinking Skills and Character: Experiments for Junior High School Students through Realistic Mathematics Education Culture-Based

Science.gov (United States)

Palinussa, Anderson L.

2013-01-01

This paper presents the findings of a quasi-experimental with pre-test-post-test design and control group that aims to assess students' critical mathematical thinking skills and character through realistic mathematics education (RME) culture-based. Subjects of this study were 106 junior high school students from two low and medium schools level in…

A Controlled Quasi-Experimental Study of an Educational Intervention to Reduce the Unnecessary Use of Antimicrobials For Asymptomatic Bacteriuria

OpenAIRE

Irfan, Neal; Brooks, Annie; Mithoowani, Siraj; Celetti, Steve J.; Main, Cheryl; Mertz, Dominik

2015-01-01

Background Asymptomatic bacteriuria (ABU) should only be treated in cases of pregnancy or in-patients undergoing urologic procedures; however, unnecessary treatment of ABU is common in clinical practice. Objective To identify risk factors for unnecessary treatment and to assess the impact of an educational intervention focused on these risk factors on treatment of ABU. Design Quasi-experimental study with a control group. Setting Two tertiary teaching adult care hospitals. Participants Consec...

The Impact of Educational Intervention on Aggression Level among High School Students in Ilam-Iran

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Adel Bahari

2017-01-01

Full Text Available BackgroundManagement and control of adolescence aggression improves constructive relationships, quality of life, and academic achievement. This research aimed to study the impact of educational intervention on reduction of aggression among male high school students in Ilam city, Iran.Materials and MethodsThis quasi-experimental intervention study using the pretest-posttest method was conducted on 70 aggressive male high school students in Ilam who were selected using the convenience sampling method. First, students were asked to fill out the Buss-Perry Aggression Questionnaire (BPAQand 70 of them with the highest score of aggression were selected as the sample. They received educational intervention for eight 90-minute sessions  during one month. Then post-test data were collected and follow-up at three months after the intervention and statistically analyzed using SPSS-20.ResultsThe mean age of subjects was 15.81±1.24 years old. 83% belonged to the urban community and 12.5% belonged to the rural community. The results showed that the educational intervention was effective in reduction of aggression levels and its four subscales (P

Experimental and Computational Studies of the Superconducting Phase Transition of Quasi 1D Superconductors

Science.gov (United States)

Wong, Chi Ho

In this PhD project, the feasibility of establishing a state with vanishing resistance in quasi-1D superconductors are studied. In the first stage, extrinsic quasi-1D superconductors based on composite materials made by metallic nanowire arrays embedded in mesoporous silica substrates, such as Pb-SBA-15 and NbN-SBA-15 (fabricated by a Chemical Vapor Deposition technique) are investigated. Two impressive outcomes in Pb-SBA-15 are found, including an enormous enhancement of the upper critical field from 0.08T to 14T and an increase of the superconducting transition temperature onset s from 7.2 to 11K. The second stage is to apply Monte Carlo simulations to model the quasi-1D superconductor, considering its penetration depth, coherence length, defects, electron mean free path, tunneling barrier and insulating width between the nanowires. The Monte Carlo results provide a clear picture to approach to stage 3, which represents a study of the intrinsic quasi-1D superconductor Sc3CoC4, which contains parallel arrays of 1D superconducting CoC4 ribbons with weak transverse Josephson or Proximity interaction, embedded in a Sc matrix. According to our previous work, a BKT transition in the lateral plane is believed to be the physics behind the vanishing resistance of quasi-1D superconductors, because it activates a dimensional crossover from a 1D fluctuating superconductivity at high temperature to a 3D bulk phase coherent state in the entire material at low temperatures. Moreover, we decided to study thin 1D Sn nanowires without substrate, which display very similar superconducting properties to Pb-SBA-15 with a strong critical field and Tc enhancement. Finally, a preliminary research on a novel quasi-2D superconductor formed by parallel 2D mercury sheets that are separated by organic molecules is presented. The latter material may represent a model system to study the effect of a layered structure, which is believed to be an effective ingredient to design high temperature

Statistical analysis and application of quasi experiments to antimicrobial resistance intervention studies.

Science.gov (United States)

Shardell, Michelle; Harris, Anthony D; El-Kamary, Samer S; Furuno, Jon P; Miller, Ram R; Perencevich, Eli N

2007-10-01

Quasi-experimental study designs are frequently used to assess interventions that aim to limit the emergence of antimicrobial-resistant pathogens. However, previous studies using these designs have often used suboptimal statistical methods, which may result in researchers making spurious conclusions. Methods used to analyze quasi-experimental data include 2-group tests, regression analysis, and time-series analysis, and they all have specific assumptions, data requirements, strengths, and limitations. An example of a hospital-based intervention to reduce methicillin-resistant Staphylococcus aureus infection rates and reduce overall length of stay is used to explore these methods.

Delayed school start times and adolescent sleep: A systematic review of the experimental evidence.

Science.gov (United States)

Minges, Karl E; Redeker, Nancy S

2016-08-01

Many schools have instituted later morning start times to improve sleep, academic, and other outcomes in response to the mismatch between youth circadian rhythms and early morning start times. However, there has been no systematic synthesis of the evidence on the effects of this practice. To examine the impact of delayed school start time on students' sleep, health, and academic outcomes, electronic databases were systematically searched and data were extracted using the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. Six studies satisfied selection criteria and used pre-post, no control (n = 3), randomized controlled trial (n = 2), and quasi-experimental (n = 1) designs. School start times were delayed 25-60 min, and correspondingly, total sleep time increased from 25 to 77 min per weeknight. Some studies revealed reduced daytime sleepiness, depression, caffeine use, tardiness to class, and trouble staying awake. Overall, the evidence supports recent non-experimental study findings and calls for policy that advocates for delayed school start time to improve sleep. This presents a potential long-term solution to chronic sleep restriction during adolescence. However, there is a need for rigorous randomized study designs and reporting of consistent outcomes, including objective sleep measures and consistent measures of health and academic performance. Copyright © 2015 Elsevier Ltd. All rights reserved.

An Experimental Study of Circular Cutout Hole Effect of Kevlar/epoxy-Al2O3 Composite under Subjected to Quasi-Static Compressive and Tensile Loading

Directory of Open Access Journals (Sweden)

Ayad Abed Ramadhan

2017-12-01

Full Text Available This paper has presented an experimental study of quasi-static compressive and tensile loading of cutout hole specimens of Kevlar-29/epoxy-Al2O3 laminated composite. The experimental procedure hasbeen developed to study the performance of (50%, 55% and 60% volume fraction (vf and (0o/90o and +45o/-45o fiber orientation angle effects of these composites under quasi-static tensile and compressiveload using a servo-hydraulic testing machine. The study was concluded that the ultimate load capacity increases as volume fraction increases in tensile test. While, the maximum load bearing capacity increaseswith the decrease of volume fraction in compression test. Hence, from the results obtained it can have considered the 55% volume fraction of composite panels is a good value for tensile and compressionapplications.

Digital Storytelling for Enhancing Student Academic Achievement, Critical Thinking, and Learning Motivation: A Year-Long Experimental Study

Science.gov (United States)

Yang, Ya-Ting C.; Wu, Wan-Chi I.

2012-01-01

The purpose of this study was to explore the impact of Digital storytelling (DST) on the academic achievement, critical thinking, and learning motivation of senior high school students learning English as a foreign language. The one-year study adopted a pretest and posttest quasi-experimental design involving 110 10th grade students in two English…

Digital Media-based Health Intervention on the promotion of Women's physical activity: a quasi-experimental study.

Science.gov (United States)

Peyman, Nooshin; Rezai-Rad, Majid; Tehrani, Hadi; Gholian-Aval, Mahdi; Vahedian-Shahroodi, Mohammad; Heidarian Miri, Hamid

2018-01-15

Technological advances have caused poor mobility and lower physical activity among humankind. This study was conducted to assess the impact of a digital media-based (multi-media, internet, and mobile phone) health intervention on promotion of women's physical activity. In this quasi-experimental study, 360 women were divided into case and control groups. The digital media-based educational intervention was conducted in two months in the case group electronically, using mail and Internet and telephone platforms. Physical activity was measured using International Physical Activity Questionnaire (IPAQ) that estimated women's physical activity rate in the previous week. Data was analyzed using descriptive and analytical statistics (ANOVA, chi-square, paired and independent t-tests) using SPSS 20. The mean score of knowledge, attitude and level of physical activity in the control group were not significantly different before and after the intervention. While in the case group, this difference before and after the intervention was significant (p digital media-based health education can be effective in improving health-based behavior such as physical activity. Therefore, it seems necessary to develop user-based strategies and strengthen the behavioral change theories and hypotheses based on digital media for effective influence on behavior. Iranian Registry of Clinical Trials (IRCT), IRCT20160619028529N5 . Registered December 24, 2017 [retrospectively registered].

Evaluation of support group interventions for children in troubled families: study protocol for a quasi-experimental control group study.

Science.gov (United States)

Skerfving, Annemi; Johansson, Fredrik; Elgán, Tobias H

2014-01-24

Support groups for children in troubled families are available in a majority of Swedish municipalities. They are used as a preventive effort for children in families with different parental problems such as addiction to alcohol/other drugs, mental illness, domestic violence, divorce situations, or even imprisonment. Children from families with these problems are a well-known at-risk group for various mental health and social problems. Support groups aim at strengthening children's coping behaviour, to improve their mental health and to prevent a negative psycho-social development. To date, evaluations using a control-group study design are scarce. The aim of the current study is to evaluate the effects of support groups. This paper describes the design of an effectiveness study, initially intended as a randomized controlled trial, but instead is pursued as a quasi-experimental study using a non-randomized control group. The aim is to include 116 children, aged 7-13 years and one parent/another closely related adult, in the study. Participants are recruited via existing support groups in the Stockholm county district and are allocated either into an intervention group or a waiting list control group, representing care as usual. The assessment consists of questionnaires that are to be filled in at baseline and at four months following the baseline. Additionally, the intervention group completes a 12-month follow-up. The outcomes include the Strength and Difficulties Questionnaire (SDQ S11-16), the Kids Coping Scale, the "Ladder of life" which measures overall life satisfaction, and "Jag tycker jag är" (I think I am) which measures self-perception and self-esteem. The parents complete the SDQ P4-16 (parent-report version) and the Swedish scale "Familjeklimat" (Family Climate), which measures the emotional climate in the family. There is a need for evaluating the effects of support groups targeted to children from troubled families. This quasi-experimental study

Current Parental Depression and Offspring Perceived Self-Competence: A Quasi-Experimental Examination

OpenAIRE

Class, Quetzal A.; D’Onofrio, Brian M.; Singh, Amber L.; Ganiban, Jody M.; Spotts, E. L.; Lichtenstein, Paul; Reiss, David; Neiderhiser, Jenae M.

2012-01-01

A genetically-informed, quasi-experimental design was used to examine the genetic and environmental processes underlying associations between current parental depressive symptoms and offspring perceived self-competence. Participants, drawn from a population-based Swedish sample, were 852 twin pairs and their male (52%) and female offspring aged 15.7 ± 2.4 years. Parental depressive symptoms were measured using the Center for Epidemiological Studies Depression scale. Offspring perceived self-c...

Differentiated Financing of Schools in French-Speaking Belgium: Prospectives for Regulating a School Quasi-Market

Science.gov (United States)

Demeuse, Marc; Derobertmasure, Antoine; Friant, Nathanael

2010-01-01

The school quasi-market in French-speaking Belgium is characterised by segregation. Efforts to apply measures that encourage greater social mixing have met with stiff resistance. In 2008 and 2009, turbulence was caused by the application of the "social mixing" law influencing the registration procedures. The purpose of this article is to…

The quasi-biennial oscillation of 1.7 years in ground level enhancement events

Science.gov (United States)

Velasco Herrera, V. M.; Pérez-Peraza, J.; Soon, W.; Márquez-Adame, J. C.

2018-04-01

The so-called Ground Level Enhancement events are sporadic relativistic solar particles measured at ground level by a network of cosmic ray detectors worldwide. These sporadic events are typically assumed to occur by random chance. However, we find that by studying the last 56 ground level enhancement events reported from 1966 through 2014, these events occur preferentially in the positive phase of the quasi-biennial oscillation of 1.7 year periodicity. These discrete ground level enhancement events show that there is another type of solar emission (i.e., wavelike packets) that occurs only in a specific phase of a very particular oscillation. We interpret this empirical result to support that ground level enhancement events are not a result of purely stochastic processes. We used the Morlet wavelet to analyze the phase of each of the periodicities found by the wavelet analyses and local variations of power spectral density in these sporadic events. We found quasi-regular periodicities of 10.4, 6.55, 4.12, 2.9, 1.73, 0.86, 0.61, 0.4 and 0.24 years in ground level enhancements. Although some of these quasi-biennial oscillation periodicities (i.e., oscillations operating between 0.6 and 4 years) may be interpreted as simply harmonics and overtones of the fundamental solar cycle from the underlying sun-spot magnetism phenomenon. The sources of these periodicities are still unclear. Also there is no clear mechanism for the variability of the quasi-biennial oscillation periodicities itself. The quasi-biennial oscillation periodicities are broadly considered to be a variation of solar activity, associated with the solar dynamo process. Also, the intensity of these periodicities is more important around the years of maximum solar activity because the quasi-biennial oscillation periodicities are modulated by the solar cycle where the Sun is more energetically enhanced during activity maxima. To identify the relationships among ground level enhancement, solar, and cosmic

Threats to the Internal Validity of Experimental and Quasi-Experimental Research in Healthcare.

Science.gov (United States)

Flannelly, Kevin J; Flannelly, Laura T; Jankowski, Katherine R B

2018-01-24

The article defines, describes, and discusses the seven threats to the internal validity of experiments discussed by Donald T. Campbell in his classic 1957 article: history, maturation, testing, instrument decay, statistical regression, selection, and mortality. These concepts are said to be threats to the internal validity of experiments because they pose alternate explanations for the apparent causal relationship between the independent variable and dependent variable of an experiment if they are not adequately controlled. A series of simple diagrams illustrate three pre-experimental designs and three true experimental designs discussed by Campbell in 1957 and several quasi-experimental designs described in his book written with Julian C. Stanley in 1966. The current article explains why each design controls for or fails to control for these seven threats to internal validity.

A Customized Intervention for Dementia Caregivers: A Quasi-Experimental Design.

Science.gov (United States)

Wawrziczny, Emilie; Larochette, Clotilde; Papo, David; Constant, Emilie; Ducharme, Francine; Kergoat, Marie-Jeanne; Pasquier, Florence; Antoine, Pascal

2018-04-01

The aim of this study is to test the effects of a customized intervention on distress among caregivers of persons with dementia (PWD) using a quasi-experimental design. Fifty-one spouse caregivers in the experimental group and 51 in the control group participated in the study. The effects of the intervention were examined by comparing caregivers' responses with questionnaires at pre-intervention baseline (T0) and immediately after intervention (T1). Differences were quantified using repeated-measures ANOVA. The analyses indicated a stabilizing effect of the intervention on caregivers' perceptions of PWD's daily functioning, self-esteem related to caregiving, quality of family support, and feeling of distress. Linear increases were observed regarding sense of preparedness and impact on daily routine, while no differences (interaction and linear effects) were observed for degree of self-efficacy, depression, impact on finances, or self-rated health. These findings show a preliminary efficacy of the intervention proposed in this study to prevent the exacerbation of caregivers' distress.

The Utility of Geographical Information Systems (GIS) in Systems-Oriented Obesity Intervention Projects: The Selection of Comparable Study Sites for a Quasi-Experimental Intervention Design—TX CORD

Science.gov (United States)

Byars, Allison; Byrd-Williams, Courtney; Sharma, Shreela V.; Durand, Casey; Hoelscher, Deanna M.; Butte, Nancy F.; Kelder, Steven H.

2015-01-01

Abstract Background: The Texas Childhood Obesity Research Demonstration project (TX CORD) uses a systems-oriented approach to address obesity that includes individual and family interventions, community-level action, as well as environmental and policy initiatives. Given that randomization is seldom possible in community-level intervention studies, TX CORD uses a quasi-experimental design. Comparable intervention and comparison study sites are needed to address internal validity bias. Methods: TX CORD was designed to be implemented in low-income, ethnically diverse communities in Austin and Houston, Texas. A three-stage Geographical Information System (GIS) methodology was used to establish and ascertain the comparability of the intervention and comparison study sites. Census tract (stage 1) and school (stage 2) data were used to identify spatially exclusive geographic areas that were comparable. In stage 3, study sites were compared on demographic characteristics, socioeconomic status (SES), food assets, and physical activity (PA) assets. Student's t-test was used to examine significant differences between the selected sites. Results: The methodology that was used resulted in the selection of catchment areas with demographic and socioeconomic characteristics that fit the target population: ethnically diverse population; lower-median household income; and lower home ownership rates. Additionally, the intervention and comparison sites were statistically comparable on demographic and SES variables, as well as food assets and PA assets. Conclusions: This GIS approach can provide researchers, program evaluators, and policy makers with useful tools for both research and practice. Area-level information that allows for robust understanding of communities can enhance analytical procedures in community health research and offer significant contributions in terms of community assessment and engagement. PMID:25587670

Effects of a Teacher Professional Development Program on the Mathematics Achievement of Middle School Students

Science.gov (United States)

Sample McMeeking, Laura B.; Orsi, Rebecca; Cobb, R. Brian

2012-01-01

The effect of a 15- to 24-month in-service professional development (PD) program on state accountability mathematics test scores for middle school students was examined using a quasi-experimental design. Middle level mathematics teachers (n = 128) from 7 school districts and 64 middle schools volunteered for a PD sequence of content-oriented…

Efficient quasi-three-level Nd:YAG laser at 946 nm pumped by a tunable external cavity tapered diode laser

DEFF Research Database (Denmark)

Cheng, Haynes Pak Hay; Jensen, Ole Bjarlin; Tidemand-Lichtenberg, Peter

2010-01-01

Using a tunable external cavity tapered diode laser (ECDL) pumped quasi-three-level Nd:YAG laser, a fivefold reduction in threshold and twofold increase in slope efficiency is demonstrated when compared to a traditional broad area diode laser pump source. A TEM00 power of 800 mW with 65% slope...... efficiency is obtained, the highest reported TEM00 power from any 946 nm Nd:YAG laser pumped by a single emitter diode laser pump source. A quantum efficiency of 0.85 has been estimated from experimental data using a simple quasi-three-level model. The reported value is in good agreement with published...

Perceived quality of reproductive care for girls in a competitive voucher programma: a quasi-experimental intervention study, Managua, Nicaragua.

NARCIS (Netherlands)

Meuwissen, S.G.M.; Gorter, A.C.; Knottnerus, J.A.

2006-01-01

Objective: To determine whether female adolescents from low-income areas in Managua were satisfied with the sexual and reproductive health (SRH) care provided through a competitive voucher programme and to analyse the determinants of their satisfaction. Design: A community-based quasi-experimental

An experimental study of irregular wave forces on multiple quasi-ellipse caissons

Science.gov (United States)

Ren, Xiaozhong; Zhang, Peng; Ma, Yuxiang; Meng, Yufan

2014-09-01

An experimental investigation of irregular wave forces on quasi-ellipse caisson structures is presented. Irregular waves were generated based on the Jonswap spectrum with two significant wave heights, and the spectrum peak periods range from 1.19 s to 1.81 s. Incident wave directions relative to the centre line of the multiple caissons are from 0° to 22.5°. The spacing between caissons ranges from 2 to 3 times that of the width of the caisson. The effects of these parameters on the wave forces of both the perforated and non-perforated caissons were compared and analyzed. It was found that the perforated caisson can reduce wave forces, especially in the transverse direction. Furthermore, the relative interval and incident wave direction have significant effects on the wave forces in the case of multiple caissons.

Effect of 6-month community-based exercise interventions on gait and functional fitness of an older population: a quasi-experimental study

Directory of Open Access Journals (Sweden)

Ramalho F

2018-04-01

Full Text Available Fátima Ramalho,1,2 Rita Santos-Rocha,1,2 Marco Branco,1,2 Vera Moniz-Pereira,2 Helô-Isa André,2 António P Veloso,2 Filomena Carnide2 1Sport Sciences School of Rio Maior (ESDRM, Polytechnic Institute of Santarém, Rio Maior, Portugal; 2Laboratory of Biomechanics and Functional Morphology, Interdisciplinary Centre for the Study of Human Performance (CIPER, Faculty of Human Kinetics (FMH, University of Lisbon, Cruz Quebrada, Portugal Background: Gait ability in older adults has been associated with independent living, increased survival rates, fall prevention, and quality of life. There are inconsistent findings regarding the effects of exercise interventions in the maintenance of gait parameters.Objectives: The aim of the study was to analyze the effects of a community-based periodized exercise intervention on the improvement of gait parameters and functional fitness in an older adult group compared with a non-periodized program.Methods: A quasi-experimental study with follow-up was performed in a periodized exercise group (N=15 and in a non-periodized exercise group (N=13. The primary outcomes were plantar pressure gait parameters, and the secondary outcomes were physical activity, aerobic endurance, lower limb strength, agility, and balance. These variables were recorded at baseline and after 6 months of intervention.Results: Both programs were tailored to older adults’ functional fitness level and proved to be effective in reducing the age-related decline regarding functional fitness and gait parameters. Gait parameters were sensitive to both the exercise interventions. Conclusion: These exercise protocols can be used by exercise professionals in prescribing community exercise programs, as well as by health professionals in promoting active aging. Keywords: mobility, community exercise programs, active aging, plantar pressure analysis, ground reaction forces, gait properties

A QUASI EXPERIMENTAL STUDY TO EVALUATE EFFECTIVENESS OF GLYCERIN MAGNESIUM SULPHATE DRESSING ON PHLEBITIS AMONG PATIENTS UNDERGOING PERIPHERAL INTRAVENOUS INFUSION IN SELECTED HOSPITAL,VADODARA

Directory of Open Access Journals (Sweden)

Ravindra HN, Patel Krupa D

2015-07-01

Full Text Available Introduction: Intravenous therapy is indicated for many reasons. A significant number of patients admitted into hospital receive some forms of intravenous therapy through peripheral venous cannula, which is a common procedure carried out in hospital to allow rapid and accurate administration of medication. However, the intravenous cannulation can have undesirable effects, the most of which is phlebitis, which is due to mechanical, chemical or infectious cause. Method: In this study quasi-experimental research approach was used. Non probability purposive sampling technique was used to select the sample from the selected hospital. The research design adopted for the study was pre-test, post-test control group design. In the present study a sample of 60 hospitalised patients and who met the inclusion criteria was selected from the target population. In this study the instruments used are baseline Performa, structured interview schedule to assess the subjective symptoms and observation scale to observe the objective symptoms. Result: In experimental group post test mean score 1.10, SD was 0.71 respectively. In control group post test mean score 2.53, SD was 0.78 respectively. The obtained value 7.454 statistically was significant at 0.001 levels. So research hypothesis was accepted. So there was significant difference between post intervention phlebitis among the experimental group and control group. Discussion: In the research study findings revealed that Glycerin Magnesium sulphate dressing is highly effective in decrease phlebitis level to the patients.

Quantum oscillations in quasi-two-dimensional conductors

CERN Document Server

Galbova, O

2002-01-01

The electronic absorption of sound waves in quasi-two-dimensional conductors in strong magnetic fields, is investigated theoretically. A longitudinal acoustic wave, propagating along the normal n-> to the layer of quasi-two-dimensional conductor (k-> = left brace 0,0,k right brace; u-> = left brace 0,0,u right brace) in magnetic field (B-> = left brace 0, 0, B right brace), is considered. The quasiclassical approach for this geometry is of no interest, due to the absence of interaction between electromagnetic and acoustic waves. The problem is of interest in strong magnetic field when quantization of the charge carriers energy levels takes place. The quantum oscillations in the sound absorption coefficient, as a function of the magnetic field, are theoretically observed. The experimental study of the quantum oscillations in quasi-two-dimensional conductors makes it possible to solve the inverse problem of determining from experimental data the extrema closed sections of the Fermi surface by a plane p sub z = ...

A Study of the Generalizability of Teacher Change Quasi-Experiments

Science.gov (United States)

Stringfield, Samuel; Schaffer, Eugene; Devlin-Scherer, Roberta

2017-01-01

Quasi-experimental teacher effectiveness studies have indicated that properly designed staff development programs can lead to changes in teacher and student behavior and to gains in student achievement. Those studies involved workshop series led by nationally known scholars. Using instructors from varied backgrounds, the current study examined the…

Nursing students learning the pharmacology of diabetes mellitus with complexity-based computerized models: A quasi-experimental study.

Science.gov (United States)

Dubovi, Ilana; Dagan, Efrat; Sader Mazbar, Ola; Nassar, Laila; Levy, Sharona T

2018-02-01

Pharmacology is a crucial component of medications administration in nursing, yet nursing students generally find it difficult and self-rate their pharmacology skills as low. To evaluate nursing students learning pharmacology with the Pharmacology Inter-Leaved Learning-Cells environment, a novel approach to modeling biochemical interactions using a multiscale, computer-based model with a complexity perspective based on a small set of entities and simple rules. This environment represents molecules, organelles and cells to enhance the understanding of cellular processes, and combines these cells at a higher scale to obtain whole-body interactions. Sophomore nursing students who learned the pharmacology of diabetes mellitus with the Pharmacology Inter-Leaved Learning-Cells environment (experimental group; n=94) or via a lecture-based curriculum (comparison group; n=54). A quasi-experimental pre- and post-test design was conducted. The Pharmacology-Diabetes-Mellitus questionnaire and the course's final exam were used to evaluate students' knowledge of the pharmacology of diabetes mellitus. Conceptual learning was significantly higher for the experimental than for the comparison group for the course final exam scores (unpaired t=-3.8, pLearning with complexity-based computerized models is highly effective and enhances the understanding of moving between micro and macro levels of the biochemical phenomena, this is then related to better understanding of medication actions. Moreover, the Pharmacology Inter-Leaved Learning-Cells approach provides a more general reasoning scheme for biochemical processes, which enhances pharmacology learning beyond the specific topic learned. The present study implies that deeper understanding of pharmacology will support nursing students' clinical decisions and empower their proficiency in medications administration. Copyright © 2017 Elsevier Ltd. All rights reserved.

Experimental Study of a Thermoelectric Generation System

DEFF Research Database (Denmark)

Zhu, Junpeng; Gao, Junling; Chen, Min

2011-01-01

. System-level simulation is carried out using a quasi-one-dimensional numerical model that enables direct comparison with experimental results. The results of both experiment and simulation will provide a foundation to improve and optimize complex thermoelectric generation systems....

Effectiveness of Guided Multiple Choice Objective Questions Test on Students' Academic Achievement in Senior School Mathematics by School Location

Science.gov (United States)

Igbojinwaekwu, Patrick Chukwuemeka

2015-01-01

This study investigated, using pretest-posttest quasi-experimental research design, the effectiveness of guided multiple choice objective questions test on students' academic achievement in Senior School Mathematics, by school location, in Delta State Capital Territory, Nigeria. The sample comprised 640 Students from four coeducation secondary…

Implementation of PATHS through Dutch Municipal Health Services: A Quasi-Experiment

Directory of Open Access Journals (Sweden)

Ferry X. Goossens

2012-12-01

Full Text Available Only a limited number of effectiveness studies have been performed to study the benefits of efficacious behavior problems prevention programs for children when implemented through national health service systems. This study uses a quasi-experimental design to test the effectiveness of the school-based PATHS prevention program (Providing Alternative THinking Strategies when implemented through Dutch municipal health services by health promotion professionals. A sample of 1,294 children was followed for two years: 674 children attending nine schools providing PATHS and 620 children in nine comparison schools. We hypothesized finding an intervention effect of PATHS in terms of a significant reduction in teacher- and student-rated externalizing and internalizing problem behaviors, and a significant improvement in teacher-, student-, and peer-rated social skills and emotional skills. In fact, the results show low levels of programimplementation and no intervention effects on problem behavior or social and emotional skills, suggesting that it is hard to reproduce positive intervention effects where an efficacious social-emotional prevention program is implemented through a national health service. More research is needed on the specific conditions required to implement efficacious programs effectively.

Optimization of end-pumped, actively Q-switched quasi-III-level lasers.

Science.gov (United States)

Jabczynski, Jan K; Gorajek, Lukasz; Kwiatkowski, Jacek; Kaskow, Mateusz; Zendzian, Waldemar

2011-08-15

The new model of end-pumped quasi-III-level laser considering transient pumping processes, ground-state-depletion and up-conversion effects was developed. The model consists of two parts: pumping stage and Q-switched part, which can be separated in a case of active Q-switching regime. For pumping stage the semi-analytical model was developed, enabling the calculations for final occupation of upper laser level for given pump power and duration, spatial profile of pump beam, length and dopant level of gain medium. For quasi-stationary inversion, the optimization procedure of Q-switching regime based on Lagrange multiplier technique was developed. The new approach for optimization of CW regime of quasi-three-level lasers was developed to optimize the Q-switched lasers operating with high repetition rates. Both methods of optimizations enable calculation of optimal absorbance of gain medium and output losses for given pump rate. © 2011 Optical Society of America

Length of perineal pain relief after ice pack application: A quasi-experimental study.

Science.gov (United States)

de Souza Bosco Paiva, Caroline; Junqueira Vasconcellos de Oliveira, Sonia Maria; Amorim Francisco, Adriana; da Silva, Renata Luana; de Paula Batista Mendes, Edilaine; Steen, Mary

2016-04-01

Ice pack is effective for alleviating postpartum perineal pain in primiparous women while multiparous women's levels of perineal pain appear to be poorly explored. Ice pack is a low-cost non-invasive localised treatment that can be used with no impact on breastfeeding. However, how long perineal analgesia persists after applying an ice pack is still unknown. To evaluate if perineal analgesia is maintained up to 2h after applying an ice pack to the perineum for 20min. A quasi-experimental study, using a pre and post-test design, was undertaken with a sample size of 50 multiparous women in Brazil. Data was collected by structured interview. The intervention involved a single application of an ice pack applied for 20min to the perineal area of women who reported perineal pain ≥3 by use of a numeric rating scale (0-10), with intact perineum, 1st or 2nd degree lacerations or episiotomy, between 6 and 24h after spontaneous vaginal birth. Perineal pain was evaluated at three points of time: before, immediately after and 2h after applying an ice pack. Immediately after applying an ice pack to the perineal area, there was a significant reduction in the severity of perineal pain reported (5.4 vs. 1.0, p<0.0005), which continued for 1h 35min up to 2h after the local application. Ice pack application for 20min is effective for alleviating postpartum perineal pain and continues to be effective between 1h 35min for up to 2h. Copyright © 2015 Australian College of Midwives. Published by Elsevier Ltd. All rights reserved.

State residence restrictions and forcible rape rates: a multistate quasi-experimental analysis of UCR data.

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Socia, Kelly M

2015-04-01

This study examines whether the presence of state residence restrictions resulted in changes in statewide rates of forcible rape. It builds on the limited geographic coverage of prior studies by including state-level Uniform Crime Report (UCR) data across 19 years for 49 states and the District of Columbia. It uses a quasi-experimental research method based on a longitudinal fixed-effects panel model design, which can help control for relatively static differences between states. Results indicate that when a state residence restriction was present, regardless of how it was measured, rates of UCR forcible rape were higher in the state than when the policy was not present. This suggests that residence restrictions, at least at the state level, are not useful as an overall crime prevention measure, but may be useful for increasing detection or reporting levels of such crimes. However, results also suggest that the size of the increase varied by whether the policy only applied to offenders with child victims or also included those with adult victims. Implications for research and policy are discussed. © The Author(s) 2013.

A modified two-level three-phase quasi-soft-switching inverter

DEFF Research Database (Denmark)

Liu, Yusheng; Wu, Weimin; Blaabjerg, Frede

2014-01-01

A traditional Voltage Source Inverter (VSI) has higher efficiency than a Current Voltage Source (CSI) due to the less conduction power loss. However, the reverse recovery of the free-wheeling diode limits the efficiency improvement for the silicon devices based hard-switching VSI. The traditional...... quasi-soft-switching inverter can alternate between VSI and CSI by using a proper control scheme and thereby reduce the power losses caused by the reverse recovery of the free-wheeling diode. Nevertheless, slightly extra conduction power loss of the auxiliary switch is also introduced. In order...... to reduce the extra conduction power loss and the voltage stress across the DC-link capacitor, a modified two-level three-phase quasi-soft-switching inverter is proposed by using a SiC MOSFET instead of an IGBT. The principle of the modified two-level three-phase quasi-soft-switching inverter is analyzed...

A quasi-experimental design based on regional variations: discussion of a method for evaluating outcomes of medical practice

DEFF Research Database (Denmark)

Loft, A; Andersen, T F; Madsen, Mette

1989-01-01

A large proportion of common medical practices are subject to substantial regional variation resulting in numerous natural experiments. Opportunities are thereby provided for outcome evaluation through quasi-experimental design. If patients treated in different regions were comparable a natural...... experiment involving alternative treatments could be regarded as 'pseudo randomised', but empirical investigations are needed to verify this prerequisite. This paper discusses the role of quasi-experimental designs in assessment of medical care with evaluation of outcomes after hysterectomy in Denmark...... groups are elicited from administrative data. We conclude that it is possible to establish a quasi-experimental design based on regional variations and that the comparability of the groups included may be assessed through registry data. The importance of technology diffusion for the prospects...

Evaluations of health promoting schools: a review of nine studies.

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Mũkoma, Wanjirũ; Flisher, Alan J

2004-09-01

The concept of 'health promoting schools' has been embraced internationally as an effective way of promoting the health of children, adolescents, and the wider school community. It is only recently that attempts have been made to evaluate health promoting schools. This paper reviews evaluations of health promoting schools and draws useful evaluation methodology lessons. The review is confined to school-based interventions that are founded explicitly on the concept of the health promoting school and employ the concept beyond one school domain. We included nine evaluations in this review. Seven of these were published in the peer reviewed scientific literature. Two were unpublished reports. One study was a randomized controlled trial, while a quasi-experimental research design with comparison schools was used in three studies. With three exceptions, combinations of quantitative and qualitative data were collected. There was evidence that the health promoting school has some influence on various domains of health for the school community. It is also possible to integrate health promotion into the school curriculum and policies successfully. However, the evaluation of health promoting schools is complex. We discuss some of the methodological challenges of evaluating health promoting schools and make suggestions for improving future evaluations.

Effects of Aggression Replacement Training on Problem Solving, Anger and Aggressive Behaviour among Adolescents with Criminal Attempts in Turkey: A Quasi-Experimental Study.

Science.gov (United States)

Kaya, Fadime; Buzlu, Sevim

2016-12-01

The research was conducted by a pretest and post-test conducted in a quasi-experimental design which aimed to determine effectiveness of Aggression Replacement Training (ART) on problem solving, anger and aggressive behaviour among adolescents with criminal attempts in Turkey. The study included 65 adolescents with criminal attempts (32 intervention, 33 control). There was no difference between the groups in terms of average age (16.13±1.10 in the experimental group and 16.21±0.89 in the control group). After the intervention, the experimental group showed significantly decreased Trait Anger levels (t=1.906; P=0.033), increased Anger Control scores (t=2.522; P=0.008), decreased Physical Aggression scores (t=1.925; P=0.031), decreased Hostility scores (t=2.496; P=0.009), increased Social Problem Solving total scores (t=2.937; P=0.005). Increased Anger Control scores were found to be significant when compared with the control group (t=2.273, P=0.026). These results showed that ART was effective on problem solving, anger and aggressive behaviour and can be used to develop positive behaviours among adolescents with criminal attempts. Copyright © 2016 Elsevier Inc. All rights reserved.

Effect of an antismoking advertisement on cinema patrons' perception of smoking and intention to smoke: a quasi-experimental study.

Science.gov (United States)

Hanewinkel, Reiner; Isensee, Barbara; Sargent, James D; Morgenstern, Matthis

2010-07-01

To assess the effect of an antismoking advertisement under real-world conditions. Design Quasi-experimental study. Multiplex cinema in Kiel, Germany; 4073 patrons were surveyed after having viewed a movie. Some 4005 patrons were > or = 10 years old (28.7% between 10 and 17 years). A total of 654 subjects (16.3%) were smokers. In the intervention condition (weeks 1 and 3), a 30-second antismoking advertisement-accentuating long-term health consequences of smoking and promoting cessation-was shown prior to all movies; in the control condition (weeks 2 and 4) no such spot was shown. (i) Awareness of smoking in the movie, (ii) approval of smoking in the movie, (iii) attitude towards smoking, (iv) intention to smoke in the future and (v) desire to smoke among smokers. Findings Patrons who were exposed to the antismoking advertisement were more likely to be female, but did not differ with respect to smoking status. After controlling for gender differences, patrons exposed to the antismoking advertisement had (i) higher awareness of smoking in the movies, (ii) lower levels of approval of smoking in the movies, and (iii) a more negative attitude towards smoking in general compared with those not exposed. Among smokers, smoking in the movies increased urge to smoke, but there was no interaction between smoking in the movies and experimental condition. Study results suggest that placing an antismoking advertisement before movies can affect attitudes towards smoking, bolstering evidence in support of such policies.

[Five steps to decreasing nosocomial infections in large immature premature infants: A quasi-experimental study].

Science.gov (United States)

García González, Ana; Leante Castellanos, José Luis; Fuentes Gutiérrez, Carmen; Lloreda García, José María; Fernández Fructuoso, José Ramón; Gómez Santos, Elisabet; García González, Verónica

2017-07-01

An evaluation is made of the impact of a series of five interventions on the incidence of hospital-related infections in a level iii neonatal unit. Quasi-experimental, pre-post intervention study, which included preterm infants weighing 1,500g at birth or delivered at <32 weeks gestation, admitted in the 12 months before and after the measures were implemented (January 2014). The measures consisted of: optimising hand washing, following a protocol for insertion and handling of central intravenous catheters, encouraging breastfeeding; applying a protocol for rational antibiotic use, and establishing a surveillance system for multi-resistant bacteria. The primary endpoint was to assess the incidence of hospital-acquired infections before and after implementing the interventions. Thirty-three matched patients were included in each period. There was an incidence of 8.7 and 2.7 hospital-related infections/1,000 hospital stay days in the pre- and post-intervention periods, respectively (P<.05). Additionally, patients in the treatment group showed a statistically-significant decrease in days on mechanical ventilation, use of blood products, and vasoactive drugs. The strategy, based on implementing five specific measures in a unit with a high rate of hospital-related infections, proved effective in reducing their incidence. This reduction could contribute to lowering the use of mechanical ventilation, blood products, and vasoactive drugs. Copyright © 2016 Asociación Española de Pediatría. Publicado por Elsevier España, S.L.U. All rights reserved.

Impact of Cost-Sharing Increases on Continuity of Specialty Drug Use: A Quasi-Experimental Study.

Science.gov (United States)

Li, Pengxiang; Hu, Tianyan; Yu, Xinyan; Chahin, Salim; Dahodwala, Nabila; Blum, Marissa; Pettit, Amy R; Doshi, Jalpa A

2017-07-24

To examine the impact of cost-sharing increases on continuity of specialty drug use in Medicare beneficiaries with multiple sclerosis (MS) or rheumatoid arthritis (RA). Five percent Medicare claims data (2007-2010). Quasi-experimental study examining changes in specialty drug use among a group of Medicare Part D beneficiaries without low-income subsidies (non-LIS) as they transitioned from a 5 percent cost-sharing preperiod to a ≥25 percent cost-sharing postperiod, as compared to changes among a disease-matched contemporaneous control group of patients eligible for full low-income subsidies (LIS), who faced minor cost sharing (≤$6.30 copayment) in both the pre- and postperiods. Key variables were extracted from Medicare data. Relative to the LIS group, the non-LIS group had a greater increase in incidence of 30-day continuous gaps in any Part D treatment from the lower cost-sharing period to the higher cost-sharing period (MS, absolute increase = 10.1 percent, OR = 1.61, 95% CI 1.19-2.17; RA, absolute increase = 21.9 percent, OR = 2.75, 95% CI 2.15-3.51). The increase in Part D treatment gaps was not offset by increased Part B specialty drug use. Cost-sharing increases due to specialty tier-level cost sharing were associated with interruptions in MS and RA specialty drug treatments. © Health Research and Educational Trust.

The Effectiveness of Assertiveness Training on the Levels of Stress, Anxiety, and Depression of High School Students.

Science.gov (United States)

Eslami, Ahmad Ali; Rabiei, Leili; Afzali, Seyed Mohammad; Hamidizadeh, Saeed; Masoudi, Reza

2016-01-01

Adolescence is a transition period from childhood to early adulthood. Because of the immense pressure imposed on adolescents due to the complications and ambiguities of this transition, their level of excitement increases and sometimes it appears in the form of sensitivity and intense excitement. This study aimed at determining the effectiveness of assertiveness training on the levels of stress, anxiety, and depression of high school students. This quasi-experimental study was conducted on high school students of Isfahan in academic year 2012 - 13. A total of 126 second grade high school students were collected according to simple random sampling method and divided into two groups: experimental with 63 participants and control with the same number. Data gathering instruments included a demographic questionnaire, Gambill-Richey assertiveness scale, and depression anxiety stress scales (DASS-21). Assertiveness training was carried out on the experimental group in 8 sessions; after 8 weeks, posttest was carried out on both groups. Statistical tests such as independent t test, repeated measures ANOVA, Chi-square test, and the Mann-Whitney test were used to interpret and analyze the data. The Chi-square and Mann-Whitney tests did not show significant statistical differences between the two groups in terms of demographic variables (P ≥ 0.05). Repeated measures ANOVA showed no significant difference between the mean scores for assertiveness before (100.23 ± 7.37), immediately after (101.57 ± 16.06), and 2 months after (100.77 ± 12.50) the intervention in the control group. However, the same test found a significant difference between the mean score for assertiveness in the experimental group before (101.6 ± 9.1), immediately after (96.47 ± 10.84), and 2 months after (95.41 ± 8.37) implementing the training program (P = 0.002). The independent t test showed no significant difference in the mean score for anxiety and stress between two groups before the

Quasi-experimental taxation elasticities of US gasoline demand

International Nuclear Information System (INIS)

Goel, R.K.

1994-01-01

Taxation elasticities provide inputs in public policy aimed at raising revenues. Using the quasi-experimental method, this paper calculates gasoline taxation elasticities for the USA over 1952-86. The medium (mean) elasticity over this period is found to be -0.075 (-0.122). However, the elasticity following the oil shock of 1973 is found to be statistically different from the pre-shock elasticity. Reasons for this change in elasticity are discussed. The implication of this analysis is that tax policies based on price elasticities, rather than on tax elasticities, might be using an inappropriate elasticity estimate and consequently misinterpreting the government's ability to raise tax revenues. (author)

Intervention on whole grain with healthy balanced diet to manage childhood obesity (GReat-Child™trial): study protocol for a quasi-experimental trial.

Science.gov (United States)

Koo, H C; Poh, B K; Ruzita, Abd Talib

2016-01-01

The rapid increase in childhood obesity is a serious public health problem, and has led to the development of many interventions. However, no intervention has emphasized whole grains as a strategy to manage childhood obesity. Therefore, this article describes the protocol of a 12-week multi-component, family-based intervention on whole grain, using a healthy balanced diet for managing childhood obesity. The GReat-Child trial utilize a quasi-experimental method in which two schools in Kuala Lumpur are assigned to intervention and control groups. The eligibility criteria are overweight/obese children, aged 9 through 11 years, who has no serious co-morbidities. The children who report consuming whole-grain foods in their 3-day diet-recall during the screening will be excluded. The study sample is characterized by anthropometric measurements (weight, height, percentage of body fat and waist circumference), whole grain and nutrient intakes (3-day 24-h diet recalls), and their knowledge, attitudes and practices towards whole grain. The 12-week intervention is comprised of three components addressing behaviour, personal and environmental factors, based on social cognitive theory: (1) individual diet counselling for the parents; (2) six 30-min nutrition education classes and (3) school delivery of whole-grain foods; The control school does not receive any interventions, however, for ethical purposes, a health talk is conducted after the entire GReat-Child Trial is completed. The GReat-Child trial represents a novel approach to examining the effectiveness of the intervention of whole grain in a healthy balanced diet on managing childhood obesity. We anticipate that this trial will reveal not only whether whole grain intervention will be effective in managing childhood obesity, but also provide greater insights into the acceptance of whole grain among Malaysian children.

Contribution to the experimental study of excited states of 58,60,62,64Ni

International Nuclear Information System (INIS)

Beuzit, Pierre

1971-01-01

In its experimental part, this research thesis addresses the use of nuclear spectrometry to study electromagnetic properties of excited states of 58,60,62,64 Ni by using coincidence measurements of particles scattered by the nucleus, and of γ lines emitted by the nucleus in reaction. The author also computed energies, wave functions and transition probabilities of levels related to the quasi-particle model according the RPA (random phase approximation) approximation. After a description of the experimental device and a presentation of data reduction methods, the author reports the experimental results. Then, after a recall of theoretical models and calculation approximations, the author discusses the calculated results obtained within the framework of the layer model, and presents those obtained by using the quasi-particle model with the RPA approximation. By using experimental results, a level classification is proposed. The importance of the core configuration and of the proton-neutron interaction is highlighted

Standardised simulation-based emergency and intensive care nursing curriculum to improve nursing students' performance during simulated resuscitation: A quasi-experimental study.

Science.gov (United States)

Chen, Jie; Yang, Jian; Hu, Fen; Yu, Si-Hong; Yang, Bing-Xiang; Liu, Qian; Zhu, Xiao-Ping

2018-03-14

Simulation-based curriculum has been demonstrated as crucial to nursing education in the development of students' critical thinking and complex clinical skills during a resuscitation simulation. Few studies have comprehensively examined the effectiveness of a standardised simulation-based emergency and intensive care nursing curriculum on the performance of students in a resuscitation simulation. To evaluate the impact of a standardised simulation-based emergency and intensive care nursing curriculum on nursing students' response time in a resuscitation simulation. Two-group, non-randomised quasi-experimental design. A simulation centre in a Chinese University School of Nursing. Third-year nursing students (N = 39) in the Emergency and Intensive Care course were divided into a control group (CG, n = 20) and an experimental group (EG, n = 19). The experimental group participated in a standardised high-technology, simulation-based emergency and intensive care nursing curriculum. The standardised simulation-based curriculum for third-year nursing students consists of three modules: disaster response, emergency care, and intensive care, which include clinical priorities (e.g. triage), basic resuscitation skills, airway/breathing management, circulation management and team work with eighteen lecture hours, six skill-practice hours and twelve simulation hours. The control group took part in the traditional curriculum. This course included the same three modules with thirty-four lecture hours and two skill-practice hours (trauma). Perceived benefits included decreased median (interquartile ranges, IQR) seconds to start compressions [CG 32 (25-75) vs. EG 20 (18-38); p  0.05] and defibrillation [CG 222 (194-254) vs. EG 221 (214-248); p > 0.05] at the beginning of the course. A simulation-based emergency and intensive care nursing curriculum was created and well received by third-year nursing students and associated with decreased response time in a

Effects of using mobile device-based academic electronic medical records for clinical practicum by undergraduate nursing students: A quasi-experimental study.

Science.gov (United States)

Choi, Mona; Lee, HyeongSuk; Park, Joon Ho

2018-02-01

The academic electronic medical record (AEMR) system is applied with the expectation that nursing students will be able to attain competence in healthcare decision-making and nursing informatics competencies. However, there is insufficient evidence regarding the advantage of applying mobile devices to clinical practicum. This study aimed to examine the effect of an experiment that introduced a mobile AEMR application for undergraduate nursing students in their practicum. A quasi-experimental design was used. The subjects were 75 third-year nursing students enrolled in clinical practicum and were divided into an experimental (practicum with AEMR) and a control (conventional practicum) group. Nursing informatics competencies, critical thinking disposition, and satisfaction with clinical practicum were measured before and after the clinical practicum for each group. The usability of the AEMR application was also examined for the experimental group after the experiment. After the experiment, the experimental group showed a significant increase in the informatics knowledge domain of nursing informatics competencies in the post-test. The difference in critical thinking between the experimental and control groups was not statistically significant. Regarding satisfaction with the clinical practicum, the experimental group exhibited a significantly higher level of satisfaction in "preparation of a diagnostic test or laboratory test and understanding of the results" and "nursing intervention and documentation" than the control group. Students who participated in the practicum using the AEMR application considered it useful. The AEMR application was an effective educational method for practicing the immediate documentation of students' observations and interventions and was available at the patients' bedsides. To improve critical thinking, it is necessary to apply a variety of approaches when solving clinical problems. Copyright © 2017 Elsevier Ltd. All rights reserved.

Improving self-regulated learning junior high school students through computer-based learning

Science.gov (United States)

Nurjanah; Dahlan, J. A.

2018-05-01

This study is back grounded by the importance of self-regulated learning as an affective aspect that determines the success of students in learning mathematics. The purpose of this research is to see how the improvement of junior high school students' self-regulated learning through computer based learning is reviewed in whole and school level. This research used a quasi-experimental research method. This is because individual sample subjects are not randomly selected. The research design used is Pretest-and-Posttest Control Group Design. Subjects in this study were students of grade VIII junior high school in Bandung taken from high school (A) and middle school (B). The results of this study showed that the increase of the students' self-regulated learning who obtain learning with computer-based learning is higher than students who obtain conventional learning. School-level factors have a significant effect on increasing of the students' self-regulated learning.

Impact of Employee Assistance Services on Depression, Anxiety, and Risky Alcohol Use: A Quasi-Experimental Study.

Science.gov (United States)

Richmond, Melissa K; Pampel, Fred C; Wood, Randi C; Nunes, Ana P

2016-07-01

To test the impact of Employee Assistance Programs (EAPs) on reducing employee depression, anxiety, and risky alcohol use, and whether improvements in clinical symptoms lead to improved work outcomes. The study used a prospective, quasi-experimental design with propensity score matching. Participants (n = 344) came from 20 areas of state government. EAP (n = 156) and non-EAP (n = 188) employees were matched on baseline demographic, psychosocial, and work-related characteristics that differentiate EAP from non-EAP users. Follow-up surveys were collected 2 to 12 months later (M = 6.0). EAP significantly reduced symptoms of depression and anxiety, but not at-risk alcohol use. EAP reductions in depression and anxiety mediated EAP-based reductions in absenteeism and presenteeism. EAPs provide easy-to-access work-based services that are effective at improving employee mental health.

School programs targeting stress management in children and adolescence: a meta-analysis

NARCIS (Netherlands)

Kraag, G.C; Zeegers, M.P.; Kok, G.J.; Hosman, C.M.H.; Huijer Abu-Saad, H.

2006-01-01

Introduction This meta-analysis evaluates the effect of school programs targeting stress management or coping skills in school children. Methods Articles were selected through a systematic literature search. Only randomized controlled trials or quasi-experimental studies were included. The

The Effectiveness of Health Education on Maternal Anxiety, Circumcision Knowledge, and Nursing Hours: A Quasi-Experimental Study.

Science.gov (United States)

Chang, Shu-Fang; Hung, Chich-Hsiu; Hsu, Yu-Yun; Liu, Yi; Wang, Tsu-Nai

2017-08-01

Many studies have shown that providing health education before surgery may significantly increase health knowledge and decrease anxiety in both patients and their family members. However, few studies have compared the effects on pediatric outpatient surgery outcomes of different health education instruction modes. This study compares the effects of two health education delivery modes on maternal knowledge and anxiety, the number of unexpected early hospital follow-up visits, and the time spent by nurses on health education. A quasi-experimental design with pretest and posttest was used to compare the effect on the outcomes of pediatric circumcision of a multimedia compact disc (CD) and a printed material.Seventy mothers of children who underwent Plastibell circumcision participated in this study. Both the printed material and the multimedia CD significantly increased the knowledge and reduced the anxiety levels of the participants. However, no significant differences in unscheduled early hospital follow-up visits postsurgery were found between the two modes of instruction. Furthermore, we found that significantly fewer hours were spent by nurses on health education for the multimedia CD group in comparison with the printed material group. In the current clinical environment of common staffing shortages, information tools may be used to cost-effectively assist and simplify nursing work. The findings of this study may provide a reference to medical centers that are working to reduce the time spent by nurses on health education for outpatient surgery patients. Furthermore, audiovisual health education tools are recommended to increase nursing effectiveness and save nursing time.

Exploring science teachers' perceptions of experimentation: implications for restructuring school practical work

Science.gov (United States)

Wei, Bing; Li, Xiaoxiao

2017-09-01

It is commonly recognised that practical work has a distinctive and central role in science teaching and learning. Although a large number of studies have addressed the definitions, typologies, and purposes of practical work, few have consulted practicing science teachers. This study explored science teachers' perceptions of experimentation for the purpose of restructuring school practical work in view of science practice. Qualitative interviews were conducted with 87 science teachers at the secondary school level. In the interviews, science teachers were asked to make a comparison between students' experiments and scientific experiments. Eight dimensions of experimentation were generated from the qualitative data analysis, and the distributions of these eight dimensions between the two types of experiments were compared and analysed. An ideal model of practical work was suggested for restructuring practical work at the secondary school level, and some issues related to the effective enactment of practical work were discussed.

Exploring “Speak-O-Rama” as a Public Speaking Module: A Pilot Study in an Islamic Integrated Primary School

Directory of Open Access Journals (Sweden)

Nurul Iman Ahmad Bukhari

2017-01-01

Full Text Available This paper describes the pilot study in implementing a public speaking module for a primary school level. The module development was structured according to ASSURE Model with the Communicative Language Teaching (CLT as the basis used in designing the module activities.  One group of Year 4 students from an Islamic integrated school was selected and the research method employed was the quasi-experimental research with pre and post-tests as well as interviews with the English teachers on the students’ performance and self-confidence.  Students were also interviewed to identify their self confidence level before and after the implementation of the public speaking module. This research project is hoped to increase students’ oral proficiency along with increasing self-confidence in public speaking at a young age, and to propose the implementation of this module as reference in primary education.

School Personnel-Student Racial Congruence and the Achievement Gap

Science.gov (United States)

Moore, Allison B.; MacGregor, Cynthia; Cornelius-White, Jeffrey

2017-01-01

Purpose: This paper aims to examine the relationship between student achievement and racial congruence of school personnel and students to help educators and policy makers narrow the achievement gap. Design/methodology/approach: This quasi-experimental, correlational study used publicly available data from 158 elementary schools in the Houston…

Efficacy of empathy training in nursing students: A quasi-experimental study.

Science.gov (United States)

Bas-Sarmiento, Pilar; Fernández-Gutiérrez, Martina; Baena-Baños, María; Romero-Sánchez, Jose Manuel

2017-12-01

Empathy is a competency to be learned by nurses and a therapeutic tool in the helping relationship that has repercussions on the health of both patients and professionals. To determine the efficacy of an experiential training for improving the empathy of nursing students in terms of capacity building, empathic performance and increased learning perception and retention of the material. A quasi-experimental study of a single group with pretest-posttest measurements of the educational intervention and follow-up at one month after the training. Faculty of Nursing, University of Cádiz, Spain. Forty-eight second-year undergraduate university nursing students. The educational intervention was conducted during a single semester, with 20h of training. The methodology of role-playing, behavior assay, and a flipped classroom was followed. Measurements of student performance were collected before and after the intervention. The Reynolds Empathy Scale was used to evaluate the student's perception of his/her performance; The Consultation and Relational Empathy Measure was used to evaluate the patient's perception of the student's behavior during the simulation; and three independent external observers assessed the student's behavior, guided by The Carkhuff Scale. Descriptive analysis and non-parametric contrast tests were performed to compare the scores before and after the training (Mann-Whitney U and Wilcoxon rank-sum). Spearman's correlation coefficient was used for the correlation between the measurements. The mean scores improved for all of the variables, with the differences being statistically significant. The students assessed their learning positively. The training was shown to be effective for improving the empathy of the university students in the study. The results are promising in terms of the students retaining the competencies adquired. Therefore, this type of experiential training is recommended for empathy training of future health professionals. Copyright �

Empirically Examining the Performance of Approaches to Multi-Level Matching to Study the Effect of School-Level Interventions

Science.gov (United States)

Hallberg, Kelly; Cook, Thomas D.; Figlio, David

2013-01-01

The goal of this paper is to provide guidance for applied education researchers in using multi-level data to study the effects of interventions implemented at the school level. Two primary approaches are currently employed in observational studies of the effect of school-level interventions. One approach employs intact school matching: matching…

Providing guidance in virtual lab experimentation : the case of an experiment design tool

NARCIS (Netherlands)

Efstathiou, Charalampos; Hovardas, Tasos; Xenofontos, Nikoletta A.; Zacharia, Zacharias C.; de Jong, Ton A.J.M.; Anjewierden, Anjo; van Riesen, Siswa A.N.

2018-01-01

The present study employed a quasi-experimental design to assess a computer-based tool, which was intended to scaffold the task of designing experiments when using a virtual lab for the process of experimentation. In particular, we assessed the impact of this tool on primary school students’

A Quasi-Experimental Examination: Cognitive Sequencing of Instruction Using Experiential Learning Theory for STEM Concepts in Agricultural Education

Science.gov (United States)

Smith, Kasee L.; Rayfield, John

2017-01-01

Understanding methods for effectively instructing STEM education concepts is essential in the current climate of education (Freeman, Marginson, & Tyler 2014). Kolb's experiential learning theory (ELT) outlines four specific modes of learning, based on preferences for grasping and transforming information. This quasi-experimental study was…

Are children participating in a quasi-experimental education outside the classroom intervention more physically active?

OpenAIRE

Schneller, Mikkel Bo; Duncan, Scott; Schipperijn, Jasper; Nielsen, Glen; Mygind, Erik; Bentsen, Peter

2017-01-01

BACKGROUND: Education outside the classroom (EOtC) is a curriculum-based approach to teaching that has shown positive associations with children's physical activity and academic learning in small-scale case studies. The purpose of this large-scale quasi-experimental study was to determine if children who participate regularly in EOtC spend more time being physically active than children who do not.METHODS: In the 2014/2015 study TEACHOUT, classes were recruited in pairs such that each EOtC cl...

Bringing Fun and Meaning into Grammar Learning: A Case Study of a Secondary-Level EFL Class in Hong Kong

Science.gov (United States)

Hua, Congchao; Li, Bin

2015-01-01

Popular culture materials are generally believed to have positive effects on L2 learning. This study examined the effectiveness of popular culture materials in enhancing Hong Kong EFL students' grammar learning. In a quasi-experimental design, 20 secondary school students were taught grammar in two ways: with the use of popular culture materials,…

Effect of whey guava beverage supplementation on haemoglobin level of school going children

Directory of Open Access Journals (Sweden)

Divya .

2014-12-01

Full Text Available Introduction: Iron deficiency is estimated to affect one-half of the school going children in developing countries and school years are opportune time to intervene. Rationale: No coherent, co-ordinate and effective health services are available in the country for below 16 years. So attempt was made to know real scenario of iron deficiency. Objectives: To assess the effect of whey guava beverage supplementation on the haemoglobin level of school going children. Methodology:  An experimental research design was taken to conduct the study in which 200 children of 6≥and7≥ years in low socio economic status of both the genders were taken. For hemoglobin testing Sahil’s hemoglobinometer was used. Each child in experimental group was given 200ml of whey guava beverage for 90 days except holidays. Results and Discussion: The initial mean Hb levels of 6≥and7≥ year’s old boys and girls of control groups and experimental groups were ranging from 9.50 to 10.24 which were 79.17% to 85.33%. The results revealed that almost all the respondents were anaemic. After 90 days of feeding supplement the final mean Hb levels of 6≥7 years old boys and girls of control group  ranged from 10.10 to 10.65 which was 84.17% to 88.75%. Whereas in experimental group it ranged from 11.06 to 11.42 which were 91.92% to 95.17%. The study clearly evidences that the respondents in experimental group had improved with more Hb levels when compared to control group. Also children who were suffering from anaemia in experimental group became normal. Conclusion: Distribution of whey guava beverage through school feeding program may prove as an outstanding strategy to combat iron deficiency in school children.

School Nurses' Role in Asthma Management, School Absenteeism, and Cost Savings: A Demonstration Project

Science.gov (United States)

Rodriguez, Eunice; Rivera, Diana Austria; Perlroth, Daniella; Becker, Edmund; Wang, Nancy Ewen; Landau, Melinda

2013-01-01

Background: With increasing budget cuts to education and social services, rigorous evaluation needs to document school nurses' impact on student health, academic outcomes, and district funding. Methods: Utilizing a quasi-experimental design, we evaluated outcomes in 4 schools with added full-time nurses and 5 matched schools with part-time nurses…

Experimental validation of Villain's conjecture about magnetic ordering in quasi-1D helimagnets

International Nuclear Information System (INIS)

Cinti, F.; Rettori, A.; Pini, M.G.; Mariani, M.; Micotti, E.; Lascialfari, A.; Papinutto, N.; Amato, A.; Caneschi, A.; Gatteschi, D.; Affronte, M.

2010-01-01

Low-temperature magnetic susceptibility, zero-field muon spin resonance and specific heat measurements have been performed in the quasi-one-dimensional (1D) molecular helimagnetic compound Gd(hfac) 3 NITEt. The specific heat presents two anomalies at T 0 =2.19(2)K and T N =1.88(2)K, while susceptibility and zero-field muon spin resonance show anomalies only at T N =1.88(2)K. The results suggest an experimental validation of Villain's conjecture of a two-step magnetic ordering in quasi-1D XY helimagnets: the paramagnetic phase and the helical spin solid phases are separated by a chiral spin liquid, where translational invariance is broken without violation of rotational invariance.

The Effect of Three Levels of Inquiry on the Improvement of Science Concept Understanding of Elementary School Teacher Candidates

Science.gov (United States)

Artayasa, I. Putu; Susilo, Herawati; Lestari, Umie; Indriwati, Sri Endah

2018-01-01

This research aims to compare the effect of the implementation of three levels of inquiry: level 2 (structured inquiry), level 3 (guided inquiry), and level 4 (open inquiry) toward science concept understanding of elementary school teacher candidates. This is a quasi experiment research with pre-test post-test nonequivalent control group design.…

The American School in the Political Socialization Process.

Science.gov (United States)

Ehman, Lee H.

1980-01-01

Studies on the effects of schooling on the political socialization of American youth are reviewed. School-level and classroom-level attributes are related to four political socialization outcomes: political knowledge; political attitudes and values; attitudes toward political participation; and participation in political or quasi-political…

'I've Changed My Mind', Mindfulness-Based Childbirth and Parenting (MBCP) for pregnant women with a high level of fear of childbirth and their partners: study protocol of the quasi-experimental controlled trial.

Science.gov (United States)

Veringa, Irena K; de Bruin, Esther I; Bardacke, Nancy; Duncan, Larissa G; van Steensel, Francisca J A; Dirksen, Carmen D; Bögels, Susan M

2016-11-07

Approximately 25 % of pregnant women suffer from a high level of Fear of Childbirth (FoC), as assessed by the Wijma Delivery Expectancy Questionnaire (W-DEQ-A, score ≥66). FoC negatively affects pregnant women's mental health and adaptation to the perinatal period. Mindfulness-Based Childbirth and Parenting (MBCP) seems to be potentially effective in decreasing pregnancy-related anxiety and stress. We propose a theoretical model of Avoidance and Participation in Pregnancy, Birth and the Postpartum Period in order to explore FoC and to evaluate the underlying mechanisms of change of MBCP. The 'I've Changed My Mind' study is a quasi-experimental controlled trial among 128 pregnant women (week 16-26) with a high level of FoC, and their partners. Women will be allocated to MBCP (intervention group) or to Fear of Childbirth Consultation (FoCC; comparison group). Primary outcomes are FoC, labour pain, and willingness to accept obstetrical interventions. Secondary outcomes are anxiety, depression, general stress, parental stress, quality of life, sleep quality, fatigue, satisfaction with childbirth, birth outcome, breastfeeding self-efficacy and cost-effectiveness. The total study duration for women is six months with four assessment waves: pre- and post-intervention, following the birth and closing the maternity leave period. Given the high prevalence and severe negative impact of FoC this study can be of major importance if statistically and clinically meaningful benefits are found. Among the strengths of this study are the clinical-based experimental design, the extensive cognitive-emotional and behavioural measurements in pregnant women and their partners during the entire perinatal period, and the representativeness of study sample as well as generalizability of the study's results. The complex and innovative measurements of FoC in this study are an important strength in clinical research on FoC not only in pregnant women but also in their partners. Dutch Trial

Effectiveness of the use of question-driven levels of inquiry based instruction (QD-LOIBI) assisted visual multimedia supported teaching material on enhancing scientific explanation ability senior high school students

Science.gov (United States)

Suhandi, A.; Muslim; Samsudin, A.; Hermita, N.; Supriyatman

2018-05-01

In this study, the effectiveness of the use of Question-Driven Levels of Inquiry Based Instruction (QD-LOIBI) assisted visual multimedia supported teaching materials on enhancing senior high school students scientific explanation ability has been studied. QD-LOIBI was designed by following five-levels of inquiry proposed by Wenning. Visual multimedia used in teaching materials included image (photo), virtual simulation and video phenomena. QD-LOIBI assisted teaching materials supported by visual multimedia were tried out on senior high school students at one high school in one district in West Java. A quasi-experiment method with design one experiment group (n = 31) and one control group (n = 32) were used. Experimental group were given QD-LOIBI assisted teaching material supported by visual multimedia, whereas the control group were given QD-LOIBI assisted teaching materials not supported visual multimedia. Data on the ability of scientific explanation in both groups were collected by scientific explanation ability test in essay form concerning kinetic gas theory concept. The results showed that the number of students in the experimental class that has increased the category and quality of scientific explanation is greater than in the control class. These results indicate that the use of multimedia supported instructional materials developed for implementation of QD-LOIBI can improve students’ ability to provide explanations supported by scientific evidence gained from practicum activities and applicable concepts, laws, principles or theories.

A quasi-3-dimensional simulation method for a high-voltage level-shifting circuit structure

International Nuclear Information System (INIS)

Liu Jizhi; Chen Xingbi

2009-01-01

A new quasi-three-dimensional (quasi-3D) numeric simulation method for a high-voltage level-shifting circuit structure is proposed. The performances of the 3D structure are analyzed by combining some 2D device structures; the 2D devices are in two planes perpendicular to each other and to the surface of the semiconductor. In comparison with Davinci, the full 3D device simulation tool, the quasi-3D simulation method can give results for the potential and current distribution of the 3D high-voltage level-shifting circuit structure with appropriate accuracy and the total CPU time for simulation is significantly reduced. The quasi-3D simulation technique can be used in many cases with advantages such as saving computing time, making no demands on the high-end computer terminals, and being easy to operate. (semiconductor integrated circuits)

A quasi-3-dimensional simulation method for a high-voltage level-shifting circuit structure

Energy Technology Data Exchange (ETDEWEB)

Liu Jizhi; Chen Xingbi, E-mail: jzhliu@uestc.edu.c [State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)

2009-12-15

A new quasi-three-dimensional (quasi-3D) numeric simulation method for a high-voltage level-shifting circuit structure is proposed. The performances of the 3D structure are analyzed by combining some 2D device structures; the 2D devices are in two planes perpendicular to each other and to the surface of the semiconductor. In comparison with Davinci, the full 3D device simulation tool, the quasi-3D simulation method can give results for the potential and current distribution of the 3D high-voltage level-shifting circuit structure with appropriate accuracy and the total CPU time for simulation is significantly reduced. The quasi-3D simulation technique can be used in many cases with advantages such as saving computing time, making no demands on the high-end computer terminals, and being easy to operate. (semiconductor integrated circuits)

The Experimental Art School

DEFF Research Database (Denmark)

Ørum, Tania

2014-01-01

The article describes the Experimental Art School from its early beginnings, its development from formal experiments to political action, the question of gender and politics, and the power of the self-organised......The article describes the Experimental Art School from its early beginnings, its development from formal experiments to political action, the question of gender and politics, and the power of the self-organised...

Using the Montessori approach for a clientele with cognitive impairments: a quasi-experimental study design.

Science.gov (United States)

Giroux, Dominique; Robichaud, Line; Paradis, Martin

2010-01-01

The choice of activities responding to the needs of people with moderate to severe dementia is a growing concern for care providers trying to target the need for a feeling of self-accomplishment by adapting activities to the abilities of elderly patients. The activities created by Maria Montessori seem to be adaptable to this clientele. This study evaluates the short-term effects, as compared to regular activities offered in the milieu. This is a quasi-experimental study where each of the 14 participants was observed and filmed in two conditions: during Montessori activities, during regular activities, and one control condition (no activity). The results show that Montessori activities have a significant effect on affect and on participation in the activity. They support the hypothesis that when activities correspond to the needs and abilities of a person with dementia, these positive effects are also observed on behaviours. This study enabled its authors to corroborate the findings presented in the literature and to contribute additional elements on the positive effects of the use of Montessori activities and philosophy. Used with people with moderate to severe dementia these allow the satisfaction of their basic psychological needs, their well being, and hence, on their quality of life.

Placebo-controlled trial of nebulization with adrenaline in acute bronchiolitis: a quasi-experimental study

International Nuclear Information System (INIS)

Afzal, M.F.; Iqbal, S.M.; Sultan, M.A.

2012-01-01

Background: Bronchiolitis is an acute inflammatory obstruction. of small In children that occurs In first two years of life and is by fever, rhinitis, cough, tachypnoea, expiratory wheeze and increased respiratory effort To study efficacy of nebulized adrenaline compared with placebo in acute bronchiolitis. Quasi-experimental study carried out at Department of aediatrics, King Edward Medical University/ Mayo Hospital, Lahore from October 2006 through March 2007. After consent from parents, sixty children of age between 2 months to 2 years with the first episode consistent with clinical case definition of bronchiolitis were included by using convenient sampling. clinical scoring system was used to grade the severity of disease as well as to monitor the efficacy of intervention. Those having score = 8 were randomly allocated to the two study groups. The information was recorded at 0 minute and effect of each method of treatment was followed for 90 minutes. Results: Our study population was 60 children. The mean age was 11:1:6 Months. Male to female ratio was 1.2: 1. Mean weight of the Children was 9:1:3 kg. Improvement in clinical score, oxygen saturation, and length of hospital at 0 and 90 minutes was noted in both groups but when compared with placebo, there was no Statistically significant difference. Conclusion: There is no difference in the efficacy of nebulization with adrenaline compared with placebo in the management of acute bronchiolitis. (author)

Gender roles, physical and sexual violence prevention in primary extend to secondary school in Samutsakorn Province, Thailand.

Science.gov (United States)

Chamroonsawasdi, Kanittha; Suparp, Jarueyporn; Kittipichai, Wirin; Khajornchaikul, Piyathida

2010-03-01

To enhance positive attitude and life skills on gender roles to prevent physical and sexual violence. A whole school-based participatory learning program using a quasi-experimental study with pre and post test design was conducted among 2 schools during June-September, 2005. The experimental group, were 134 students in a primary school and 179 students in a secondary school. While the control group, were 122 students in a primary school and 95 students in a secondary school. Means score of attitude toward gender roles before implementation in the experimental group was significantly lower than the control group (p 0.05). Means paired different score (after-before) between the two groups was significantly different (p = 0.002). A whole school-based program on gender roles and violence prevention is suitable for youths and should be merged as school curricula and expanded as a nationwide program at all level of education. Gender equity should be taught at an early childhood. Parental involvement in school-based activities should be negotiated.

Effect of 6-month community-based exercise interventions on gait and functional fitness of an older population: a quasi-experimental study.

Science.gov (United States)

Ramalho, Fátima; Santos-Rocha, Rita; Branco, Marco; Moniz-Pereira, Vera; André, Helô-Isa; Veloso, António P; Carnide, Filomena

2018-01-01

Gait ability in older adults has been associated with independent living, increased survival rates, fall prevention, and quality of life. There are inconsistent findings regarding the effects of exercise interventions in the maintenance of gait parameters. The aim of the study was to analyze the effects of a community-based periodized exercise intervention on the improvement of gait parameters and functional fitness in an older adult group compared with a non-periodized program. A quasi-experimental study with follow-up was performed in a periodized exercise group (N=15) and in a non-periodized exercise group (N=13). The primary outcomes were plantar pressure gait parameters, and the secondary outcomes were physical activity, aerobic endurance, lower limb strength, agility, and balance. These variables were recorded at baseline and after 6 months of intervention. Both programs were tailored to older adults' functional fitness level and proved to be effective in reducing the age-related decline regarding functional fitness and gait parameters. Gait parameters were sensitive to both the exercise interventions. These exercise protocols can be used by exercise professionals in prescribing community exercise programs, as well as by health professionals in promoting active aging.

Effect of a resistance exercise program for sarcopenic elderly women: quasi-experimental study

Directory of Open Access Journals (Sweden)

Joana Ude Viana

2018-04-01

Full Text Available Abstract Introduction: Resistance training is quoted as one of the best pathways to manage sarcopenia and progressive resistance training is supposed to improve muscle mass, strength and performance in older adults. Objective: The aim was to examine the impact of a progressive resistance exercise program (PREP on muscle and function performance in sarcopenic community-dwelling elder women. Methods: Quasi-experimental study (pre - post intervention. Participated 18 sarcopenic community-dwelling elder women (65 years or older. PREP based on 75% of the participant’s maximum load (12/wk, 3 times/wk. Main outcome measures: muscle strength of knee extensors (isokinetic dynamometry, muscle mass (dual-x ray absorptiometry - DXA, functional performance (Short Physical Performance Battery - SPPB. Paired t-test was used to evaluate differences pre and post intervention. Results: Improvements on power (p = 0.01 and peak torque (p = 0.01 were observed when measured by the isokinetic dynamometer at low speed (60º/s. Improvements on DXA (pre PREP: 5.49 kg/m2 vs. post PREP: 6.01 kg/m2; p = 0.03 and SPPB scores (pre PREP: 9.06 vs. post PREP: 10.28; p = 0.01 were also observed. Conclusion: The PREP was able to improve muscle and functional performance in sarcopenic community-dwelling elder women. This program should be considered in clinical practice.

Evidence-based research on the value of school nurses in an urban school system.

Science.gov (United States)

Baisch, Mary J; Lundeen, Sally P; Murphy, M Kathleen

2011-02-01

With the increasing acuity of student health problems, growing rates of poverty among urban families, and widening racial/ethnic health disparities in child and adolescent health indicators, the contributions of school nurses are of increasing interest to policymakers. This study was conducted to evaluate the impact of school nurses on promoting a healthy school environment and healthy, resilient learners. A mixed-methods approach was used for this study. Using a cross-sectional design, surveys captured the level of satisfaction that school staff had with the nurse in their school, as well as their perceptions of the impact of the nurse on the efficient management of student health concerns. Using a quasi-experimental design, data from electronic school records were used to compare rates of immunization and completeness of health records in schools with nurses. This study provides evidence that school nurses positively influenced immunization rates, the accuracy of student health records, and management of student health concerns. This research demonstrates that teachers and other staff consider nurse interventions vital to eliminating barriers to student learning and improving overall school health. A cost analysis revealed the estimated annual cost per school for the time staff spent managing health concerns. In an environment of scarce resources, school boards need quality evaluation data to justify hiring and retaining school nurses to support improved school health environments. © 2011, American School Health Association.

The perception of animal experimentation ethics among Indian teenage school pupils.

Science.gov (United States)

Kim, Justin Namuk; Choi, Eun Hee; Kim, Soo-Ki

2017-03-01

To promote awareness of animal experimentation ethics among teenagers, we created an educational pamphlet and an accompanying questionnaire. One hundred Indian teenage school pupils were given the pamphlet and subsequently surveyed with the questionnaire, to evaluate: a) their perception of animal experimentation ethics; and b) their opinion on the effectiveness of the pamphlet, according to gender and school grade/age. There was a significant correlation between grade/age and support for animal experimentation, i.e. senior students were more inclined to show support for animal experimentation. There was also a significant correlation between gender and perception of the need to learn about animal experimentation ethics, with girls more likely to feel the need to learn about ethics than boys. In addition, the four questions relating to the usefulness of the pamphlet, and student satisfaction with its content, received positive responses from the majority of the students. Even though the pamphlet was concise, it was apparent that three quarters of the students were satisfied with its content. Gender and age did not influence this level of satisfaction. Overall, our study shows that there is a significant correlation between a pupil`s school grade/age and their support for animal experimentation, and that there is also a significant correlation between gender and the perceived need to learn about animal experimentation ethics. This pilot scheme involving an educational pamphlet and questionnaire could be beneficial in helping to formulate basic strategies for educating teenage school pupils about animal ethics. 2017 FRAME.

Situated teaching improves empathy learning of the students in a BSN program: A quasi-experimental study.

Science.gov (United States)

Lee, Kwo-Chen; Yu, Chin-Ching; Hsieh, Pei-Ling; Li, Chin-Ching; Chao, Yann-Fen C

2018-05-01

Empathy is an important clinical skill for nursing students, but it is a characteristic difficult to teach and assess. To evaluate the effect of situated teaching on empathy learning among undergraduate nursing students. A cohort study with pre-post-test quasi-experimental design. The 2nd-year students were enrolled from two BSN programs. The teaching program was completed over 4 months on the basis of experiential learning theory which integrated the following four elements: classroom-based role play, self-reflection, situated learning and acting. The Jefferson Scale of Empathy-Health Profession-Student version was administered before and after the program. Objective Structure Clinical Examination (OSCE) was administered at the end of program and a rubrics scale was used to measure empathy. A generalized estimation equation was used to identify the effect of subjective empathy, and an independent t-test was used for the objective assessment between two groups. A total of 103 students were enrolled. The results showed that subjective empathy increased significantly in experimental group. In the Objective Structured Clinical Examination, examiners and standard patients gave significantly higher empathy scores to the situated teaching group than the control group. The present study indicated that situated teaching can improve empathy learning of the nursing students. However different methods of assessment of empathy produce different results. We therefore recommend that multiple measurements from difference perspectives are preferable in the assessment of empathy. Copyright © 2018 Elsevier Ltd. All rights reserved.

Benefits of smart pumps for automated changeovers of vasoactive drug infusion pumps: a quasi-experimental study.

Science.gov (United States)

Cour, M; Hernu, R; Bénet, T; Robert, J M; Regad, D; Chabert, B; Malatray, A; Conrozier, S; Serra, P; Lassaigne, M; Vanhems, P; Argaud, L

2013-11-01

Manual changeover of vasoactive drug infusion pumps (CVIP) frequently lead to haemodynamic instability. Some of the newest smart pumps allow automated CVIP. The aim of this study was to compare automated CVIP with manual 'Quick Change' relays. We performed a prospective, quasi-experimental study, in a university-affiliated intensive care unit (ICU). All adult patients receiving continuous i.v. infusion of vasoactive drugs were included. CVIP were successively performed manually (Phase 1) and automatically (Phase 2) during two 6-month periods. The primary endpoint was the frequency of haemodynamic incidents related to the relays, which were defined as variations of mean arterial pressure >15 mm Hg or heart rate >15 bpm. The secondary endpoints were the nursing time dedicated to relays and the number of interruptions in care because of CVIP. A multivariate mixed effects logistic regression was fitted for analytic analysis. We studied 1329 relays (Phase 1: 681, Phase 2: 648) from 133 patients (Phase 1: 63, Phase 2: 70). Incidents related to CVIP decreased from 137 (20%) in Phase 1 to 73 (11%) in Phase 2 (Ppumps in limiting the frequency of haemodynamic incidents related to relays and in reducing the nursing workload.

Short-term outcomes of a back school program for chronic low back pain

NARCIS (Netherlands)

Hodselmans, AP; Jaegers, SM; Goeken, LN; Göeken, L.N.

Objective: To assess the short-term outcome of a back school program for patients suffering from chronic, nonspecific low back pain (LBP). Design: Quasi-experimental cohort study with a waiting list control group. Setting: Dutch rehabilitation department. Participants: Experimental group (n = 14)

Creativity of secondary school students: entrepreneurial skills ...

African Journals Online (AJOL)

The study adopted a quasi-experimental design using a pre-test, post-test control design in order to investigate the entrepreneurial skills and creative abilities of secondary school students in Physics. The study was carried out in Obio/Akpo Local Government Area of Rivers State of Nigeria, using purposive sampling ...

System studies for quasi-steady-state advanced physics tokamak

International Nuclear Information System (INIS)

Reid, R.L.; Peng, Y.K.M.

1983-11-01

Parametric studies were conducted using the Fusion Engineering Design Center (FEDC) Tokamak Systems Code to investigate the impact of veriation in physics parameters and technology limits on the performance and cost of a low q/sub psi/, high beta, quasi-steady-state tokamak for the purpose of fusion engineering experimentation. The features and characteristics chosen from each study were embodied into a single Advanced Physics Tokamak design for which a self-consistent set of parameters was generated and a value of capital cost was estimated

A Pilot Study on the Efficacy of Volunteer Mentorship for Young Adults With Self-Harm Behaviors Using a Quasi-Experimental Design.

Science.gov (United States)

Law, Yik-Wa; Yip, Paul S F; Lai, Carmen C S; Kwok, Chi Leung; Wong, Paul W C; Liu, Kwong-Sun; Ng, Pauline W L; Liao, Carmen W M; Wong, Tai-Wai

2016-11-01

Studies have shown that postdischarge care for self-harm patients is effective in reducing repeated suicidal behaviors. Little is known about whether volunteer support can help reduce self-harm repetition and improve psychosocial well-being. This study investigated the efficacy of volunteer support in preventing repetition of self-harm. This study used a quasi-experimental design by assigning self-harm patients admitted to the emergency departments to an intervention group with volunteer support and treatment as usual (TAU) for 9 months and to a control group of TAU. Outcome measures include repetition of self-harm, suicidal ideation, hopelessness, and level of depressive and anxiety symptoms. A total of 74 cases were recruited (38 participants; 36 controls). There were no significant differences in age, gender, and clinical condition between the two groups at the baseline. The intervention group showed significant improvements in hopelessness and depressive symptoms. However, the number of cases of suicide ideation and of repetition of self-harm episodes was similar for both groups at the postintervention period. Postdischarge care provided by volunteers showed significant improvement in hopelessness and depression. Volunteers have been commonly involved in suicide prevention services. Further research using rigorous methods is recommended for improving service quality in the long term.

A research-based strategy for managing housing adaptations: study protocol for a quasi-experimental trial.

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Ekstam, Lisa; Carlsson, Gunilla; Chiatti, Carlos; Nilsson, Maria H; Malmgren Fänge, Agneta

2014-11-29

The primary aim of this paper is to describe the design of a project evaluating the effects of using a research-based strategy for managing housing adaptations (HAs). The evaluation targets clients' perspectives in terms of activity, participation, usability, fear of falling, fall incidence, use of mobility devices, and health-related quality of life, and determines the societal effects of HAs in terms of costs. Additional aims of the project are to explore and describe this strategy in relation to experiences and expectations (a) among clients and cohabitants and (b) occupational therapists in ordinary practice. This study is a quasi-experimental trial applying a multiphase design, combining quantitative and qualitative data. At the experimental sites, the occupational therapists (OTs) apply the intervention, i.e. a standardized research-based strategy for HA case management. At the control site, the occupational therapists are following their regular routine in relation to HA. Three municipalities in south Sweden will be included based on their population, their geographical dispersion, and their similar organizational structures for HA administration. Identical data on outcomes is being collected at all the sites at the same four time points: before the HA and then 3, 6, and 12 months after the HA. The data-collection methods are semi-structured qualitative interviews, observations, clinical assessments, and certificates related to each client's HA. The intervention in this study has been developed and tested through many years of research and in collaboration with practitioners. This process includes methodological development and testing research aimed at identifying the most important outcomes and research targeting current HA case-management procedures in Swedish municipalities. When the study is completed, the results will be used for further optimization of the practice strategy for HA, in close collaboration with the data-collecting OTs. No: NCT01960582.

Evaluation of a manual-based programme for the promotion of social and emotional skills in elementary school children: results from a 4-year study in Portugal.

Science.gov (United States)

Moreira, Paulo; Crusellas, Lorena; Sá, Isabel; Gomes, Paulo; Matias, Carla

2010-09-01

The promotion of socio-emotional skills in educational contexts is highly beneficial to individuals' global adjustment and development. Evaluation research suggests that interventions for the promotion of socio-emotional skills are effective. However, most of this work has been carried out in the USA and there is now a pressing need to evaluate interventions at the cross-cultural level. This 4-year study evaluated the effectiveness of a teacher manual-based intervention for the promotion of social and emotional skills in Portuguese elementary school children. Using a quasi-experimental design, teachers taught manual-based strategies to children in the experimental group, focusing on specific social and emotional skills. These strategies were integrated as part of the curricular activities. Results showed statistically significant differences between the experimental group and the control group on the evaluated outcomes (self-control, emotional differentiation, emotional regulation, social skills, and self-esteem). For each of the dimensions studied, effect sizes were large (above 0.80). Findings are similar to those reported by international research evaluating the effectiveness of programmes for the promotion of social and emotional skills in school-age children. This study is an important contribution in the establishment of evidence-based socio-emotional skills programmes at the cross-cultural level.

Are children participating in a quasi-experimental education outside the classroom intervention more physically active?

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Schneller, Mikkel Bo; Duncan, Scott; Schipperijn, Jasper; Nielsen, Glen; Mygind, Erik; Bentsen, Peter

2017-05-26

Education outside the classroom (EOtC) is a curriculum-based approach to teaching that has shown positive associations with children's physical activity and academic learning in small-scale case studies. The purpose of this large-scale quasi-experimental study was to determine if children who participate regularly in EOtC spend more time being physically active than children who do not. In the 2014/2015 study TEACHOUT, classes were recruited in pairs such that each EOtC class had a non-EOtC comparison class at the same school and grade level. Participants in 17 EOtC classes and 16 comparison parallel classes across Denmark wore an Axivity AX3 accelerometer taped to the lower back for seven consecutive days. Data from 201 EOtC participants (63.3% girls, age 10.82 ± 1.05,) and 160 comparison participants (59.3% girls, age 10.95 ± 1.01) were analysed using an 'intention to treat' (ITT) approach. The amount of EOtC the participants were exposed to was monitored. Associations between time spent in different physical activity intensities and EOtC group and sex were assessed using generalised linear models adjusted for age. In a second analysis, we modified the sample using a 'per protocol' (PP) approach, only including EOtC and comparison class pairs where the EOtC class had >150 min and the comparison had <150 min of EOtC during the measured week. On average, EOtC participants spent 8.4 (ITT) and 9.2 (PP) minutes more in moderate-to-vigorous physical activity (MVPA) per day than comparison participants (p < 0.05). However, EOtC boys spent 18.7 (ITT) and 20.8 (PP) minutes more in MVPA per day than comparison boys (p < 0.01), while there were no significant between-group differences for girls. For boys, EOtC was associated with more daily time being spent moderately and vigorously physically active. No differences were observed for girls. Implementing EOtC into schools' weekly practice can be a time- and cost-neutral, supplementary way to increase time spent

Lifestyle intervention as a treatment for obesity in school-age-children in Celaya, Guanajuato: An experimental study

OpenAIRE

Nicolas Padilla-Raygoza; Rosalina Diaz-Guerrero; Ma. Laura Ruiz-Paloalto

2013-01-01

Introduction: Obesity is a risk factor in chronic diseases, and its frequency among children in Mexico is increasing. Objective: To determine the effect of lifestyle intervention as a treatment for obesity in school-age-children from Celaya, Mexico.Methodology: For this experimental study, four schools were randomly selected. Children and parents participated voluntarily and signed consent forms. Two schools were chosen as the experimental group and the other two formed the control group. Age...

The Effectiveness of Psycho-Educational School-Based Child Sexual Abuse Prevention Training Program on Turkish Elementary Students

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Cecen-Erogul, Ayse Rezan; Kaf Hasirci, Ozlem

2013-01-01

In Turkey, there is neither systematic nor structured child sexual abuse prevention programs for school-aged children in school settings. The main purpose of this study was to investigate the effectiveness of a school-based child sexual abuse prevention program on elementary school (4th grade) students. Quasi-experimental design with pretest,…

The Effect of Keyword Method on Vocabulary Retention of Senior High School EFL Learners in Iran

Science.gov (United States)

Davoudi, Mohammad; Yousefi, Dina

2016-01-01

This study aimed at investigating the effect of keyword method, as one of the mnemonic strategies, on vocabulary retention of Iranian senior high school EFL learners. Following a quasi-experimental design, the study used thirty eight (n = 38) female senior high school students in grade four from two intact classes at a public high school. The…

The Effects of Computer Programming on High School Students' Reasoning Skills and Mathematical Self-Efficacy and Problem Solving

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Psycharis, Sarantos; Kallia, Maria

2017-01-01

In this paper we investigate whether computer programming has an impact on high school student's reasoning skills, problem solving and self-efficacy in Mathematics. The quasi-experimental design was adopted to implement the study. The sample of the research comprised 66 high school students separated into two groups, the experimental and the…

Educational intervention for collecting sputum for tuberculosis: a quasi-experimental study.

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Sicsú, Amélia Nunes; Salem, Julia Ignez; Fujimoto, Luciana Botinelly Mendonça; Gonzales, Roxana Isabel Cardozo; Cardoso, Maria do Socorro de Lucena; Palha, Pedro Fredemir

2016-06-07

to evaluate the quality of the sputum sample before and after the Nursing guidance to patients. this is a quasi-experimental research design, single group type, before and after, non-randomized study. The study enrolled patients with suspected pulmonary tuberculosis, respiratory symptomatic patients for over three weeks, aged over 18 years, of both genders and without tuberculosis history in the last two years. The educational intervention consisted of individualized guidance on the collection of sputum sample, which was based on the guidelines of the Ministry of Health of Brazil and on the explanatory folder delivery. in this study participated 138 patients with suspected pulmonary tuberculosis. The results showed significant increase of the samples with purulent particles, volume greater than 5 mL and increased rate of patients diagnosed with tuberculosis, after the educational intervention. it was shown that after the educational intervention, it was observed sputum samples with better quality, with satisfactory aspect and volume for the effectiveness of the bacilloscopic examination. avaliar a qualidade da amostra de escarro antes e após as orientações de Enfermagem ao paciente. estudo com delineamento de pesquisa quase experimental, do tipo grupo único, antes e depois, não randomizado. Participaram do estudo pacientes com suspeita de tuberculose pulmonar, sintomáticos respiratórios por mais de três semanas, maiores de 18 anos, de ambos os sexos e sem antecedente de tuberculose nos últimos dois anos. A intervenção educativa consistiu em orientações individualizadas sobre a coleta da amostra de escarro, fundamentadas nas diretrizes do Ministério da Saúde do Brasil e na entrega de folder explicativo. participaram 138 pacientes com suspeita de tuberculose pulmonar. Os resultados evidenciaram importante acréscimo das amostras com partículas purulentas, volume maior que 5mL e aumento na taxa de pacientes diagnosticados com tuberculose, após a

Quasi-Particle Self-Consistent GW for Molecules.

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Kaplan, F; Harding, M E; Seiler, C; Weigend, F; Evers, F; van Setten, M J

2016-06-14

We present the formalism and implementation of quasi-particle self-consistent GW (qsGW) and eigenvalue only quasi-particle self-consistent GW (evGW) adapted to standard quantum chemistry packages. Our implementation is benchmarked against high-level quantum chemistry computations (coupled-cluster theory) and experimental results using a representative set of molecules. Furthermore, we compare the qsGW approach for five molecules relevant for organic photovoltaics to self-consistent GW results (scGW) and analyze the effects of the self-consistency on the ground state density by comparing calculated dipole moments to their experimental values. We show that qsGW makes a significant improvement over conventional G0W0 and that partially self-consistent flavors (in particular evGW) can be excellent alternatives.

A Fitness Intervention Program within a Physical Education Class on Cardiovascular Endurance among Malaysia Secondary School Students

Science.gov (United States)

Rengasamy, Shabeshan; Raju, Subramaniam; Lee, Wee Akina Sia Seng; Roa, Ramachandran

2014-01-01

The aim of the study was to investigate the effect of a physical fitness intervention program within a physical education class on cardiovascular endurance of Malaysian secondary school boys and girls. A quasi experimental design was adopted for the study. Two schools in a district were randomly selected. In each school, two classes were randomly…

Non-Axisymmetric Shaping of Tokamaks Preserving Quasi-Axisymmetry

Energy Technology Data Exchange (ETDEWEB)

Long-Poe Ku and Allen H. Boozer

2009-06-05

If quasi-axisymmetry is preserved, non-axisymmetric shaping can be used to design tokamaks that do not require current drive, are resilient to disruptions, and have robust plasma stability without feedback. Suggestions for addressing the critical issues of tokamaks can only be validated when presented with sufficient specificity that validating experiments can be designed. The purpose of this paper is provide that specificity for non-axisymmetric shaping. To our knowledge, no other suggestions for the solution of a number of tokamak issues, such as disruptions, have reached this level of specificity. Sequences of three-field-period quasi-axisymmetric plasmas are studied. These sequences address the questions: (1) What can be achieved at various levels of non-axisymmetric shaping? (2) What simplifications to the coils can be achieved by going to a larger aspect ratio? (3) What range of shaping can be achieved in a single experimental facility? The sequences of plasmas found in this study provide a set of interesting and potentially important configurations.

Effects of Outdoor School Ground Lessons on Students' Science Process Skills and Scientific Curiosity

Science.gov (United States)

Ting, Kan Lin; Siew, Nyet Moi

2014-01-01

The purpose of this study was to investigate the effects of outdoor school ground lessons on Year Five students' science process skills and scientific curiosity. A quasi-experimental design was employed in this study. The participants in the study were divided into two groups, one subjected to the experimental treatment, defined as…

Impact of trained champions of comprehensive school physical activity programs on school physical activity offerings, youth physical activity and sedentary behaviors.

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Carson, Russell L; Castelli, Darla M; Pulling Kuhn, Ann C; Moore, Justin B; Beets, Michael W; Beighle, Aaron; Aija, Rahma; Calvert, Hannah G; Glowacki, Elizabeth M

2014-12-01

A quasi-experimental cluster-controlled design was used to test the impact of comprehensive school physical activity program (CSPAP) professional development on changes in school physical activity (PA) offerings, moderate-to-vigorous physical activity (MVPA) and sedentary behaviors of 9-14 year-old children during school. Two groups of Louisiana elementary and middle school physical education teachers (N=129) attended a CSPAP summer workshop (95 in 2012=intervention, 34 in 2013=control) and were assessed on school PA offerings (teacher-reported; pre, mid, and post). During the 2012-2013 school year, intervention teachers received CSPAP support while implementing new school PA programs. MVPA and sedentary behaviors were assessed (accelerometry; baseline and post) on a sample of 231 intervention, 120 control students from 16 different schools. Multivariate analysis of covariance indicated that intervention teachers reported significantly more PA offerings during school (3.35 vs. 2.37) and that involve staff (1.43 vs. 0.90). Three-level, mixed model regressions (stratified by sex) indicated that students overall spent less time in MVPA and more time being sedentary during school, but the effects were significantly blunted among intervention students, especially boys. This study provides preliminary evidence for CSPAP professional development programs to influence school-level PA offerings and offset student-level declines in MVPA and increases in sedentary behavior. Published by Elsevier Inc.

A comparison study of instruction between international school and state school of middle school level in Indonesia

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Pamelasari, S. D.; Nurkhalisa, S.; Laksmana, S. I.

2018-03-01

This paper presents a comparison between the instruction in international school and state school in the middle level in Indonesia to find out the strength and weakness of each school in order to identify some professional development needs. The observation and interview were conducted to see the instruction of each school. Some pedagogy aspects consisting of attitude, strategy, and practice were observed to get the overview of instruction. Through this study, it has been found that the teachers apply an active learning approach that created an enthusiastic atmosphere of students’ participation. However, the different circumstance found is in the aspect of the number of students, the language of instruction and students’ characteristics between those schools.

Online Comic in Mandarin Chinese’s Vocabulary Learning: A Case Study of Budi Utama Multilingual School in Yogyakarta, Indonesia

Directory of Open Access Journals (Sweden)

Nuning Catur Sri Wilujeng

2015-09-01

Full Text Available This study was aimed to investigate 1 the improvement of CFL elementary-school students’ skill in learning Mandarin Chinese (hereafter referred to as Mandarin vocabulary through creating comic without online resources, creating online comics individually and collaboratively, 2 the CFL elementary-school students’ attitude towards the application of comics in learning Mandarin vocabulary, and 3 the CFL elementary-school students’ attitude towards the application of collaborative activities in learning Mandarin vocabulary. The research design was based on a quasi-experiment using both qualitative and quantitative approaches. Three classes participated in this study: one class was the control group using text-based instruction without online resources; the other two classes were the experimental groups 1 and 2. In the experimental group 1, students worked individually on online comic whereas in the experimental group 2, students worked collaboratively on online comic. All participants were Grade 5 students of Budi Utama Multilingual School in Yogyakarta, Indonesia. The collected and analyzed data included performances on Mandarin vocabulary, in-class observation, questionnaires, and interview. In Mandarin vocabulary performances, the experimental group 2 outperformed the other two groups and the experimental group 1 performed better than the control group. In the students’ attitude, the experimental group 2 behaved more positively than the two other groups, and the control group behaved more positively than the experimental group 1.

Effectiveness of after-school interventions at increasing moderate-to-vigorous physical activity levels in 5- to 18-year olds: a systematic review and meta-analysis.

Science.gov (United States)

Mears, Ruth; Jago, Russell

2016-05-24

Physical activity in children improves cardiovascular, mental, metabolic and skeletal health. Many children fail to meet the national recommendation of at least 60 min per day of moderate-to-vigorous physical activity (MVPA). After-school programmes provide an opportunity to engage children in physical activity. This systematic review and meta-analysis examine the effectiveness of after-school interventions at increasing MVPA levels in children and adolescents. Systematic review and meta-analyses. A literature search was conducted using MEDLINE, EMBASE and PsychINFO databases from January 1950 to April 2015. Inclusion criteria-Population: participants aged 5-18 years. an after-school programme in a school-based setting as the main component of an intervention to increase physical activity levels. individual-level measure of time spent in MVPA. quasi-experimental, pilot, non-randomised or randomised trials. conference abstracts, unpublished articles, dissertations and non-English language papers. 1387 records were identified through database searching. After removal of duplicates, there were 748 records. 15 articles met the inclusion criteria for the systematic review. 6 studies were eligible for meta-analysis and the pooled intervention effect at end point follow-up was 4.84 min/day of MVPA (95% CI -0.94 to 10.61). The effectiveness of after-school interventions varied considerably and comparisons between studies limited by different methodological study designs. Subgroup analyses within a small minority of studies revealed significant benefits in overweight/obese children and boys. There was a lack of convincing evidence that interventions based on theories of behaviour change were more effective than those with no underlying theory. After-school physical activity interventions to date have had mixed effectiveness on increasing MVPA levels. More robust evaluations of extracurricular physical activity interventions are required, particularly studies that use

Teaching High School Students to Manage Time: The Development of an Intervention

Science.gov (United States)

Burrus, Jeremy; Jackson, Teresa; Holtzman, Steven; Roberts, Richard D.

2017-01-01

This article reports the results of a quasi-experimental study conducted to examine the efficacy of a new time management intervention designed for high school students. Participants were 149 students from a highly selective private high school in the northeastern United States who were in the ninth grade. Half of the students participated in a…

The Enhancement of Junior High School Students' Abilities in Mathematical Problem Solving Using Soft Skill-based Metacognitive Learning

OpenAIRE

Murni, Atma; Sabandar, Jozua; S. Kusumah, Yaya; Kartasamita, Bana Goerbana

2013-01-01

The aim of this study is to know the differences of enhancement in mathematical problem solving ability (MPSA) between the students who received soft skill- based metacognitive learning (SSML) with the students who got conventional learning (CL). This research is a quasi experimental design with pretest-postest control group. The population in this study is the students of Junior High School in Pekanbaru city. The sample consist of 135 students, 68 of them are from the high-level...

Four-level time decomposition quasi-static power flow and successive disturbances analysis. [Power system disturbances

Energy Technology Data Exchange (ETDEWEB)

Jovanovic, S M [Nikola Tesla Inst., Belgrade (YU)

1990-01-01

This paper presents a model and an appropriate numerical procedure for a four-level time decomposition quasi-static power flow and successive disturbances analysis of power systems. The analysis consists of the sequential computation of the zero, primary, secondary and tertiary quasi-static states and of the estimation of successive structural disturbances during the 1200 s dynamics after a structural disturbance. The model is developed by detailed inspection of the time decomposition characteristics of automatic protection and control devices. Adequate speed of the numerical procedure is attained by a specific application of the inversion matrix lemma and the decoupled model constant coefficient matrices. The four-level time decomposition quasi-static method is intended for security and emergency analysis. (author).

Diode-pumped quasi-three-level CW Nd:CLNGG and Nd:CNGG lasers.

Science.gov (United States)

He, Kunna; Wei, Zhiyi; Li, Dehua; Zhang, Zhiguo; Zhang, Huaijin; Wang, Jiyang; Gao, Chunqing

2009-10-12

We have demonstrated what is to our knowledge the first quasi-three-level CW Nd:CLNGG laser with simple linear resonator. When the pump power was 18.2 W, a maximum output power of 1.63 W was obtained at the dual-wavelength of 935 nm and 928 nm. The optical-to-optical conversion efficiency was 9.0% and the slope efficiency was 11.5%. Lasing characteristics of a quasi-three-level CW Nd:CNGG laser were also investigated. A maximum output power of 1.87 W was obtained at the single-wavelength of 935 nm with 15.2 W pump power, corresponding to an optical-to-optical conversion efficiency of 12.3% and a slope efficiency of 15.6%.

Effectiveness of an evidence-based practice (EBP) course on the EBP competence of undergraduate nursing students: A quasi-experimental study.

Science.gov (United States)

Ruzafa-Martínez, María; López-Iborra, Lidón; Armero Barranco, David; Ramos-Morcillo, Antonio Jesús

2016-03-01

International nursing institutions and experts recommend evidence-based practice (EBP) as a core component of the curriculum for nurses. However, the impact of EBP training on the competence of undergraduate nursing students remains unclear. To evaluate the effectiveness of an EBP course on the EBP competence undergraduate nursing students'. Quasi-experimental study carried out in non-randomized intervention and control groups. The study was conducted in a Spanish public university in 2010. Out of 420 second- and third-year nursing students, 75 were enrolled in the EBP course, forming the intervention group, and 73 were not enrolled in this course were recruited as controls. The educational intervention was a 15-week course designed to teach EBP competence. The EBP Competence Questionnaire (EBP-COQ) was administered before and after the intervention. Repeated-measure ANOVA was used to compare intervention and control group scores before and at two months after the 15-week intervention period. At 2months after the EBP course, mean EBP-COQ scores of the intervention group were significantly improved versus baseline in attitude (4.28 vs. 3.33), knowledge (3.92 vs. 2.82) and skills (4.01 vs. 2.75) dimensions, whereas little change was observed in control group scores over the same time period. Repeated-measures ANOVA revealed a significant effect of Time ×Group interaction on global competence and all three EBP-COQ dimensions. Undergraduate nursing students experience positive changes in EBP competence, knowledge, skills, and attitude as the result of a 15-week educational intervention on EBP. This EBP course may provide nursing school educators and policymakers with a useful model for integrating EBP teaching within the nursing curriculum. Copyright © 2015 Elsevier Ltd. All rights reserved.

Workflow standardization of a novel team care model to improve chronic care: a quasi-experimental study.

Science.gov (United States)

Panattoni, Laura; Hurlimann, Lily; Wilson, Caroline; Durbin, Meg; Tai-Seale, Ming

2017-04-19

Team-based chronic care models have not been widely adopted in community settings, partly due to their varying effectiveness in randomized control trials, implementation challenges, and concerns about physician acceptance. The Palo Alto Medical Foundation designed and implemented "Champion," a novel team-based model that includes new standard work (e.g. proactive patient outreach, pre-visit schedule grooming, depression screening, care planning, health coaching) to support patients' self-management of hypertension and diabetes. We investigated whether Champion improved clinical outcomes. We conducted a quasi-experimental study comparing the Champion clinic-level intervention (n = 38 physicians) with a usual care clinic (n = 37 physicians) in Northern California. The primary outcomes, blood pressure and glycohemoglobin (A1c), were analyzed using a piecewise linear growth curve model for patients exposed to a Champion physician visit (n = 3156) or usual care visit (n = 8034) in the two years prior and one year post implementation. Secondary outcomes were provider experience, compared at baseline and 12 months in both the intervention and usual care clinics using multi-level ordered logistic modeling, and electronic health record based fidelity measures. Compared to usual care, in the first 6 months after a Champion physician visit, diabetes patients aged 18-75 experienced an additional -1.13 mm Hg (95% CI: -2.23 to -0.04) decline in diastolic blood pressure and -0.47 (95% CI: -0.61 to -0.33) decline in A1c. There were no additional improvements in blood pressure or A1c 6 to 12 months post physician visit. At 12 months, Champion physicians reported improved experience with managing chronic care patients in 6 of 7 survey items (p work was uneven; depression screening was the most commonly documented element (85% of patients), while care plans were the least (30.8% of patients). Champion standard work improved glycemic control over the first 6�

The Effects of an Orientation Program on Quality of Life of Patients with Thalassemia: a Quasi-Experimental Study.

Science.gov (United States)

Rafii, Zahra; Ahmadi, Fazlollah; Nourbakhsh, Sayed Mohamad Kazem; Hajizadeh, Ebrahim

2016-09-01

Introduction: Medical advances have improved life expectancy and survival of patients with thalassemia. However, as getting older, patients with thalassemia experience different complications which impair their quality of life. The aim of this study was to examine the effects of a nurse-implemented orientation program on quality of life in patients with thalassemia. Methods: A convenience sample of 55 patients with thalassemia were recruited in this quasi-experimental study. Patients were randomly allocated to control or experimental groups. A demographic questionnaire, Thalassemia quality of life questionnaire, and 36-item short form health survey were used for data collection before and one month after the intervention. In the intervention group, 1.5-month orientation program including of the three steps of inauguration, implementation, and closure was implemented, while the control group received routine care. The Chi-square, independent t-test and paired-samples t-test were used for data analysis by using SPSS ver.13 software. Results: The intervention and control group did not differ significantly from each other regarding demographic characteristics. Moreover, no significant difference was observed between the two groups regarding the quality of life scores after the implementation of orientation program. Conclusion: Implementing a short-term orientation program was not effective in enhancing the quality of life in patients with thalassemia; hence, developing long-term multimodal strategies may result in better improvement.

The Effects of an Orientation Program on Quality of Life of Patients with Thalassemia: a Quasi-Experimental Study

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Zahra Rafii

2016-09-01

Full Text Available Introduction: Medical advances have improved life expectancy and survival of patients with thalassemia. However, as getting older, patients with thalassemia experience different complications which impair their quality of life. The aim of this study was to examine the effects of a nurse-implemented orientation program on quality of life in patients with thalassemia. Methods: A convenience sample of 55 patients with thalassemia were recruited in this quasi-experimental study. Patients were randomly allocated to control or experimental groups. A demographic questionnaire, Thalassemia quality of life questionnaire, and 36-item short form health survey were used for data collection before and one month after the intervention. In the intervention group, 1.5-month orientation program including of the three steps of inauguration, implementation, and closure was implemented, while the control group received routine care. The Chi-square, independent t-test and paired-samples t-test were used for data analysis by using SPSS ver.13 software. Results: The intervention and control group did not differ significantly from each other regarding demographic characteristics. Moreover, no significant difference was observed between the two groups regarding the quality of life scores after the implementation of orientation program. Conclusion: Implementing a short-term orientation program was not effective in enhancing the quality of life in patients with thalassemia; hence, developing long-term multimodal strategies may result in better improvement.

The Effect of Manipulatives on Mathematics Achievement and Attitudes of Secondary School Students

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Kontas, Hakki

2016-01-01

The purpose of this study is to investigate the effect of manipulatives (concrete learning materials) both on the academic achievement of secondary school students in mathematics and on their attitudes towards mathematics. Pretest-posttest control group experimental model, which is one of the quasi-experimental research designs, was used in the…

Derivation of capture and reaction cross sections from experimental quasi-elastic and elastic backscattering probabilities

International Nuclear Information System (INIS)

Sargsyan, V.V.; Adamian, G.G.; Antonenko, N.V.; Gomes, P.R.S.

2014-01-01

We suggest simple and useful methods to extract reaction and capture (fusion) cross sections from the experimental elastic and quasi-elastic backscattering data.The direct measurement of the reaction or capture (fusion) cross section is a difficult task since it would require the measurement of individual cross sections of many reaction channels, and most of them could be reached only by specific experiments. This would require different experimental setups not always available at the same laboratory and, consequently, such direct measurements would demand a large amount of beam time and would take probably some years to be reached. Because of that, the measurements of elastic scattering angular distributions that cover full angular ranges and optical model analysis have been used for the determination of reaction cross sections. This traditional method consists in deriving the parameters of the complex optical potentials which fit the experimental elastic scattering angular distributions and then of deriving the reaction cross sections predicted by these potentials. Even so, both the experimental part and the analysis of this latter method are not so simple. In the present work we present a much simpler method to determine reaction and capture (fusion) cross sections. It consists of measuring only elastic or quasi-elastic scattering at one backward angle, and from that, the extraction of the reaction or capture cross sections can easily be performed. (author)

Is poker a game of skill or chance? A quasi-experimental study.

Science.gov (United States)

Meyer, Gerhard; von Meduna, Marc; Brosowski, Tim; Hayer, Tobias

2013-09-01

Due to intensive marketing and the rapid growth of online gambling, poker currently enjoys great popularity among large sections of the population. Although poker is legally a game of chance in most countries, some (particularly operators of private poker web sites) argue that it should be regarded as a game of skill or sport because the outcome of the game primarily depends on individual aptitude and skill. The available findings indicate that skill plays a meaningful role; however, serious methodological weaknesses and the absence of reliable information regarding the relative importance of chance and skill considerably limit the validity of extant research. Adopting a quasi-experimental approach, the present study examined the extent to which the influence of poker playing skill was more important than card distribution. Three average players and three experts sat down at a six-player table and played 60 computer-based hands of the poker variant "Texas Hold'em" for money. In each hand, one of the average players and one expert received (a) better-than-average cards (winner's box), (b) average cards (neutral box) and (c) worse-than-average cards (loser's box). The standardized manipulation of the card distribution controlled the factor of chance to determine differences in performance between the average and expert groups. Overall, 150 individuals participated in a "fixed-limit" game variant, and 150 individuals participated in a "no-limit" game variant. ANOVA results showed that experts did not outperform average players in terms of final cash balance. Rather, card distribution was the decisive factor for successful poker playing. However, expert players were better able to minimize losses when confronted with disadvantageous conditions (i.e., worse-than-average cards). No significant differences were observed between the game variants. Furthermore, supplementary analyses confirm differential game-related actions dependent on the card distribution, player status

Are Educational Computer Micro-Games Engaging and Effective for Knowledge Acquisition at High-Schools? A Quasi-Experimental Study

Science.gov (United States)

Brom, Cyril; Preuss, Michal; Klement, Daniel

2011-01-01

Curricular schooling can benefit from the usage of educational computer games, but it is difficult to integrate them in the formal schooling system. Here, we investigate one possible approach to this integration, which capitalizes on using a micro-game that can be played with a teacher's guidance as a supplement after a traditional expository…

Reach and effectiveness of a community program to reduce smoking among ethnic Turkish residents in Rotterdam, the Netherlands: a quasi-experimental design

NARCIS (Netherlands)

Nierkens, Vera; Kunst, Anton E.; de Vries, Hein; Voorham, Toon A. J.; Stronks, Karien

2013-01-01

Community interventions have been considered promising strategies to reduce smoking prevalence among ethnic minority populations. We assessed the reach and effectiveness of a community program targeted at the Turkish population in Rotterdam, the Netherlands. The study had a quasi-experimental

Design study on quasi-constant gradient accelerator structure

International Nuclear Information System (INIS)

Wang, J.W.; Littmann, B.W.

1991-09-01

In order to obtain high luminosity, the Next Linear Collider will operate in multibunch mode with ten or more bunches per bunch train. This leads to the need for detuning and/or damping of higher modes to control multibunch beam breakup. Continued studies of wake fields for a detuned structure with a Gaussian distribution of dipole modes showed encouraging results, and a detuned structure model has been tested experimentally. It is desirable to study the design method for this type of structure, which has a quasi-constant accelerating gradient. This note gives a brief summary of the design procedure. Also, the RF parameters of the structure are evaluated to compare with conventional constant gradient and constant impedance structures

The effectiveness of assertiveness training for school-aged children on bullying and assertiveness level.

Science.gov (United States)

Avşar, Fatma; Ayaz Alkaya, Sultan

The aim of this study was to determine the effectiveness of an assertive training for school-aged children on peer bullying and assertiveness. A quasi-experimental design using pre- and post-testing was conducted. Data were collected using a demographic questionnaire, an assertiveness scale, and the peer victimization scale. The training program was comprised of eight sessions which were implemented to intervention group. Descriptive characteristics were not statistically different between the groups (p>0.05). The peer victimization victim dimension results show that post-test mean scores of the students in the intervention group were lower than the pre-test mean scores (p0.05). A comparison of the mean pre-test/post-test scores of peer-victimization bully dimension of the students' intervention and control groups revealed that the mean post-test scores of the students in the each group decreased (p>0.05). An assertiveness training program increased the assertiveness level and reduced the state of being victims, but did not affect the state of being bullies. The results of this study can help children acquire assertive behaviors instead of negative behaviors such as aggression and shyness, and help them to build effective social communication. Copyright © 2017 Elsevier Inc. All rights reserved.

Modifying Attitudes of Arab School Teachers toward Stuttering

Science.gov (United States)

Abdalla, Fauzia; St. Louis, Kenneth O.

2014-01-01

Purpose: The authors of this quasi-experimental design study explored the effect of an educational documentary video that presented factual and emotional aspects of stuttering on changing attitudes toward stuttering of preservice trainees and in-service public school teachers in Kuwait. Method: Participants were 99 preservice trainees (48 control,…

Evaluation of an osteoporosis and fall risk intervention program for community-dwelling elderly. A quasi-experimental study of behavioral modifications.

Science.gov (United States)

Grahn Kronhed, Ann-Charlotte; Blomberg, Carina; Löfman, Owe; Timpka, Toomas; Möller, Margareta

2006-06-01

Osteoporosis and fall fractures are increasing problems amongst the elderly. The aim of this study was to explore whether combined population-based and individual interventions directed at risk factors for osteoporosis and falls result in behavioral changes in an elderly population. A quasi-experimental design was used for the study. Persons aged >or=65 years were randomly selected in the intervention and control community. An intervention program was managed from the primary health care center and delivered to the community. Health education was designed to increase awareness of risk factors for the development of osteoporosis and falling. Questionnaires about lifestyle, health, previous fractures, safety behavior and physical activity level were distributed at baseline in 1989 and at the follow-ups in 1992 and 1994 in both communities. There was a difference of 17.7% between the dual intervention (receiving both population-based and individual interventions) and the control samples regarding the self-reported use of shoe/cane spikes, and a difference of 20.5% regarding the reported "moderate level" of physical activity in 1994. There was an increase in the number of participants in the dual intervention sample who, at baseline, had not reported equipping their homes with non-slip mats and removing loose rugs but who did report these changes in 1994. The increase in the reported use of shoe/cane spikes in the dual intervention sample was observed mainly for the period 1992-1994. A public health intervention model, including both population-based and individual interventions, can contribute to behavioral changes in the prevention of falls and changed physical activity patterns amongst elderly people.

Experimental study of self-leveling behavior in debris bed

International Nuclear Information System (INIS)

Zhang, Bin; Harada, Tetsushi; Hirahara, Daisuke; Matsumoto, Tatsuya; Morita, Koji; Fukuda, Kenji; Yamano, Hidemasa; Suzuki, Tohru; Tobita, Yoshiharu

2008-01-01

After a core disruptive accident in a sodium-cooled fast reactor, core debris may settle on locations such as within the core-support structure or in the lower inlet plenum of the reactor vessel as debris beds, as a consequence of rapid quenching and fragmentation of core materials in subcooled sodium. The particle beds that are initially of varying depth have been observed to undergo a process of self-leveling when sodium boiling occurs within the beds. The boiling is believed to provide the driven force with debris needed to overcome resisting forces. Self-leveling ability has much effect on heat-removal capability of debris beds. In the present study, characteristics of self-leveling behaviors were investigated experimentally with simulant materials. Although the decay heat from fuel debris drives the coolant boiling in reactor accident conditions, the present experiments employed depressurization boiling of water to simulate axially increasing void distribution in a debris bed, which consists of solid particles of alumina or lead with different density. The particle size (from 0.5 mm to 6 mm in diameter) and shape (spherical or non-spherical particles) were also taken as experimental parameters. A rough criteria for self-leveling occurrence is proposed and compared with the experimental results. Characteristics of the self-leveling behaviors observed are analyzed and extrapolate to reactor accident conditions. (author)

Reduced Availability of Sugar-Sweetened Beverages and Diet Soda Has a Limited Impact on Beverage Consumption Patterns in Maine High School Youth

Science.gov (United States)

Whatley Blum, Janet E.; Davee, Anne-Marie; Beaudoin, Christina M.; Jenkins, Paul L.; Kaley, Lori A.; Wigand, Debra A.

2008-01-01

Objective: To examine change in high school students' beverage consumption patterns pre- and post-intervention of reduced availability of sugar-sweetened beverages (SSB) and diet soda in school food venues. Design: A prospective, quasi-experimental, nonrandomized study design. Setting: Public high schools. Participants: A convenience sample from…

Effect of the dedicated education unit on nursing student self-efficacy: A quasi-experimental research study.

Science.gov (United States)

George, Lynn E; Locasto, Lisa W; Pyo, Katrina A; W Cline, Thomas

2017-03-01

Although the Dedicated Education Unit (DEU) has shown initial promise related to satisfaction with the teaching/learning environment, few studies have examined student outcomes related to the use of the DEU as a clinical education model beyond student satisfaction. The purpose of this quantitative, quasi-experimental study was to compare student outcomes from the traditional clinical education (TCE) model with those from the DEU model. Participants were students enrolled in a four-year baccalaureate program in nursing (n = 193) who had clinical education activities in one of three clinical agencies. Participants were assigned to either the DEU or a TCE model. Pre-clinical and post-clinical self-efficacy scores were measured for each group using an adapted Generalized Self-Efficacy Scale (Schwarzer and Jerusalem, 1995). Both groups experienced a significant increase in self-efficacy scores post clinical education. The increase in self-efficacy for the DEU students was significantly greater than the increase in self-efficacy for the traditional students. Self-efficacy is considered an important outcome of nursing education because high self-efficacy has been linked to making an easier transition from student to nursing professional. This study supports the quality of the DEU as a clinical education model by examining student self-efficacy outcomes. Copyright © 2017 Elsevier Ltd. All rights reserved.

The Effectiveness of Conceptual Change Texts in Remediating High School Students' Alternative Conceptions Concerning Chemical Equilibrium

Science.gov (United States)

Ozmen, Haluk

2007-01-01

This study investigated the effectiveness of conceptual change texts in remediating high school students' alternative conceptions concerning chemical equilibrium. A quasi-experimental design was used in this study. The subjects for this study consisted of a total 78 tenth-grade students, 38 of them in the experimental group and 40 of them in the…

The experimentation of LC7E learning model on the linear program material in terms of interpersonal intelligence on Wonogiri Vocational School students

Science.gov (United States)

Antinah; Kusmayadi, T. A.; Husodo, B.

2018-03-01

This study aimed to determine the effect of learning model on student achievement in terms of interpersonal intelligence. The compared learning models are LC7E and Direct learning model. This type of research is a quasi-experimental with 2x3 factorial design. The population in this study is a Grade XI student of Wonogiri Vocational Schools. The sample selection had done by stratified cluster random sampling. Data collection technique used questionnaires, documentation and tests. The data analysis technique used two different unequal cell variance analysis which previously conducted prerequisite analysis for balance test, normality test and homogeneity test. he conclusions of this research are: 1) student learning achievement of mathematics given by LC7E learning model is better when compared with direct learning; 2) Mathematics learning achievement of students who have a high level of interpersonal intelligence is better than students with interpersonal intelligence in medium and low level. Students’ mathematics learning achievement with interpersonal level of intelligence is better than those with low interpersonal intelligence on linear programming; 3) LC7E learning model resulted better on mathematics learning achievement compared with direct learning model for each category of students’ interpersonal intelligence level on linear program material.

The experimentation of LC7E learning model on the linear program material in terms of interpersonal intelligence on Wonogiri vocational school students

Science.gov (United States)

Antinah; Kusmayadi, T. A.; Husodo, B.

2018-05-01

This study aims to determine the effect of learning model on student achievement in terms of interpersonal intelligence. The compared learning models are LC7E and Direct learning model. This type of research is a quasi-experimental with 2x3 factorial design. The population in this study is a Grade XI student of Wonogiri Vocational Schools. The sample selection had done by stratified cluster random sampling. Data collection technique used questionnaires, documentation and tests. The data analysis technique used two different unequal cell variance analysis which previously conducted prerequisite analysis for balance test, normality test and homogeneity test. he conclusions of this research are: 1) student learning achievement of mathematics given by LC7E learning model is better when compared with direct learning; 2) Mathematics learning achievement of students who have a high level of interpersonal intelligence is better than students with interpersonal intelligence in medium and low level. Students' mathematics learning achievement with interpersonal level of intelligence is better than those with low interpersonal intelligence on linear programming; 3) LC7E learning model resulted better on mathematics learning achievement compared with direct learning model for each category of students’ interpersonal intelligence level on linear program material.

PENERAPAN PENDEKATAN CINEMATHERAPY UNTUK MENINGKATKAN PERILAKU PROSOSIAL PADA SISWA KELAS VIII DI BOSOWA INTERNATIONAL SCHOOL MAKASSAR

Directory of Open Access Journals (Sweden)

Haeruddin Niva

2016-06-01

Full Text Available The objectives of the research are: (i to know the prosocial behavioral level of the students in Bosowa International School Makassar before and after giving cinematography approach, and (ii to know whether or not the approach is able to enhance the prosocial behavior of the students in Bosowa International School Makassar. The research is a quantitative research using experimental method. The research design used is quasi experimental design with non-equivalent control group design. The data collection technique applied is scale and FGD (Focus Group Discussion. The findings shows that (i the prosocial behavioral level of the students was low in pretest while after giving treatment there were significant increase to the prosocial behavior in the experimental group, and (ii the cinematography approach was able to increase the prosocial behavior of the Grade VIII students in Bosowa Internatinal School Makassar. 

A Study of Influence of Mother-Tongue, Teacher's Qualification ...

African Journals Online (AJOL)

The study employed a pre-test and post-test quasi-experimental and control group design. ... were adopted to select the four schools used in experimental and control group, while stratified random ... One experimental and the other as control.

Remediating Misconception on Climate Change among Secondary School Students in Malaysia

Science.gov (United States)

Karpudewan, Mageswary; Roth, Wolff-Michael; Chandrakesan, Kasturi

2015-01-01

Existing studies report on secondary school students' misconceptions related to climate change; they also report on the methods of teaching as reinforcing misconceptions. This quasi-experimental study was designed to test the null hypothesis that a curriculum based on constructivist principles does not lead to greater understanding and fewer…

Does the Organization of Instruction Differ in Charter Schools? Ability Grouping and Students' Mathematics Gains

Science.gov (United States)

Berends, Mark; Donaldson, Kristi

2016-01-01

Background: Although we have learned a good deal from lottery-based and quasi-experimental studies of charter schools, much of what goes on inside of charter schools remains a "black box" to be unpacked. Grounding our work in neoclassical market theory and institutional theory, we examine differences in the social organization of schools…

Impact of a Technology-Infused Middle School Writing Program on Sixth-Grade Students' Writing Ability and Engagement

Science.gov (United States)

Goldenberg, Lauren; Meade, Terri; Midouhas, Emily; Cooperman, Naomi

2011-01-01

Process-oriented approaches are increasingly used in schools to improve writing. One of these approaches, known as the writing workshop model, is challenging for teachers to implement without supports. This quasi-experimental study evaluated the effectiveness of a middle school writing program that incorporates this model along with technological…

Long-term effects of neighbourhood deprivation on diabetes risk: quasi-experimental evidence from a refugee dispersal policy in Sweden.

Science.gov (United States)

White, Justin S; Hamad, Rita; Li, Xinjun; Basu, Sanjay; Ohlsson, Henrik; Sundquist, Jan; Sundquist, Kristina

2016-06-01

Although studies have shown associations between neighbourhood quality and chronic disease outcomes, such associations are potentially confounded by the selection of different types of people into different neighbourhood environments. We sought to identify the causal effects of neighbourhood deprivation on type 2 diabetes risk, by comparing refugees in Sweden who were actively dispersed by government policy to low-deprivation, moderate-deprivation, or high-deprivation neighbourhoods. In this quasi-experimental study, we analysed national register data for refugees who arrived in Sweden aged 25-50 years, at a time when the government policy involved quasi-random dispersal of refugees to neighbourhoods with different levels of poverty and unemployment, schooling, and social welfare participation. Individuals in our sample were assigned to a neighbourhood categorised as high deprivation (≥1 SD above the mean), moderate deprivation (within 1 SD of the mean), or low deprivation (≥1 SD below the mean). The primary outcome was new diagnosis of type 2 diabetes between Jan 1, 2002, and Dec 31, 2010. We used multivariate logistic and linear regressions to assess the effects of neighbourhood deprivation on diabetes risk, controlling for potential confounders affecting neighbourhood assignment and assessing effects of cumulative exposure to different neighbourhood conditions. We included data for 61 386 refugees who arrived in Sweden during 1987-91 and who were assigned to one of 4833 neighbourhoods. Being assigned to an area deemed high deprivation versus low deprivation was associated with an increased risk of diabetes (odds ratio [OR] 1·22, 95% CI 1·07-1·38; p=0·001). In analyses that included fixed effects for assigned municipality, the increased diabetes risk was estimated to be 0·85 percentage points (95% CI -0·030 to 1·728; p=0·058). Neighbourhood effects grew over time such that 5 years of additional exposure to high-deprivation versus low

The value of (pre)school playgrounds for children's physical activity level: a systematic review.

Science.gov (United States)

Broekhuizen, Karen; Scholten, Anne-Marie; de Vries, Sanne I

2014-05-03

The (pre)school environment is an important setting to improve children's health. Especially, the (pre)school playground provides a major opportunity to intervene. This review presents an overview of the existing evidence on the value of both school and preschool playgrounds on children's health in terms of physical activity, cognitive and social outcomes. In addition, we aimed to identify which playground characteristics are the strongest correlates of beneficial effects and for which subgroups of children effects are most distinct. In total, 13 experimental and 17 observational studies have been summarized of which 10 (77%) and 16 (94%) demonstrated moderate to high methodological quality, respectively. Nearly all experimental studies (n = 11) evaluated intervention effects on time spent in different levels of physical activity during recess. Research on the effects of (pre)school playgrounds on cognitive and social outcomes is scarce (n = 2). The experimental studies generated moderate evidence for an effect of the provision of play equipment, inconclusive evidence for an effect of the use of playground markings, allocating play space and for multi-component interventions, and no evidence for an effect of decreasing playground density, the promotion of physical activity by staff and increasing recess duration on children's health. In line with this, observational studies showed positive associations between play equipment and children's physical activity level. In contrast to experimental studies, significant associations were also found between children's physical activity and a decreased playground density and increased recess duration. To confirm the findings of this review, researchers are advised to conduct more experimental studies with a randomized controlled design and to incorporate the assessment of implementation strategies and process evaluations to reveal which intervention strategies and playground characteristics are most effective.

Evaluating the effectiveness of care integration strategies in different healthcare systems in Latin America: the EQUITY-LA II quasi-experimental study protocol

Science.gov (United States)

Vázquez, María-Luisa; Vargas, Ingrid; Unger, Jean-Pierre; De Paepe, Pierre; Mogollón-Pérez, Amparo Susana; Samico, Isabella; Albuquerque, Paulette; Eguiguren, Pamela; Cisneros, Angelica Ivonne; Rovere, Mario; Bertolotto, Fernando

2015-01-01

Introduction Although fragmentation in the provision of healthcare is considered an important obstacle to effective care, there is scant evidence on best practices in care coordination in Latin America. The aim is to evaluate the effectiveness of a participatory shared care strategy in improving coordination across care levels and related care quality, in health services networks in six different healthcare systems of Latin America. Methods and analysis A controlled before and after quasi-experimental study taking a participatory action research approach. In each country, two comparable healthcare networks were selected—intervention and control. The study contains four phases: (1) A baseline study to establish network performance in care coordination and continuity across care levels, using (A) qualitative methods: semi-structured interviews and focus groups with a criterion sample of health managers, professionals and users; and (B) quantitative methods: two questionnaire surveys with samples of 174 primary and secondary care physicians and 392 users with chronic conditions per network. Sample size was calculated to detect a proportion difference of 15% and 10%, before and after intervention (α=0.05; β=0.2 in a two-sided test); (2) a bottom-up participatory design and implementation of shared care strategies involving micro-level care coordination interventions to improve the adequacy of patient referral and information transfer. Strategies are selected through a participatory process by the local steering committee (local policymakers, health care network professionals, managers, users and researchers), supported by appropriate training; (3) Evaluation of the effectiveness of interventions by measuring changes in levels of care coordination and continuity 18 months after implementation, applying the same design as in the baseline study; (4) Cross-country comparative analysis. Ethics and dissemination This study complies with international and national legal

Experimental validation of Villain's conjecture about magnetic ordering in quasi-1D helimagnets

Energy Technology Data Exchange (ETDEWEB)

Cinti, F., E-mail: fabio.cinti@fi.infn.i [CNISM and Department of Physics, University of Florence, 50019 Sesto Fiorentino (Italy); CNR-INFM S3 National Research Center, I-41100 Modena (Italy); Rettori, A. [CNISM and Department of Physics, University of Florence, 50019 Sesto Fiorentino (Italy); CNR-INFM S3 National Research Center, I-41100 Modena (Italy); Pini, M.G. [ISC-CNR, Via Madonna del Piano 10, I-50019 Sesto Fiorentino (Italy); Mariani, M.; Micotti, E. [Department of Physics A. Volta and CNR-INFM, University of Pavia, Via Bassi 6, I-27100 Pavia (Italy); Lascialfari, A. [Department of Physics A. Volta and CNR-INFM, University of Pavia, Via Bassi 6, I-27100 Pavia (Italy); Institute of General Physiology and Biological Chemistry, University of Milano, Via Trentacoste 2, I-20134 Milano (Italy); CNR-INFM S3 National Research Center, I-41100 Modena (Italy); Papinutto, N. [CIMeC, University of Trento, Via delle Regole, 101 38060 Mattarello (Italy); Department of Physics A. Volta and CNR-INFM, University of Pavia, Via Bassi 6, I-27100 Pavia (Italy); Amato, A. [Paul Scherrer Institute, CH-5232 Villingen PSI (Switzerland); Caneschi, A.; Gatteschi, D. [INSTM R.U. Firenze and Department of Chemistry, University of Florence, Via della Lastruccia 3, I-50019 Sesto Fiorentino (Italy); Affronte, M. [CNR-INFM S3 National Research Center, I-41100 Modena (Italy); Department of Physics, University of Modena and Reggio Emilia Via Campi 213/A, I-41100 Modena (Italy)

2010-05-15

Low-temperature magnetic susceptibility, zero-field muon spin resonance and specific heat measurements have been performed in the quasi-one-dimensional (1D) molecular helimagnetic compound Gd(hfac){sub 3}NITEt. The specific heat presents two anomalies at T{sub 0}=2.19(2)K and T{sub N}=1.88(2)K, while susceptibility and zero-field muon spin resonance show anomalies only at T{sub N}=1.88(2)K. The results suggest an experimental validation of Villain's conjecture of a two-step magnetic ordering in quasi-1D XY helimagnets: the paramagnetic phase and the helical spin solid phases are separated by a chiral spin liquid, where translational invariance is broken without violation of rotational invariance.

Promoting recovery-oriented practice in mental health services: a quasi-experimental mixed-methods study.

Science.gov (United States)

Gilburt, Helen; Slade, Mike; Bird, Victoria; Oduola, Sheri; Craig, Tom K J

2013-06-13

Recovery has become an increasingly prominent concept in mental health policy internationally. However, there is a lack of guidance regarding organisational transformation towards a recovery orientation. This study evaluated the implementation of recovery-orientated practice through training across a system of mental health services. The intervention comprised four full-day workshops and an in-team half-day session on supporting recovery. It was offered to 383 staff in 22 multidisciplinary community and rehabilitation teams providing mental health services across two contiguous regions. A quasi-experimental design was used for evaluation, comparing behavioural intent with staff from a third contiguous region. Behavioural intent was rated by coding points of action on the care plans of a random sample of 700 patients (400 intervention, 300 control), before and three months after the intervention. Action points were coded for (a) focus of action, using predetermined categories of care; and (b) responsibility for action. Qualitative inquiry was used to explore staff understanding of recovery, implementation in services and the wider system, and the perceived impact of the intervention. Semi-structured interviews were conducted with 16 intervention group team leaders post-training and an inductive thematic analysis undertaken. A total of 342 (89%) staff received the intervention. Care plans of patients in the intervention group had significantly more changes with evidence of change in the content of patient's care plans (OR 10.94. 95% CI 7.01-17.07) and the attributed responsibility for the actions detailed (OR 2.95, 95% CI 1.68-5.18). Nine themes emerged from the qualitative analysis split into two superordinate categories. 'Recovery, individual and practice', describes the perception and provision of recovery orientated care by individuals and at a team level. It includes themes on care provision, the role of hope, language of recovery, ownership and

High School Student Information Access and Engineering Design Performance

Science.gov (United States)

Mentzer, Nathan

2014-01-01

Developing solutions to engineering design problems requires access to information. Research has shown that appropriately accessing and using information in the design process improves solution quality. This quasi-experimental study provides two groups of high school students with a design problem in a three hour design experience. One group has…

Engaging High School Students in Advanced Math and Science Courses for Success in College: Is Advanced Placement the Answer?

Science.gov (United States)

Kelley-Kemple, Thomas; Proger, Amy; Roderick, Melissa

2011-01-01

The current study provides an in-depth look at Advanced Placement (AP) math and science course-taking in one school district, the Chicago Public Schools (CPS). Using quasi-experimental methods, this study examines the college outcomes of students who take AP math and science courses. Specifically, this study asks whether students who take AP math…

Impact of a critical care postgraduate certificate course on nurses' self-reported competence and confidence: A quasi-experimental study.

Science.gov (United States)

Baxter, Rebecca; Edvardsson, David

2018-06-01

Postgraduate education is said to support the development of nurses' professional competence and confidence, essential to the delivery of safe and effective care. However, there is a shortness of empirical evidence to demonstrate an increase to nurses' self-reported confidence and competence on completion of critical care postgraduate certificate-level education. To explore the impact of a critical care postgraduate certificate course on nurses' self-reported competence and confidence. To explore the psychometric properties and performance of the Critical Care Competence and Confidence Questionnaire. A quasi-experimental pre/post-test design. A total population sample of nurses completing a critical care postgraduate certificate course at an Australian University. The Critical Care Competence and Confidence Questionnaire was developed for this study to measure nurses' self-reported competence and confidence at baseline and follow up. Descriptive and inferential statistics were used to explore sample characteristics and changes between baseline and follow-up. Reliability of the questionnaire was explored using Cronbach's Alpha and item-total correlations. There was a statistically significant increase in competence and confidence between baseline and follow-up across all questionnaire domains. Satisfactory reliability estimates were found for the questionnaire. Completion of a critical care postgraduate certificate course significantly increased nurses' perceived competence and confidence. The Critical Care Competence and Confidence Questionnaire was found to be psychometrically sound for measuring nurses' self-reported competence and confidence. Copyright © 2018 Elsevier Ltd. All rights reserved.

Effects of therapeutic touch on anxiety, vital signs, and cardiac dysrhythmia in a sample of Iranian women undergoing cardiac catheterization: a quasi-experimental study.

Science.gov (United States)

Zolfaghari, Mitra; Eybpoosh, Sana; Hazrati, Maryam

2012-12-01

To investigate the effects of Therapeutic Touch (TT) on anxiety, vital signs, and cardiac dysrhythmia in women undergoing cardiac catheterization. It was a quasi-experimental study. The participants had no history of hallucination, anxiety, or other psychological problems. Participants had to be conscious and have attained at least sixth-grade literacy level. Participants were randomly assigned into an intervention group (n = 23; received 10-15 minutes TT), a placebo group (n = 23; received 10-15 minutes simulated touch), and a control group (n = 23; did not receive any therapy). Data were collected using Spielberger's anxiety test, cardiac dysrhythmia checklist, and vital signs recording sheet. Statistical analyses were considered to be significant at α = .05 levels. Sixty-nine women ranging in age from 35 to 65 years participated. TT significantly decreased state anxiety p < 0.0001 but not trait anxiety (p = .88), decreased the incidence of all cardiac dysrhythmias p < 0.0001 except premature ventricular contraction (p = .01), and regulated vital signs p < 0.0001 in the intervention group versus placebo and control group. TT is an effective approach for managing state anxiety, regulating vital signs, and decreasing the incidence of cardiac dysrhythmia during stressful situations, such as cardiac catheterization, in Iranian cardiac patients.

"Teamwork in hospitals": a quasi-experimental study protocol applying a human factors approach.

Science.gov (United States)

Ballangrud, Randi; Husebø, Sissel Eikeland; Aase, Karina; Aaberg, Oddveig Reiersdal; Vifladt, Anne; Berg, Geir Vegard; Hall-Lord, Marie Louise

2017-01-01

Effective teamwork and sufficient communication are critical components essential to patient safety in today's specialized and complex healthcare services. Team training is important for an improved efficiency in inter-professional teamwork within hospitals, however the scientific rigor of studies must be strengthen and more research is required to compare studies across samples, settings and countries. The aims of the study are to translate and validate teamwork questionnaires and investigate healthcare personnel's perception of teamwork in hospitals (Part 1). Further to explore the impact of an inter-professional teamwork intervention in a surgical ward on structure, process and outcome (Part 2). To address the aims, a descriptive, and explorative design (Part 1), and a quasi-experimental interventional design will be applied (Part 2). The study will be carried out in five different hospitals (A-E) in three hospital trusts in Norway. Frontline healthcare personnel in Hospitals A and B, from both acute and non-acute departments, will be invited to respond to three Norwegian translated teamwork questionnaires (Part 1). An inter-professional teamwork intervention in line with the TeamSTEPPS recommend Model of Change will be implemented in a surgical ward at Hospital C. All physicians, registered nurses and assistant nurses in the intervention ward and two control wards (Hospitals D and E) will be invited to to survey their perception of teamwork, team decision making, safety culture and attitude towards teamwork before intervention and after six and 12 months. Adult patients admitted to the intervention surgical unit will be invited to survey their perception of quality of care during their hospital stay before intervention and after six and 12 month. Moreover, anonymous patient registry data from local registers and data from patients' medical records will be collected (Part 2). This study will help to understand the impact of an inter-professional teamwork

Current Parental Depression and Offspring Perceived Self-Competence: A Quasi-Experimental Examination

Science.gov (United States)

Class, Quetzal A.; D’Onofrio, Brian M.; Singh, Amber L.; Ganiban, Jody M.; Spotts, E. L.; Lichtenstein, Paul; Reiss, David; Neiderhiser, Jenae M.

2013-01-01

A genetically-informed, quasi-experimental design was used to examine the genetic and environmental processes underlying associations between current parental depressive symptoms and offspring perceived self-competence. Participants, drawn from a population-based Swedish sample, were 852 twin pairs and their male (52%) and female offspring aged 15.7 ± 2.4 years. Parental depressive symptoms were measured using the Center for Epidemiological Studies Depression scale. Offspring perceived self-competence was measured using a modified Harter Perceived Competence Scale. Cousin comparisons and Children of Twins (CoT) designs suggested that associations between maternal depressive symptoms and offspring perceived self-competence were due to shared genetic/environmental liability. The mechanism responsible for father-offspring associations, however, was independent of genetic factors and of extended-family environmental factors, supporting a causal inference. Thus, mothers and fathers may impact offspring perceived self-competence via different mechanisms and unmeasured genetic and environmental selection factors must be considered when studying the intergenerational transmission of cognitive vulnerabilities for depression. PMID:22692226

Current parental depression and offspring perceived self-competence: a quasi-experimental examination.

Science.gov (United States)

Class, Quetzal A; D'Onofrio, Brian M; Singh, Amber L; Ganiban, Jody M; Spotts, E L; Lichtenstein, Paul; Reiss, David; Neiderhiser, Jenae M

2012-09-01

A genetically-informed, quasi-experimental design was used to examine the genetic and environmental processes underlying associations between current parental depressive symptoms and offspring perceived self-competence. Participants, drawn from a population-based Swedish sample, were 852 twin pairs and their male (52 %) and female offspring aged 15.7 ± 2.4 years. Parental depressive symptoms were measured using the Center for Epidemiological Studies Depression scale. Offspring perceived self-competence was measured using a modified Harter Perceived Competence Scale. Cousin comparisons and Children of Twins designs suggested that associations between maternal depressive symptoms and offspring perceived self-competence were due to shared genetic/environmental liability. The mechanism responsible for father-offspring associations, however, was independent of genetic factors and of extended family environmental factors, supporting a causal inference. Thus, mothers and fathers may impact offspring perceived self-competence via different mechanisms and unmeasured genetic and environmental selection factors must be considered when studying the intergenerational transmission of cognitive vulnerabilities for depression.

Effectiveness Of A School-Based Multicomponent Intervention On Nutritional Status Among Primary School Children In Bangkok, Thailand.

Science.gov (United States)

Chawla, Nattapon; Panza, Alessio; Sirikulchayanonta, Chutima; Kumar, Ramesh; Taneepanichskul, Surasak

2017-01-01

Childhood obesity has become a major public health issue today. The prevalence of obesity and overweight is increasing in both adults and children. Childhood obesity in Thailand has more than doubled since the 1960s and a recent study reported that overweight and obesity in Thais is the 5th highest in Asia. The present study objective was to evaluate the effectiveness of a life-skills, multicomponent, school-based intervention on child nutritional status. A quasi-experimental design was conducted in two-groups (control and intervention schools) on 453 students attending grade levels 4-5 in Bangkok. Two schools were selected for control, and two schools for intervention groups. The interventions included education, diet, physical activity (PA), food-environment, school builtenvironment, and life-skills components. Subjects were measured at baseline and at 6 months post-treatment. The intervention group had significant differences in overall healthy practices (+1.5 mean difference, p=0.048), dietary habits, physical activity, lower total cholesterol (TC) levels (-2.43 mean, p=0.019) and higher high density lipoprotein cholesterol (HDL-C) levels (+4.06 p=0.028) as compared to the control. A higher reduction of overweight individuals among the intervention group over the intervention period was observed. Physical activity and consumption of vegetables increased while consumption of high-caloric snacks and fast foods decreased in children after the intervention. This study indicated that a multidisciplinary approach in school-based interventions is most likely to be effective in preventing children from becoming overweight in the long term. More research should be conducted on school-based interventions with longer intervention periods and higher sustainability.

Effect of drug utilization reviews on the quality of in-hospital prescribing: a quasi-experimental study

Directory of Open Access Journals (Sweden)

Chabot Isabelle

2006-03-01

Full Text Available Abstract Background Drug utilization review (DUR programs are being conducted in Canadian hospitals with the aim of improving the appropriateness of prescriptions. However, there is little evidence of their effectiveness. The objective of this study was to assess the impact of both a retrospective and a concurrent DUR programs on the quality of in-hospital prescribing. Methods We conducted an interrupted time series quasi-experimental study. Using explicit criteria for quality of prescribing, the natural history of cisapride prescription was established retrospectively in three university-affiliated hospitals. A retrospective DUR was implemented in one of the hospitals, a concurrent DUR in another, whereas the third hospital served as a control. An archivist abstracted records of all patients who were prescribed cisapride during the observation period. The effect of DURs relative to the control hospital was determined by comparing estimated regression coefficients from the time series models and by testing the statistical significance using a 2-tailed Student's t test. Results The concurrent DUR program significantly improved the appropriateness of prescriptions for the indication for use whereas the retrospective DUR brought about no significant effect on the quality of prescribing. Conclusion Results suggest a retrospective DUR approach may not be sufficient to improve the quality of prescribing. However, a concurrent DUR strategy, with direct feedback to prescribers seems effective and should be tested in other settings with other drugs.

The impact of employee assistance services on workplace outcomes: Results of a prospective, quasi-experimental study.

Science.gov (United States)

Richmond, Melissa K; Pampel, Fred C; Wood, Randi C; Nunes, Ana P

2017-04-01

Employee Assistance Programs (EAPs) are widely used to help employees experiencing personal or work-related difficulties that impact work productivity. However, rigorous research on the effectiveness of programs to improve work-related outcomes is lacking. The current study represents a major advance in EAP research by using a prospective, quasi-experimental design with a large and diverse employee base. Using propensity scores calculated from demographic, social, work-related, and psychological variables collected on baseline surveys, we matched 156 employees receiving EAP to 188 non-EAP employees. Follow-up surveys were collected from 2 to 12 months post-baseline (M = 6.0). At follow-up, EAP employees had significantly greater reductions in absenteeism (b = -.596, p = .001) and presenteeism (b = -.217, p = .038), but not workplace distress (b = -.079, p = .448), than did non-EAP employees. Tests of moderation of baseline alcohol use, depression, anxiety, and productivity indicate that for the most part, the program works equally well for all groups. However, EAP did more to reduce absenteeism for those who began with lower severity of depression and anxiety at baseline. Results provide the scientific rigor needed to demonstrate EAP impact on improved work outcomes. In the first study of its kind, findings confirm the value of EAPs to help employees address personal and work-related concerns that are affecting job performance. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Physical education, school physical activity, school sports and academic performance

Directory of Open Access Journals (Sweden)

Shephard Roy J

2008-02-01

Full Text Available Abstract Background The purpose of this paper is to review relationships of academic performance and some of its determinants to participation in school-based physical activities, including physical education (PE, free school physical activity (PA and school sports. Methods Linkages between academic achievement and involvement in PE, school PA and sport programmes have been examined, based on a systematic review of currently available literature, including a comprehensive search of MEDLINE (1966 to 2007, PSYCHINFO (1974 to 2007, SCHOLAR.GOOGLE.COM, and ERIC databases. Results Quasi-experimental data indicate that allocating up to an additional hour per day of curricular time to PA programmes does not affect the academic performance of primary school students negatively, even though the time allocated to other subjects usually shows a corresponding reduction. An additional curricular emphasis on PE may result in small absolute gains in grade point average (GPA, and such findings strongly suggest a relative increase in performance per unit of academic teaching time. Further, the overwhelmingly majority of such programmes have demonstrated an improvement in some measures of physical fitness (PF. Cross-sectional observations show a positive association between academic performance and PA, but PF does not seem to show such an association. PA has positive influences on concentration, memory and classroom behaviour. Data from quasi-experimental studies find support in mechanistic experiments on cognitive function, pointing to a positive relationship between PA and intellectual performance. Conclusion Given competent providers, PA can be added to the school curriculum by taking time from other subjects without risk of hindering student academic achievement. On the other hand, adding time to "academic" or "curricular" subjects by taking time from physical education programmes does not enhance grades in these subjects and may be detrimental to health.

SEMICONDUCTOR INTEGRATED CIRCUITS: A quasi-3-dimensional simulation method for a high-voltage level-shifting circuit structure

Science.gov (United States)

Jizhi, Liu; Xingbi, Chen

2009-12-01

A new quasi-three-dimensional (quasi-3D) numeric simulation method for a high-voltage level-shifting circuit structure is proposed. The performances of the 3D structure are analyzed by combining some 2D device structures; the 2D devices are in two planes perpendicular to each other and to the surface of the semiconductor. In comparison with Davinci, the full 3D device simulation tool, the quasi-3D simulation method can give results for the potential and current distribution of the 3D high-voltage level-shifting circuit structure with appropriate accuracy and the total CPU time for simulation is significantly reduced. The quasi-3D simulation technique can be used in many cases with advantages such as saving computing time, making no demands on the high-end computer terminals, and being easy to operate.

Flipped Instruction in a High School Science Classroom

Science.gov (United States)

Leo, Jonathan; Puzio, Kelly

2016-10-01

This paper reports on a quasi-experimental study examining the effectiveness of flipped instruction in a 9th grade biology classroom. This study included four sections of freshmen-level biology taught by the first author at a private secondary school in the Pacific Northwest. Using a block randomized design, two sections were flipped and two remained traditional. The quiz and posttest data were adjusted for pretest differences using ANCOVA. The results suggest that flipped instruction had a positive effect student achievement, with effect sizes ranging from +0.16 to +0.44. In addition, some students reported that they preferred watching video lectures outside of class and appreciated more active approaches to learning.

Effect of an intervention mapping approach to promote the consumption of fruits and vegetables among young adults in junior college: A quasi-experimental study.

Science.gov (United States)

Boucher, Danielle; Gagné, Camille; Côté, Françoise

2015-01-01

This study evaluates the effectiveness of an intervention mapping developed to promote fruit and vegetable consumption. Students (n = 394) from two similar public colleges in the Quebec City area (Canada) were asked to participate. A quasi-experimental design was used with a 14-week pause between the pretest and posttest. The control and experimental groups both received information on Canada's Food Guide recommendations. The experimental group was submitted to an intervention consisting of six interactive workshops carried out inside the college, and three personal exercises to be completed at home. proportion of respondents consuming at least five servings of fruits and vegetables daily. psychosocial variables assessed (theory of planned behaviour). The data collected from 344 participants by means of a self-administered questionnaire were analysed (167 experimental and 177 control). The posttest revealed a significant increase (15%) in the number of participants in the experimental group achieving the primary outcome (d = .38). The intervention also had a significant effect on the targeted psychosocial variables (η(2) = .03 to .06). Regularity of consumption acts as a mediator between intention and behaviour. These results may be used to guide health promoters working with college students.

Implementation of a Care Pathway for Primary Palliative Care in 5 research clusters in Belgium: quasi-experimental study protocol and innovations in data collection (pro-SPINOZA).

Science.gov (United States)

Leysen, Bert; Van den Eynden, Bart; Gielen, Birgit; Bastiaens, Hilde; Wens, Johan

2015-09-28

Starting with early identification of palliative care patients by general practitioners (GPs), the Care Pathway for Primary Palliative Care (CPPPC) is believed to help primary health care workers to deliver patient- and family-centered care in the last year of life. The care pathway has been pilot-tested, and will now be implemented in 5 Belgian regions: 2 Dutch-speaking regions, 2 French-speaking regions and the bilingual capital region of Brussels. The overall aim of the CPPPC is to provide better quality of primary palliative care, and in the end to reduce the hospital death rate. The aim of this article is to describe the quantitative design and innovative data collection strategy used in the evaluation of this complex intervention. A quasi-experimental stepped wedge cluster design is set up with the 5 regions being 5 non-randomized clusters. The primary outcome is reduced hospital death rate per GPs' patient population. Secondary outcomes are increased death at home and health care consumption patterns suggesting high quality palliative care. Per research cluster, GPs will be recruited via convenience sampling. These GPs -volunteering to be involved will recruit people with reduced life expectancy and their informal care givers. Health care consumption data in the last year of life, available for all deceased people having lived in the research clusters in the study period, will be used for comparison between patient populations of participating GPs and patient populations of non-participating GPs. Description of baseline characteristics of participating GPs and patients and monitoring of the level of involvement by GPs, patients and informal care givers will happen through regular, privacy-secured web-surveys. Web-survey data and health consumption data are linked in a secure way, respecting Belgian privacy laws. To evaluate this complex intervention, a quasi-experimental stepped wedge cluster design has been set up. Context characteristics and involvement

Children's Understanding of Experimental Contrast and Experimental Control: An Inventory for Primary School

Science.gov (United States)

Osterhaus, Christopher; Koerber, Susanne; Sodian, Beate

2015-01-01

Experimentation skills are a central component of scientific thinking, and many studies have investigated whether and when primary-school children develop adequate experimentation strategies. However, the answers to these questions vary substantially depending on the type of task that is used: while discovery tasks, which require children to…

School-based health promotion and physical activity during and after school hours.

Science.gov (United States)

Vander Ploeg, Kerry A; McGavock, Jonathan; Maximova, Katerina; Veugelers, Paul J

2014-02-01

Comprehensive school health (CSH) is a multifaceted approach to health promotion. A key objective of CSH is to foster positive health behaviors outside of school. This study examined the 2-year change in physical activity during and after school among students participating in a CSH intervention in Edmonton, Alberta, Canada. This was a quasi-experimental, pre-post trial with a parallel, nonequivalent control group. Intervention schools had to be located in socioeconomically disadvantaged neighborhoods. In the spring of 2009 and 2011, pedometer recordings (7 full days) and demographic data were collected from cross-sectional samples of fifth grade students from 10 intervention schools and 20 comparison schools. A total of 1157 students participated in the study. Analyses were adjusted for potential confounders and the clustered design. Relative to 2009, children in 2011 were more active on schools days (1172 steps per day; P affect children's physical activity during and outside of school. Results of this study justify broader implementation of effective CSH interventions for physical activity promotion and obesity prevention in the long term.

Exploring the Effects of Active Learning on High School Students' Outcomes and Teachers' Perceptions of Biotechnology and Genetics Instruction

Science.gov (United States)

Mueller, Ashley L.; Knobloch, Neil A.; Orvis, Kathryn S.

2015-01-01

Active learning can engage high school students to learn science, yet there is limited understanding if active learning can help students learn challenging science concepts such as genetics and biotechnology. This quasi-experimental study explored the effects of active learning compared to passive learning regarding high school students'…

The Effects of Financial Aid in High School on Academic and Labor Market Outcomes: A Quasi-Experimental Study

DEFF Research Database (Denmark)

Humlum, Maria Knoth; Vejlin, Rune Majlund

We investigate the effects of financial aid on student employment and academic outcomes in high school. We exploit administrative differences in the amount of financial aid received based on timing of birth to identify the causal effects of interest. Specifically, individuals born early...... in a quarter receive less financial aid than comparable individuals born late in the previous quarter. We find that receiving less aid induces individuals to work more during high school. However, we do not find any evidence that receiving less financial aid and thereby working more is associated with any...

Psychological recovery after intensive care: Outcomes of a long-term quasi-experimental study of structured nurse-led follow-up.

Science.gov (United States)

Jónasdóttir, Rannveig J; Jónsdóttir, Helga; Gudmundsdottir, Berglind; Sigurdsson, Gisli H

2018-02-01

To compare psychological recovery of patients receiving structured nurse-led follow-up and patients receiving usual care after intensive care discharge. Quasi-experimental study. Single centre, university hospital, mixed intensive care patient population. Symptoms of post-traumatic stress disorder, anxiety and depression measured three and four times over 12 months after intensive care discharge. Disturbing memories of the intensive care stay and psychological reactions (that one's life was in danger, threat to physical integrity, intense fear, helplessness, horror) three months after intensive care. A mixed effect model tested differences between the groups over time and regression model predicted post-traumatic stress at three months. The experimental group had significantly more symptoms of post-traumatic stress and anxiety than the control group over the 12 months. Patients from both groups had severe symptoms of post-traumatic stress. Patients with post-traumatic stress at three months had disturbing memories and psychological reactions. The structured nurse-led follow-up did not improve patients' measured outcomes of psychological recovery after intensive care. Patients with severe symptoms of post-traumatic stress are of concern. Emphasis needs to be placed on disturbing memories of the intensive care stay and psychological reactions when constructing intensive care nurse-led follow-up. Copyright © 2017 Elsevier Ltd. All rights reserved.

Experimentation with psychoactive substances by public school students

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Maria Eliane de Andrade

2017-09-01

Full Text Available ABSTRACT OBJECTIVE To analyze the prevalence of exposure to psychoactive substances in public students of basic education and its association with sociodemographic characteristics. METHODS This is a cross-sectional survey conducted from March to September 2015, involving 1,009 students of the basic and high school education in 20 public schools in the municipality of Aracaju, State of Sergipe, Brazil. The data have been compiled using questionnaires previously applied in national studies of the Brazilian Center for Psychotropic Drugs. The variables have been dichotomized for later logistic regression using the Chi-square test to analyze associations between experimentation with psychoactive substances and other sociodemographic variables; odds ratio and confidence intervals have also been calculated. The level of significance adopted was 5%. RESULTS We have identified that 69.6% of the students have experimented alcohol and 12.4% cigarettes. Age (≥ 15 years has shown a significant association with experimentation with alcohol (p < 0.001 and cigarettes (p = 0.02, acting as risk factor in both cases (OR = 2.34 and 1, 78, respectively, but it acted as a protective factor for the use of inhalants (p = 0.03 and OR = 0.58 and weight loss medication (p = 0.006 and OR = 0.44. Religious practice had a significant association with experimentation with alcohol (p = 0.01, functioning as a protective factor (OR = 0.56. CONCLUSIONS We have concluded that the psychoactive substance most experienced by students was alcohol, followed by cigarettes, and chance for experimentation increases after the age of 15. Religious practice, in turn, acts as a protective factor for experimentation with alcohol.

Reducing pressure ulcers in patients with prolonged acute mechanical ventilation: a quasi-experimental study.

Science.gov (United States)

Loudet, Cecilia Inés; Marchena, María Cecilia; Maradeo, María Roxana; Fernández, Silvia Laura; Romero, María Victoria; Valenzuela, Graciela Esther; Herrera, Isabel Eustaquia; Ramírez, Martha Teresa; Palomino, Silvia Rojas; Teberobsky, Mariana Virginia; Tumino, Leandro Ismael; González, Ana Laura; Reina, Rosa; Estenssoro, Elisa

2017-01-01

To determine the effectiveness of a quality management program in reducing the incidence and severity of pressure ulcers in critical care patients. This was a quasi-experimental, before-and-after study that was conducted in a medical-surgical intensive care unit. Consecutive patients who had received mechanical ventilation for ≥ 96 hours were included. A "Process Improvement" team designed a multifaceted interventional process that consisted of an educational session, a pressure ulcer checklist, a smartphone application for lesion monitoring and decision-making, and a "family prevention bundle". Fifty-five patients were included in Pre-I group, and 69 were included in the Post-I group, and the incidence of pressure ulcers in these groups was 41 (75%) and 37 (54%), respectively. The median time for pressure ulcers to develop was 4.5 [4 - 5] days in the Pre-I group and 9 [6 - 20] days in the Post-I group after admission for each period. The incidence of advanced-grade pressure ulcers was 27 (49%) in the Pre-I group and 7 (10%) in the Post-I group, and finally, the presence of pressure ulcers at discharge was 38 (69%) and 18 (26%), respectively (p pressure ulcers. The duration of mechanical ventilation and the presence of organ failure were positively associated with the development of pressure ulcers, while the multifaceted intervention program acted as a protective factor. A quality program based on both a smartphone application and family participation can reduce the incidence and severity of pressure ulcers in patients on prolonged acute mechanical ventilation.

Experimental Study of a Multi Level Overtopping Wave Power Device

DEFF Research Database (Denmark)

Kofoed, Jens Peter; Hald, Tue; Frigaard, Peter Bak

2002-01-01

Results of experimental investigations of a floating wave energy device called Power Pyramid is presented. The Power Pyramid utilizes reservoirs in multiple levels when capturing wave overtopping and converting it into electrical energy. The effect of capturing the overtopping in multiple levels,......, using 5 levels introduces practical problems, and is most probably not economically feasible. It is concluded that it is reasonable to use 2 levels (maybe 3), which can increase the efficiency by 25-40 % compared to using a single level.......Results of experimental investigations of a floating wave energy device called Power Pyramid is presented. The Power Pyramid utilizes reservoirs in multiple levels when capturing wave overtopping and converting it into electrical energy. The effect of capturing the overtopping in multiple levels......, compared to only one level, has been evaluated experimentally. From the experimental results, and the performed optimizations based on these, it has been found that the efficiency of a wave power device of the overtopping type can be increased by as much as 76 % by using 5 levels instead of 1. However...

The Effects of Teacher and Teacher-librarian High-end Collaboration on Inquiry-based Project Reports and School Monthly Test Scores of Fifth-grade Students

OpenAIRE

Hai-Hon Chen

2015-01-01

The purpose of this study was twofold. The first purpose was to establish the high level collaboration of integrated instruction model between social studies teacher and teacher-librarian. The second purpose was to investigate the effects of high-end collaboration on the individual and groups’ inquiry-based project reports, as well as monthly test scores of fifth-grade students. A quasi-experimental method was adopted, two classes of elementary school fifth graders in Tainan Municipal city, T...

Experimental Results on the Level Crossing Intervals of the Phase of Sine Wave Plus Noise

Science.gov (United States)

Youssef, Neji; Munakata, Tsutomu; Mimaki, Tadashi

1993-03-01

Experimental study was made on the level crossing intervals of a phase process of a sine wave plus narrow-band Gaussian noise. Since successive level crossings of phase do not necessarily occur alternately in the upward and downward direction due to the phase jump beyond 2π, the usual definitions of the probability densities of the level crossing intervals for continuous random processes are not applicable in the case of the phase process. Therefore, the probability densities of level crossing intervals of phase process are newly defined. Measurements of these densities were performed for noise having lowpass spectra of Gaussian and 7th order Butterworth types. Results are given for various values of the signal-to-noise power ratio and of the crossing level, and compared with corresponding approximation developed under the assumption of quasi-independence. The validity of the assumption depends on the spectrum shape of the noise.

Enhancement of oscillation characteristics of a gyrotron by a built-in quasi-optical mode converter

International Nuclear Information System (INIS)

Hayashi, Kenichi; Mitsunaka, Yoshika; Komuro, Mitsuo

1994-01-01

Oscillation characteristics are analyzed experimentally and numerically by using two gyrotrons with a power level of 500 kW, a conventional tube and a tube with a built-in quasi-optical mode converter. Both tubes have a 120 GHz, TE 12,2 cavity of the same geometry and a single disk alumina window. The quasi-optical mode converter consists of an α-cut launcher and five mirrors. In the conventional tube, reflection of the competing mode at the output window prevents the main mode from oscillating stably in the operation region predicted by the design. Mode selectivity of the quasi-optical mode converter removes the influence of the reflection on the oscillation. Consequently, the experimental results in the tube with the quasi-optical mode converter are in good agreement with the design values. (author)

Effect of music care on depression and behavioral problems in elderly people with dementia in Taiwan: a quasi-experimental, longitudinal study.

Science.gov (United States)

Wang, Su-Chin; Yu, Ching-Len; Chang, Su-Hsien

2017-02-01

The purpose was to examine the effectiveness of music care on cognitive function, depression, and behavioral problems among elderly people with dementia in long-term care facilities in Taiwan. The study had a quasi-experimental, longitudinal research design and used two groups of subjects. Subjects were not randomly assigned to experimental group (n = 90) or comparison group (n = 56). Based on Bandura's social cognition theory, subjects in the experimental group received Kagayashiki music care (KMC) twice per week for 24 weeks. Subjects in the comparison group were provided with activities as usual. Results found, using the control score of the Clifton Assessment Procedures for the Elderly Behavior Rating Scale (baseline) and time of attending KMC activities as a covariate, the two groups of subjects had statistically significant differences in the mini-mental state examination (MMSE). Results also showed that, using the control score of the Cornell Scale for Depression in Dementia (baseline) and MMSE (baseline) as a covariate, the two groups of subjects had statistically significant differences in the Clifton Assessment Procedures for the Elderly Behavior Rating Scale. These findings provide information for staff caregivers in long-term care facilities to develop a non-invasive care model for elderly people with dementia to deal with depression, anxiety, and behavioral problems.

The impact of simulation-based learning on students' English for Nursing Purposes (ENP) reading proficiency: a quasi-experimental study.

Science.gov (United States)

Chang, Hsiao-Yun Annie; Chan, Luke; Siren, Betty

2013-06-01

This is a report of a study which evaluated simulation-based learning as a teaching strategy for improving participants' ENP reading proficiency in the senior college program of students whose first language is Chinese, not English. Simulation-based learning is known to be one of most effective teaching strategies in the healthcare professional curricula, which brings a clinical setting into the classroom. However, developing English reading skills for English written nursing journals through simulation-based learning in the nursing curricula, is largely unknown. We used a quasi-experimental approach with nonequivalent control group design to collect the causal connections between intervention and outcomes. 101 students were enrolled in this study (response rate 92.6%) of these 48 students volunteered for the intervention group, and 53 students for the control group. The findings indicated that the intervention group had significantly higher mean scores in ENP reading proficiency with unknown words in the article (p=.004), vocabulary (pdesigned research and a universal method of outcome measurement. Copyright © 2012 Elsevier Ltd. All rights reserved.

Helping rural women in Pakistan to prevent postpartum hemorrhage: A quasi experimental study

Directory of Open Access Journals (Sweden)

Mir Ali

2012-10-01

Full Text Available Abstract Background According to the Pakistan Demographic and Health Survey from 2006–2007, the maternal mortality ratio in rural areas is 319 per 100,000 live births. Postpartum hemorrhage is the leading cause of maternal deaths in Pakistan. The objectives of the study were to document the feasibility of distribution of misoprostol tablets by community-based providers mainly traditional birth attendants and acceptability and use of misoprostol by women who gave birth at home. Methods A quasi-experimental design, comprising intervention and comparison areas, was used to document the acceptability of providing misoprostol tablets to pregnant women to prevent postpartum hemorrhage in the rural community setting in Pakistan. Data were collected using structured questionnaires administered to women before and after delivery at home and their birth attendants. Results Out of 770 women who delivered at home, 678 (88% ingested misoprostol tablets and 647 (84% ingested the tablets after the birth of the neonate but prior to the delivery of the placenta. The remaining women took misoprostol tablets after delivery of the placenta. Side effects were experienced by 40% of women and were transitory in nature. Among women who delivered at home, 80% said that they would use misoprostol tablets in the future and 74% were willing to purchase them in the future. Conclusions Self-administration of misoprostol in the home setting is feasible. Community-based providers, such as traditional birth attendants and community midwives with proper training and counseling, play an important role in reducing postpartum hemorrhage. Proper counseling and information exchange are helpful for introducing new practices in resource-constrained rural communities. Until such a time that skilled birth attendance is made more universally available in the rural setting, alternative strategies, such as training and using the services of traditional birth attendants to provide safe

Prophylactic Dextrose Gel Does Not Prevent Neonatal Hypoglycemia: A Quasi-Experimental Pilot Study.

Science.gov (United States)

Coors, Sarah M; Cousin, Joshua J; Hagan, Joseph L; Kaiser, Jeffrey R

2018-03-28

To test the hypothesis that prophylactic dextrose gel administered to newborn infants at risk for hypoglycemia will increase the initial blood glucose concentration after the first feeding and decrease neonatal intensive care unit (NICU) admissions for treatment of asymptomatic neonatal hypoglycemia compared with feedings alone. This quasi-experimental study allocated asymptomatic at-risk newborn infants (late preterm, birth weight 4000 g, and infants of mothers with diabetes) to receive prophylactic dextrose gel (Insta-Glucose; Valeant Pharmaceuticals North America LLC, Bridgewater, New Jersey); other at-risk infants formed the control group. After the initial feeding, the prophylactic group received dextrose gel (0.5 mL/kg) rubbed into the buccal mucosa. The blood glucose concentration was checked 30 minutes later. Initial glucose concentrations and rate of NICU admissions were compared between the prophylactic group and controls using bivariate analyses. A multivariable linear regression compared first glucose concentrations between groups, adjusting for at-risk categories and age at first glucose concentration. There were 236 subjects (72 prophylactic, 164 controls). The first glucose concentration was not different between the prophylactic and control groups in bivariate analysis (52.1 ± 17.1 vs 50.5 ± 15.3 mg/dL, P = .69) and after adjusting for covariates (P  = .18). Rates of NICU admission for treatment of transient neonatal hypoglycemia were 9.7% and 14.6%, respectively (P = .40). Prophylactic dextrose gel did not reduce transient neonatal hypoglycemia or NICU admissions for hypoglycemia. The carbohydrate concentration of Insta-Glucose (77%) may have caused a hyperinsulinemic response, or alternatively, exogenous enteral dextrose influences glucose homeostasis minimally during the first few hours when counter-regulatory mechanisms are especially active. ClinicalTrials.gov: NCT02523222. Copyright © 2018 Elsevier Inc. All

The effectiveness of the Allen Carr smoking cessation training in companies tested in a quasi-experimental design

NARCIS (Netherlands)

Dijkstra, Arie; Zuidema, Rixt; Vos, Diederick; van Kalken, Marike

2014-01-01

Background: The Allen Carr training (ACt) is a popular one-session smoking cessation group training that is provided by licensed organizations that have the permission to use the Allen Carr method. However, few data are available on the effectiveness of the training. Methods: In a quasi-experimental

How supportive supervision influences immunization session site practices: a quasi-experimental study in Odisha, India.

Science.gov (United States)

Panda, Bhuputra; Pati, Sanghamitra; Nallala, Srinivas; Chauhan, Abhimanyu S; Anasuya, Anita; Som, Meena; Zodpey, Sanjay

2015-01-01

Routine immunization (RI) is a key child survival intervention. Ensuring acceptable standards of RI service delivery is critical for optimal outcomes. Accumulated evidences suggest that 'supportive supervision' improves the quality of health care services in general. During 2009-2010, the Government of Odisha and UNICEF jointly piloted this strategy in four districts to improve RI program outcomes. The present study aims to assess the effect of this strategy on improvement of skills and practices at immunization session sites. A quasi-experimental 'post-test only' study design was adopted to compare the opinion and practices of frontline health workers and their supervisors in four intervention districts (IDs) with two control districts (CDs). Altogether, we interviewed 111 supervisor-supervisee (health worker) pairs using semi-structured interview schedules and case vignettes. We also directly observed health workers' practices during immunization sessions at 111 sites. Data were analyzed with SPSS version 16.0. The mean knowledge score of supervisors in CDs was significantly higher than in intervention groups. Variegated responses were obtained on case vignettes. The control group performed better in solving certain hypothetically asked problems, whereas the intervention group scored better in others. Health workers in IDs gave a lower rating to their respective supervisors' knowledge, skill, and frequency of supervision. Logistics and vaccine availability were better in CDs. Notwithstanding other limitations, supportive supervision may not have independent effects on improving the quality of immunization services. Addressing systemic issues, such as the availability of essential logistics, supply chain management, timely indenting, and financial resources, could complement the supportive supervision strategy in improving immunization service delivery.

The quasi-equilibrium response of MOS structures: Quasi-static factor

Science.gov (United States)

Okeke, M.; Balland, B.

1984-07-01

The dynamic response of a MOS structure driven into a non-equilibrium behaviour by a voltage ramp is presented. In contrast to Khun's quasi-static technique it is shown that any ramp-driven MOS structure has some degree of non-equilibrium. A quasi staticity factor μAK which serves as a measure of the degree of quasi-equilibrium, has been introduced for the first time. The mathematical model presented in the paper allows a better explanation of the experimental recordings. It is shown that this model could be used to analyse the various features of the response of the structure and that such physical parameters as the generation-rate, trap activation energy, and the effective capture constants could be obtained.

A Simulation Study of Threats to Validity in Quasi-Experimental Designs: Interrelationship between Design, Measurement, and Analysis.

Science.gov (United States)

Holgado-Tello, Fco P; Chacón-Moscoso, Salvador; Sanduvete-Chaves, Susana; Pérez-Gil, José A

2016-01-01

The Campbellian tradition provides a conceptual framework to assess threats to validity. On the other hand, different models of causal analysis have been developed to control estimation biases in different research designs. However, the link between design features, measurement issues, and concrete impact estimation analyses is weak. In order to provide an empirical solution to this problem, we use Structural Equation Modeling (SEM) as a first approximation to operationalize the analytical implications of threats to validity in quasi-experimental designs. Based on the analogies established between the Classical Test Theory (CTT) and causal analysis, we describe an empirical study based on SEM in which range restriction and statistical power have been simulated in two different models: (1) A multistate model in the control condition (pre-test); and (2) A single-trait-multistate model in the control condition (post-test), adding a new mediator latent exogenous (independent) variable that represents a threat to validity. Results show, empirically, how the differences between both the models could be partially or totally attributed to these threats. Therefore, SEM provides a useful tool to analyze the influence of potential threats to validity.

Experimental measurements of competition between fundamental and second harmonic emission in a quasi-optical gyrotron

International Nuclear Information System (INIS)

Alberti, S.; Pedrozzi, M.; Tran, M.Q.; Hogge, J.P.; Tran, T.M.; Muggli, P.; Joedicke, B.; Mathews, H.G.

1990-04-01

A quasi-optical gyrotron (QOG) designed for operation at the fundamental (Ω ce ≅100 GHz) exhibits simultaneous emission at Ω ce and 2Ω ce (second harmonic). For a beam current of 4 A, 20% of the total RF power is emitted at the second harmonic. The experimental measurements show that the excitation of the second harmonic is only possible when the fundamental is present. The frequency of the second harmonic is locked by the frequency of the fundamental. Experimental evidence shows that when the second harmonic is not excited, total efficiency is enhanced. (author) 6 refs., 5 figs., 1 tab

Reducing salt in bread: a quasi-experimental feasibility study in a bakery in Lima, Peru.

Science.gov (United States)

Saavedra-Garcia, Lorena; Sosa-Zevallos, Vanessa; Diez-Canseco, Francisco; Miranda, J Jaime; Bernabe-Ortiz, Antonio

2016-04-01

To explore salt content in bread and to evaluate the feasibility of reducing salt contained in 'pan francés' bread. The study had two phases. Phase 1, an exploratory phase, involved the estimation of salt contained in bread as well as a triangle taste test to establish the amount of salt to be reduced in 'pan francés' bread without detection by consumers. In Phase 2, a quasi-experimental, pre-post intervention study assessed the effects of the introduction of low-salt bread on bakery sales. A municipal bakery in Miraflores, Lima, Peru. Sixty-five clients of the bakery in Phase 1 of the study; sales to usual costumers in Phase 2. On average, there was 1·25 g of salt per 100 g of bread. Sixty-five consumers were enrolled in the triangle taste test: fifty-four (83·1 %) females, mean age 58·9 (sd 13·7) years. Based on taste, bread samples prepared with salt reductions of 10 % (P=0·82) and 20 % (P=0·37) were not discernible from regular bread. The introduction of bread with 20 % of salt reduction, which contained 1 g of salt per 100 g of bread, did not change sales of 'pan francés' (P=0·70) or other types of bread (P=0·36). Results were consistent when using different statistical techniques. The introduction of bread with a 20 % reduction in salt is feasible without affecting taste or bakery sales. Results suggest that these interventions are easily implementable, with the potential to contribute to larger sodium reduction strategies impacting the population's cardiovascular health.

Effects of constructivist teaching methods on bioethics education for nursing students: a quasi-experimental study.

Science.gov (United States)

Choe, Kwisoon; Park, Sunghee; Yoo, So Yeon

2014-05-01

In order to help nurses advocate for the patient's human rights and ensure respect for life in clinical situations, it is of utmost importance to improve nursing students' capacity to make ethical decisions. This study compares the effects of two constructivist teaching strategies (action learning and cross-examination debate) on nursing students' recognition of bioethical issues, experience of bioethical issues, and attainment of ethical competence. This study used a quasi-experimental (two-group pretest-posttest) design. A nursing college in South Korea. A total of 93 Korean nursing students participated in the study (46 in the action learning group and 47 in the cross-examination debate group). Participants took a bioethics class employing one or the other of the strategies mentioned, 2h a week for 15 weeks. All participants responded twice to a set of questionnaires, at the beginning of the first session and at the end of the last session. After their bioethics education, the students' recognition of bioethical issues improved for both classes; however, the knowledge of students who had participated in action learning improved more than that of the students in the debate-based class. Students in both groups reported more experience of bioethics and exposure to better-quality instruction in bioethics after their classes than previously. Students in both groups also reported improved ethical competency after this education. Positive effects of action learning and cross-examination debate implemented as teaching strategies on nursing students' understanding of bioethical issues and their ethical competency were identified; these findings will be important in the essential task of teaching bioethics to nursing students in order to foster more ethical decision-making and other ethical behavior. © 2013.

Experimental study of strain prediction on wave induced structures using modal decomposition and quasi static Ritz vectors

DEFF Research Database (Denmark)

Skafte, Anders; Kristoffersen, Julie; Vestermark, Jonas

2017-01-01

into two parts using complementary filters: Low frequency response caused by the quasi-static effect of the waves acting on the structure, and the high frequency response given by the modal properties of the structure. The high frequency response is then decomposed into modal coordinates using...... the experimental mode shapes. Strain histories are predicted by multiplying the modal coordinates with the expanded strain mode shapes. The low frequency response is decomposed using Ritz-vectors corresponding to the shapes that the structure vibrates with due to the wave loading. Strain Ritz......-vectors are then extracted from the finite element model by applying a load corresponding to a representative wave and the strain history for the low frequency response is found by multiplying the decomposed signal with the strain Ritz-vectors. Finally the combined strain history is found by adding the strain histories from...

Whatever Happened to School-Based Assessment in England's GCSEs and A Levels?

Science.gov (United States)

Opposs, Dennis

2016-01-01

For the past 30 years, school-based assessment (SBA) has been a major feature of GCSEs and A levels, the main school examinations in England. SBA has allowed teachers to allocate marks to their students for the level of skills that they show in their work. Such skills include for example, experimental techniques in science, performance in drama…

Examining pitch and numerical magnitude processing in congenital amusia: A quasi-experimental pilot study.

Science.gov (United States)

Nunes-Silva, Marilia; Moura, Ricardo; Lopes-Silva, Júlia Beatriz; Haase, Vitor Geraldi

2016-08-01

Congenital amusia is a developmental disorder associated with deficits in pitch height discrimination or in integrating pitch sequences into melodies. This quasi-experimental pilot study investigated whether there is an association between pitch and numerical processing deficits in congenital amusia. Since pitch height discrimination is considered a form of magnitude processing, we investigated whether individuals with amusia present an impairment in numerical magnitude processing, which would reflect damage to a generalized magnitude system. Alternatively, we investigated whether the numerical processing deficit would reflect a disconnection between nonsymbolic and symbolic number representations. This study was conducted with 11 adult individuals with congenital amusia and a control comparison group of 6 typically developing individuals. Participants performed nonsymbolic and symbolic magnitude comparisons and number line tasks. Results were available from previous testing using the Montreal Battery of Evaluation of Amusia (MBEA) and a pitch change detection task (PCD). Compared to the controls, individuals with amusia exhibited no significant differences in their performance on both the number line and the nonsymbolic magnitude tasks. Nevertheless, they showed significantly worse performance on the symbolic magnitude task. Moreover, individuals with congenital amusia, who presented worse performance in the Meter subtest, also presented less precise nonsymbolic numerical representation. The relationship between meter and nonsymbolic numerical discrimination could indicate a general ratio processing deficit. The finding of preserved nonsymbolic numerical magnitude discrimination and mental number line representations, with impaired symbolic number processing, in individuals with congenital amusia indicates that (a) pitch height and numerical magnitude processing may not share common neural representations, and (b) in addition to pitch processing, individuals with

Evaluation of school-based reproductive health education program for adolescent girls.

Science.gov (United States)

Golbasi, Zehra; Taskin, Lale

2009-01-01

To evaluate the effectiveness of school-based reproductive health education for adolescent girls on the reproductive knowledge level of the girls. This research was carried out as a quasi-experimental study at two vocational girls high schools, one of which was used as the study school and the other as the control school. The study group (97 students) consisted of three classes representing every grade. The control group consisted of students selected likewise (92 students). Reproductive health education was given to students in the study group for 10 weeks; the control group was not subjected to any educational program. The impact of the program was evaluated with reproductive health knowledge test designed for this study. A pretest evaluated baseline knowledge, and a posttest measured the gain in knowledge. Baseline knowledge score of students in study and control group were similar and low (p > 0.05). We found that the reproductive health knowledge level of students in the study group increased significantly after the program of education. Post-test knowledge scores (75.03 +/- 13.82) of the students in the study group were higher than those of the control group (36.65 +/- 14.17). The results showed students' low baseline knowledge and a good ability to learn. A school-based reproductive health education is needed to promote knowledge and prevention in reproductive health among teenagers.

The Impact of Regression to the Mean on Economic Evaluation in Quasi-Experimental Pre-Post Studies: The Example of Total Knee Replacement Using Data from the Osteoarthritis Initiative.

Science.gov (United States)

Schilling, Chris; Petrie, Dennis; Dowsey, Michelle M; Choong, Peter F; Clarke, Philip

2017-12-01

Many treatments are evaluated using quasi-experimental pre-post studies susceptible to regression to the mean (RTM). Ignoring RTM could bias the economic evaluation. We investigated this issue using the contemporary example of total knee replacement (TKR), a common treatment for end-stage osteoarthritis of the knee. Data (n = 4796) were obtained from the Osteoarthritis Initiative database, a longitudinal observational study of osteoarthritis. TKR patients (n = 184) were matched to non-TKR patients, using propensity score matching on the predicted hazard of TKR and exact matching on osteoarthritis severity and health-related quality of life (HrQoL). The economic evaluation using the matched control group was compared to the standard method of using the pre-surgery score as the control. Matched controls were identified for 56% of the primary TKRs. The matched control HrQoL trajectory showed evidence of RTM accounting for a third of the estimated QALY gains from surgery using the pre-surgery HrQoL as the control. Incorporating RTM into the economic evaluation significantly reduced the estimated cost effectiveness of TKR and increased the uncertainty. A generalized ICER bias correction factor was derived to account for RTM in cost-effectiveness analysis. RTM should be considered in economic evaluations based on quasi-experimental pre-post studies. Copyright © 2017 John Wiley & Sons, Ltd. Copyright © 2017 John Wiley & Sons, Ltd.

Do Ethnic Enclaves Impede Immigrants’ Integration? Evidence from a Quasi-Experimental Social-Interaction Approach

OpenAIRE

Danzer, A. M.; Yaman, F.

2013-01-01

It is widely debated whether immigrants who live among co-ethnics are less willing to integrate into the host society. Exploiting the quasi-experimental guest worker placement across German regions during the 1960/70s as well as information on immigrants’ inter-ethnic contact networks and social activities, we are able to identify the causal effect of ethnic concentration on social integration. The exogenous placement of immigrants "switches off" observable and unobservable differences in t...

A theory-based educational intervention targeting nurses' attitudes and knowledge concerning cancer-related pain management: A study protocol of a quasi-experimental design

Directory of Open Access Journals (Sweden)

Gustafsson Markus

2011-09-01

Full Text Available Abstract Background Pain is one of the most frequent problems among patients diagnosed with cancer. Despite the availability of effective pharmacological treatments, this group of patients often receives less than optimal treatment. Research into nurses' pain management highlights certain factors, such as lack of knowledge and attitudes and inadequate procedures for systematic pain assessment, as common barriers to effective pain management. However, educational interventions targeting nurses' pain management have shown promise. As cancer-related pain is also known to have a negative effect on vital aspects of the patient's life, as well as being commonly associated with problems such as sleep, fatigue, depression and anxiety, further development of knowledge within this area is warranted. Methods/design A quasi-experimental study design will be used to investigate whether the implementation of guidelines for systematic daily pain assessments following a theory-based educational intervention will result in an improvement in knowledge and attitude among nurses. A further aim is to investigate whether the intervention that targets nurses' behaviour will improve hospital patients' perception of pain. Data regarding nurses' knowledge and attitudes to pain (primary outcome, patient perception regarding pain (secondary outcome, together with socio-demographic variables, will be collected at baseline and at four weeks and 12 weeks following the intervention. Discussion Nursing care is nowadays acknowledged as an increasingly complicated activity and "nursing complexity is such that it can be seen as the quintessential complex intervention." To be able to change and improve clinical practice thus requires multiple points of attack appropriate to meet complex challenges. Consequently, we expect the theory-based intervention used in our quasi-experimental study to improve care as well as quality of life for this group of patients and we also envisage that

A theory-based educational intervention targeting nurses' attitudes and knowledge concerning cancer-related pain management: a study protocol of a quasi-experimental design.

Science.gov (United States)

Borglin, Gunilla; Gustafsson, Markus; Krona, Hans

2011-09-23

Pain is one of the most frequent problems among patients diagnosed with cancer. Despite the availability of effective pharmacological treatments, this group of patients often receives less than optimal treatment. Research into nurses' pain management highlights certain factors, such as lack of knowledge and attitudes and inadequate procedures for systematic pain assessment, as common barriers to effective pain management. However, educational interventions targeting nurses' pain management have shown promise. As cancer-related pain is also known to have a negative effect on vital aspects of the patient's life, as well as being commonly associated with problems such as sleep, fatigue, depression and anxiety, further development of knowledge within this area is warranted. A quasi-experimental study design will be used to investigate whether the implementation of guidelines for systematic daily pain assessments following a theory-based educational intervention will result in an improvement in knowledge and attitude among nurses. A further aim is to investigate whether the intervention that targets nurses' behaviour will improve hospital patients' perception of pain. Data regarding nurses' knowledge and attitudes to pain (primary outcome), patient perception regarding pain (secondary outcome), together with socio-demographic variables, will be collected at baseline and at four weeks and 12 weeks following the intervention. Nursing care is nowadays acknowledged as an increasingly complicated activity and "nursing complexity is such that it can be seen as the quintessential complex intervention." To be able to change and improve clinical practice thus requires multiple points of attack appropriate to meet complex challenges. Consequently, we expect the theory-based intervention used in our quasi-experimental study to improve care as well as quality of life for this group of patients and we also envisage that evidence-based guidelines targeting this patient group's pain

Theoretical study and experimental scheme for the generation of a 1064-nm continuous variable entangled light source with quasi-phase-matching PPKTP crystal

International Nuclear Information System (INIS)

Liu, W.Y.; Bi, S.W.

2011-01-01

Beginning from Maxwell's equations, various factors required for the non-degenerate optical parametric amplifier (NOPA) to operate are considered step by step. Analytic expressions are obtained, generated from the experimental parameters and through the numerical simulation of the quantum-correlated spectrum between the signal and the idler modes from the NOPA operating below threshold. On this basis, an experimental program is designed for the generation of a 1064-nm continuous variable entanglement light source with a quasi-phase-matching periodical polarized KTiOPO 4 (PPKTP) crystal through a below-threshold optical parametric down-conversion process. This will play a crucial role in subsequent experiments.

Employing Microsoft Live@edu Cloud Platform to Assist in Teaching Chinese Reading for Junior High School Students

Science.gov (United States)

Shih, Ru-Chu; Cho, Chia-Liang; Tsai, Chih-Cheng; Lou, Shi-Jer

2013-01-01

This study aimed to investigate junior high school students' learning attitudes and learning effectiveness through administering Microsoft Live@edu to assist in teaching Chinese reading. Quasi-experimental approach was used and a total of 63 eighth grade students were divided into the experimental group (N = 32) and control group (N = 31).…

The Quasi-Human Child: How Normative Conceptions of Childhood Enabled Neoliberal School Reform in the United States

Science.gov (United States)

Sonu, Debbie; Benson, Jeremy

2016-01-01

This paper argues that normative conceptions of the child, as a natural quasi-human being in need of guidance, enable current school reforms in the United States to directly link the child to neoliberal aims and objectives. In using Foucault's concept of governmentality and disciplinary power, we first present how the child is constructed as a…

Toward a Principled Sampling Theory for Quasi-Orders.

Science.gov (United States)

Ünlü, Ali; Schrepp, Martin

2016-01-01

Quasi-orders, that is, reflexive and transitive binary relations, have numerous applications. In educational theories, the dependencies of mastery among the problems of a test can be modeled by quasi-orders. Methods such as item tree or Boolean analysis that mine for quasi-orders in empirical data are sensitive to the underlying quasi-order structure. These data mining techniques have to be compared based on extensive simulation studies, with unbiased samples of randomly generated quasi-orders at their basis. In this paper, we develop techniques that can provide the required quasi-order samples. We introduce a discrete doubly inductive procedure for incrementally constructing the set of all quasi-orders on a finite item set. A randomization of this deterministic procedure allows us to generate representative samples of random quasi-orders. With an outer level inductive algorithm, we consider the uniform random extensions of the trace quasi-orders to higher dimension. This is combined with an inner level inductive algorithm to correct the extensions that violate the transitivity property. The inner level correction step entails sampling biases. We propose three algorithms for bias correction and investigate them in simulation. It is evident that, on even up to 50 items, the new algorithms create close to representative quasi-order samples within acceptable computing time. Hence, the principled approach is a significant improvement to existing methods that are used to draw quasi-orders uniformly at random but cannot cope with reasonably large item sets.

Toward a Principled Sampling Theory for Quasi-Orders

Science.gov (United States)

Ünlü, Ali; Schrepp, Martin

2016-01-01

Quasi-orders, that is, reflexive and transitive binary relations, have numerous applications. In educational theories, the dependencies of mastery among the problems of a test can be modeled by quasi-orders. Methods such as item tree or Boolean analysis that mine for quasi-orders in empirical data are sensitive to the underlying quasi-order structure. These data mining techniques have to be compared based on extensive simulation studies, with unbiased samples of randomly generated quasi-orders at their basis. In this paper, we develop techniques that can provide the required quasi-order samples. We introduce a discrete doubly inductive procedure for incrementally constructing the set of all quasi-orders on a finite item set. A randomization of this deterministic procedure allows us to generate representative samples of random quasi-orders. With an outer level inductive algorithm, we consider the uniform random extensions of the trace quasi-orders to higher dimension. This is combined with an inner level inductive algorithm to correct the extensions that violate the transitivity property. The inner level correction step entails sampling biases. We propose three algorithms for bias correction and investigate them in simulation. It is evident that, on even up to 50 items, the new algorithms create close to representative quasi-order samples within acceptable computing time. Hence, the principled approach is a significant improvement to existing methods that are used to draw quasi-orders uniformly at random but cannot cope with reasonably large item sets. PMID:27965601

Experimental evaluation of a quasi-modal parameter based rotor foundation identification technique

Science.gov (United States)

Yu, Minli; Liu, Jike; Feng, Ningsheng; Hahn, Eric J.

2017-12-01

Correct modelling of the foundation of rotating machinery is an invaluable asset in model-based rotor dynamic study. One attractive approach for such purpose is to identify the relevant modal parameters of an equivalent foundation using the motion measurements of rotor and foundation at the bearing supports. Previous research showed that, a complex quasi-modal parameter based system identification technique could be feasible for this purpose; however, the technique was only validated by identifying simple structures under harmonic excitation. In this paper, such identification technique is further extended and evaluated by identifying the foundation of a numerical rotor-bearing-foundation system and an experimental rotor rig respectively. In the identification of rotor foundation with multiple bearing supports, all application points of excitation forces transmitted through bearings need to be included; however the assumed vibration modes far outside the rotor operating speed cannot or not necessary to be identified. The extended identification technique allows one to identify correctly an equivalent foundation with fewer modes than the assumed number of degrees of freedom, essentially by generalising the technique to be able to handle rectangular complex modal matrices. The extended technique is robust in numerical and experimental validation and is therefore likely to be applicable in the field.

Evaluating the effectiveness of care integration strategies in different healthcare systems in Latin America: the EQUITY-LA II quasi-experimental study protocol.

Science.gov (United States)

Vázquez, María-Luisa; Vargas, Ingrid; Unger, Jean-Pierre; De Paepe, Pierre; Mogollón-Pérez, Amparo Susana; Samico, Isabella; Albuquerque, Paulette; Eguiguren, Pamela; Cisneros, Angelica Ivonne; Rovere, Mario; Bertolotto, Fernando

2015-07-31

Although fragmentation in the provision of healthcare is considered an important obstacle to effective care, there is scant evidence on best practices in care coordination in Latin America. The aim is to evaluate the effectiveness of a participatory shared care strategy in improving coordination across care levels and related care quality, in health services networks in six different healthcare systems of Latin America. A controlled before and after quasi-experimental study taking a participatory action research approach. In each country, two comparable healthcare networks were selected--intervention and control. The study contains four phases: (1) A baseline study to establish network performance in care coordination and continuity across care levels, using (A) qualitative methods: semi-structured interviews and focus groups with a criterion sample of health managers, professionals and users; and (B) quantitative methods: two questionnaire surveys with samples of 174 primary and secondary care physicians and 392 users with chronic conditions per network. Sample size was calculated to detect a proportion difference of 15% and 10%, before and after intervention (α=0.05; β=0.2 in a two-sided test); (2) a bottom-up participatory design and implementation of shared care strategies involving micro-level care coordination interventions to improve the adequacy of patient referral and information transfer. Strategies are selected through a participatory process by the local steering committee (local policymakers, health care network professionals, managers, users and researchers), supported by appropriate training; (3) Evaluation of the effectiveness of interventions by measuring changes in levels of care coordination and continuity 18 months after implementation, applying the same design as in the baseline study; (4) Cross-country comparative analysis. This study complies with international and national legal stipulations on ethics. Conditions of the study procedure

Student School-Level Math Knowledge Influence on Applied Mathematics Study Courses

Directory of Open Access Journals (Sweden)

Rima Kriauzienė

2013-08-01

Full Text Available Purpose—to find out the influence of student school-level math knowledge on courses of applied mathematics studies: what is the importance of having a math maturity exam for students, an estimate of social science students’ motivation to learn math, and attendance of seminars. Students who did take the state exam attended more seminars than the students who did not take math exam, and vice versa. Design/methodology/approach—this work describes research which involved persistent MRU Public Administration degree program second-year students. Doing statistical analysis of the data will be a link between school-level mathematics knowledge and attendance activity in seminars and motivation to learn mathematics. Findings—the research is expected to establish a connection between school-level mathematics knowledge and student motivation to learn mathematics. It was found that there is no correlation between student opinions about school mathematics courses and result of their first test. Determine relationship between attendance of exercises and public examinations. Between the stored type of exam and test results are dependent. Determine relationship between exercise attendance and test results, as shown by the calculated correlation coefficient Based on the results, it’s recommended to increase the number of exercises. A more refined analysis of the data is subject to further investigation. Research limitations/implications—this method is just one of the possible ways of application. Practical implications—that kind of research and its methodology can be applied not only to the subject of applied mathematics studies, but also to other natural or social sciences. Originality/Value—empirical experiment data can be used in other studies of Educology nature analysis.

Student School-Level Math Knowledge Influence on Applied Mathematics Study Courses

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Tadas Laukevičius

2011-12-01

Full Text Available Purpose—to find out the influence of student school-level math knowledge on courses of applied mathematics studies: what is the importance of having a math maturity exam for students, an estimate of social science students’ motivation to learn math, and attendance of seminars. Students who did take the state exam attended more seminars than the students who did not take math exam, and vice versa.Design/methodology/approach—this work describes research which involved persistent MRU Public Administration degree program second-year students. Doing statistical analysis of the data will be a link between school-level mathematics knowledge and attendance activity in seminars and motivation to learn mathematics.Findings—the research is expected to establish a connection between school-level mathematics knowledge and student motivation to learn mathematics.It was found that there is no correlation between student opinions about school mathematics courses and result of their first test.Determine relationship between attendance of exercises and public examinations.Between the stored type of exam and test results are dependent.Determine relationship between exercise attendance and test results, as shown by the calculated correlation coefficientBased on the results, it’s recommended to increase the number of exercises. A more refined analysis of the data is subject to further investigation.Research limitations/implications—this method is just one of the possible ways of application.Practical implications—that kind of research and its methodology can be applied not only to the subject of applied mathematics studies, but also to other natural or social sciences.Originality/Value—empirical experiment data can be used in other studies of Educology nature analysis.

Perceptual Modification of the Built Environment to Influence Behavior Associated with Physical Activity: Quasi-Experimental Field Studies of a Stair Banister Illusion.

Science.gov (United States)

Masters, Rich; Capio, Catherine; Poolton, Jamie; Uiga, Liis

2018-06-01

Re-engineering the built environment to influence behaviors associated with physical activity potentially provides an opportunity to promote healthier lifestyles at a population level. Here we present evidence from two quasi-experimental field studies in which we tested a novel, yet deceptively simple, intervention designed to alter perception of, and walking behavior associated with, stairs in an urban area. Our objectives were to examine whether adjusting a stair banister has an influence on perceptions of stair steepness or on walking behavior when approaching the stairs. In study 1, we asked participants (n = 143) to visually estimate the steepness of a set of stairs viewed from the top, when the stair banister was adjusted so that it converged with or diverged from the stairs (± 1.91°) or remained neutral (± 0°). In study 2, the walking behavior of participants (n = 36) was filmed as they approached the stairs to descend, unaware of whether the banister converged, diverged, or was neutral. In study 1, participants estimated the stairs to be steeper if the banister diverged from, rather than converged with, the stairs. The effect was greater when participants were unaware of the adjustment. In study 2, walking speed was significantly slower when the banister diverged from, rather than converged with, the stairs. These findings encourage us to speculate about the potential to economically re-engineer features of the built environment to provide opportunities for action (affordances) that invite physical activity behavior or even promote safer navigation of the environment.

Post partum anxiety and depression in peri-urban communities of Karachi, Pakistan: a quasi-experimental study

Directory of Open Access Journals (Sweden)

Azam Iqbal S

2009-10-01

Full Text Available Abstract Background Postpartum anxiety and depression is a major public health concern because of its adverse effects on the cognitive and social development of the infant. Globally postpartum depression has been widely investigated but as anxiety is a more prominent feature of postpartum depression we assessed the prevalence of anxiety and depression and their associated factors in post partum women. Methods A quasi-experimental study investigating the impact of postpartum anxiety and depression on child growth and development was conducted in two peri-urban, multiethnic, communities of Karachi, a mega city of Pakistan. A house to house questionnaire based survey was done by trained field workers; 420 consenting pregnant women were identified and data for socio-demographic, home environment and family relationship variables was collected between 36 weeks of pregnancy and within 10 days of childbirth. Mother's levels of anxiety and depression were assessed after one month, two months, six months and twelve months of childbirth; this was two step process: initially an indigenous, validated screening instrument Aga Khan University Anxiety and Depression Scale was used and diagnostic confirmation was done through a psychologist's interview based on DSM IV criteria. Women found to be anxious and depressed at least once out of four assessments were considered for the computation of overall prevalence of postpartum anxiety and depression as well as its risk factors. However, point prevalence's of postpartum anxiety and depression were also reported at each assessment time. Two sixty seven women could be followed for one year. Data was analyzed using SPSS. Chi-square test, simple and multiple logistic regression were used to see the association of different factors. Results The overall prevalence of postpartum anxiety and depression was found to be 28.8 percent. Domestic violence, difficulty in breast feeding at birth and unplanned current pregnancy

Quasi-elastic scattering

International Nuclear Information System (INIS)

Pizzi, J.R.

1975-01-01

In a first part, the kinematical conditions which are chosen to study quasi free scattering reactions are presented, as well as the impulse approximation which is used to interpret the experimental data. Then, the evolution of the study of these reactions in the last few years is analyzed. Three recent experiments are presented and discussed. Two of them deal with α-clusters studied by (p,pα) reaction at 157 and 600MeV. The third is concerned with d, t and 3 He clusters studied by (p,px) reaction at 75MeV [fr

How supportive supervision influences immunization session site practices: a quasi-experimental study in Odisha, India

Directory of Open Access Journals (Sweden)

Bhuputra Panda

2015-01-01

Full Text Available Background: Routine immunization (RI is a key child survival intervention. Ensuring acceptable standards of RI service delivery is critical for optimal outcomes. Accumulated evidences suggest that ‘supportive supervision’ improves the quality of health care services in general. During 2009–2010, the Government of Odisha and UNICEF jointly piloted this strategy in four districts to improve RI program outcomes. The present study aims to assess the effect of this strategy on improvement of skills and practices at immunization session sites. Design: A quasi-experimental ‘post-test only’ study design was adopted to compare the opinion and practices of frontline health workers and their supervisors in four intervention districts (IDs with two control districts (CDs. Altogether, we interviewed 111 supervisor–supervisee (health worker pairs using semi-structured interview schedules and case vignettes. We also directly observed health workers’ practices during immunization sessions at 111 sites. Data were analyzed with SPSS version 16.0. Results: The mean knowledge score of supervisors in CDs was significantly higher than in intervention groups. Variegated responses were obtained on case vignettes. The control group performed better in solving certain hypothetically asked problems, whereas the intervention group scored better in others. Health workers in IDs gave a lower rating to their respective supervisors’ knowledge, skill, and frequency of supervision. Logistics and vaccine availability were better in CDs. Conclusion: Notwithstanding other limitations, supportive supervision may not have independent effects on improving the quality of immunization services. Addressing systemic issues, such as the availability of essential logistics, supply chain management, timely indenting, and financial resources, could complement the supportive supervision strategy in improving immunization service delivery.

Quasi-experimental study designs series-paper 5: a checklist for classifying studies evaluating the effects on health interventions-a taxonomy without labels.

Science.gov (United States)

Reeves, Barnaby C; Wells, George A; Waddington, Hugh

2017-09-01

The aim of the study was to extend a previously published checklist of study design features to include study designs often used by health systems researchers and economists. Our intention is to help review authors in any field to set eligibility criteria for studies to include in a systematic review that relate directly to the intrinsic strength of the studies in inferring causality. We also seek to clarify key equivalences and differences in terminology used by different research communities. Expert consensus meeting. The checklist comprises seven questions, each with a list of response items, addressing: clustering of an intervention as an aspect of allocation or due to the intrinsic nature of the delivery of the intervention; for whom, and when, outcome data are available; how the intervention effect was estimated; the principle underlying control for confounding; how groups were formed; the features of a study carried out after it was designed; and the variables measured before intervention. The checklist clarifies the basis of credible quasi-experimental studies, reconciling different terminology used in different fields of investigation and facilitating communications across research communities. By applying the checklist, review authors' attention is also directed to the assumptions underpinning the methods for inferring causality. Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.

Effects of palliative care training program on knowledge, attitudes, beliefs and experiences among student physiotherapists: A preliminary quasi-experimental study

Directory of Open Access Journals (Sweden)

Senthil P Kumar

2011-01-01

Full Text Available Background: Physiotherapists play an inherent role in the multidisciplinary palliative care team. Existing knowledge, attitudes, beliefs and experiences influence their team participation in palliative care. Aims: The objective of this study was to assess the changes in knowledge, attitudes, beliefs and experiences among student physiotherapists who attended a palliative care training program. Settings and Design: Preliminary quasi-experimental study design, conducted at an academic institution. Materials and Methods: Fifty-two student physiotherapists of either gender (12 male, 40 female of age (20.51±1.78 years who attended a palliative care training program which comprised lectures and case examples of six-hours duration participated in this study. The study was performed after getting institutional approval and obtaining participants′ written informed consent. The lecture content comprised WHO definition of palliative care, spiritual aspects of life, death and healing, principles, levels and models of palliative care, and role of physiotherapists in a palliative care team. The physical therapy in palliative care-knowledge, attitudes, beliefs and experiences scale (PTiPC-KABE Scale- modified from palliative care attitudes scale were used for assessing the participants before and after the program. Statistical Analysis: Paired t-test and Wilcoxon signed rank test at 95% confidence interval using SPSS 11.5 for Windows. Results: Statistically significant differences (P<0.05 were noted for all four subscales- knowledge (7.84±4.61 points, attitudes (9.46±8.06 points, beliefs (4.88±3.29 points and experiences (15.8±11.28 points out of a total score of 104 points. Conclusions: The focus-group training program produced a significant positive change about palliative care in knowledge, attitudes, beliefs and experiences among student physiotherapists.

Is There a Purchase Limit on Regional Growth? A Quasi-experimental Evaluation of Investment Grants Using Matching Techniques

DEFF Research Database (Denmark)

Mitze, Timo Friedel; Paloyo, Alfredo R.; Alecke, Björn

2015-01-01

In this article, we apply recent advances in quasi-experimental estimation methods to analyze the effectiveness of Germany’s large-scale regional policy instrument, the joint Federal Government/State Programme “Gemeinschaftsaufgabe Verbesserung der regionalen Wirtschaftsstruktur” (GRW), which is ...... of matching techniques in regional data settings. Overall, however, the matching approach can still be considered of great value for regional policy analysis and should be the subject of future research efforts in the field of empirical regional science.......In this article, we apply recent advances in quasi-experimental estimation methods to analyze the effectiveness of Germany’s large-scale regional policy instrument, the joint Federal Government/State Programme “Gemeinschaftsaufgabe Verbesserung der regionalen Wirtschaftsstruktur” (GRW), which...... is a means to foster labor-productivity growth in lagging regions. In particular, adopting binary and generalized propensity-score matching methods, our results indicate that the GRW can be generally considered effective. However, we find evidence for a nonlinear relationship between GRW funding and regional...

Comparing student clinical self-efficacy and team process outcomes for a DEU, blended, and traditional clinical setting: A quasi-experimental research study.

Science.gov (United States)

Plemmons, Christina; Clark, Michele; Feng, Du

2018-03-01

Clinical education is vital to both the development of clinical self-efficacy and the integration of future nurses into health care teams. The dedicated education unit clinical teaching model is an innovative clinical partnership, which promotes skill development, professional growth, clinical self-efficacy, and integration as a team member. Blended clinical teaching models are combining features of the dedicated education unit and traditional clinical model. The aims of this study are to explore how each of three clinical teaching models (dedicated education unit, blended, traditional) affects clinical self-efficacy and attitude toward team process, and to compare the dedicated education unit model and blended model to traditional clinical. A nonequivalent control-group quasi-experimental design was utilized. The convenience sample of 272 entry-level baccalaureate nursing students included 84 students participating in a dedicated education unit model treatment group, 66 students participating in a blended model treatment group, and 122 students participating in a traditional model control group. Perceived clinical self-efficacy was evaluated by the pretest/posttest scores obtained on the General Self-Efficacy scale. Attitude toward team process was evaluated by the pretest/posttest scores obtained on the TeamSTEPPS® Teamwork Attitude Questionnaire. All three clinical teaching models resulted in significant increases in both clinical self-efficacy (p=0.04) and attitude toward team process (p=0.003). Students participating in the dedicated education unit model (p=0.016) and students participating in the blended model (pteam process among entry-level baccalaureate nursing students. Copyright © 2017 Elsevier Ltd. All rights reserved.

Effectiveness of a school-based multicomponent intervention on children nutritional status among primary school children in bangkok, thailand

International Nuclear Information System (INIS)

Chawla, N.; Panza, A.; Kumar, R.

2017-01-01

Childhood obesity has become a major public health issue today. The prevalence of obesity and overweight is increasing in both adult and children. Childhood obesity in Thailand has more than doubled since the 1960s and a recent study reported that overweight and obesity in Thai is the 5th highest in Asia. The present study objective is to evaluate the effectiveness of a life skills multicomponent school-based intervention on children's nutritional status. Methods: A quasi-experimental design was conducted in two-groups (control and intervention schools) on 453 students attending grade levels 4-5 in Bangkok. Two schools were selected for control, and two schools for intervention groups. The intervention included education, dietary, physical activity, food-environment, school built-environment, and life skills components. Outcomes were measured at baseline and post-treatment measured after 6 months. Results: The intervention group had significant improvements in healthier practice (+1.5 mean difference, p=0.048) on dietary habits and physical activity, lowered cholesterol levels (-2.43 mean, p=0.019), and higher HDL levels (+4.06 p=0.028) as compared to control. A higher reduction of overweight individuals among the intervention group over the intervention period was observed. Physical activity and consumption of vegetable increased while consumption of high-caloric snacks and fasts food decreased in children after the intervention. Conclusion: Childhood overweight and obesity is a serious public health problem based on its increasing rates and the associated health risks. This study indicated that multidisciplinary approach on school-based interventions is likely most effective to prevent children becoming overweight in long term. More research should be conducted on school-based intervention with longer intervention periods with higher sustainability. (author)

Newspapers in Science Education: A Study Involving Sixth Grade Students

Science.gov (United States)

Lai, Ching-San; Wang, Yun-Fei

2016-01-01

The purpose of this study was to explore the learning performance of sixth grade elementary school students using newspapers in science teaching. A quasi-experimental design with a single group was used in this study. Thirty-three sixth grade elementary school students participated in this study. The research instruments consisted of three…

An individualized exercise programme with and without behavioural change enhancement strategies for managing fatigue among frail older people: a quasi-experimental pilot study.

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Liu, Justina Y-W; Lai, Claudia Ky; Siu, Parco M; Kwong, Enid; Tse, Mimi My

2017-04-01

To evaluate the feasibility and preliminary effects of an individualized exercise programme with and without behavioural change enhancement strategies for frail older people with fatigue. A three-arm, single-blinded, quasi-experimental pilot study. Community health centres. A total of 79 frail older people with fatigue, mean age 79.32 years (±7.72). The combined group received a 16-week combined intervention consisting of exercise training and a behavioural change enhancement programme. The exercise group received exercise training and health talks, whereas the control group received only health talks. Feasibility was assessed through the participants' recruitment, retention, attendance and adherence, feedback, and reports of adverse events. The preliminary effects were assessed by the participants' level of fatigue, physical endurance, self-efficacy, and self-perceived compliance with exercise. Feasibility was achievable with high recruitment (87.2%) and low overall attrition (7.1%) rates. A similar reduction in fatigue was identified in all groups, but a trend of greater improvement in physical endurance was observed in the combined group than in the other two groups. The combined group also had a significantly better attendance rate [F(2,76) = 5.64, p behavioural change, when the participants are establishing the habit of exercising daily.

Student Preferences and Performance in Online and Face-to-Face Classes Using Myers-Briggs Indicator: A Longitudinal Quasi-Experimental Study

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Seta Boghikian-Whitby

2016-05-01

Full Text Available This longitudinal, quasi-experimental study investigated students’ cognitive personality type using the Myers-Briggs personality Type Indicator (MBTI in Internet-based Online and Face-to-Face (F2F modalities. A total of 1154 students enrolled in 28 Online and 32 F2F sections taught concurrently over a period of fourteen years. The study measured whether the sample is similar to the national average percentage frequency of all 16 different personality types; whether specific personality type students preferred a specific modality of instructions and if this preference changed over time; whether learning occurred in both class modalities; and whether specific personality type students learned more from a specific modality. Data was analyzed using regression, t-test, frequency, and Chi-Squared. The study concluded that data used in the study was similar to the national statistics; that no major differences in preference occurred over time; and that learning did occur in all modalities, with more statistically significant learning found in the Online modality versus F2F for Sensing, Thinking, and Perceiving types. Finally, Sensing and Thinking (ST and Sensing and Perceiving (SP group types learned significantly more in Online modality versus F2F.

Perceptions and attitudes of formative assessments in middle-school science classes

Science.gov (United States)

Chauncey, Penny Denyse

No Child Left Behind mandates utilizing summative assessment to measure schools' effectiveness. The problem is that summative assessment measures students' knowledge without depth of understanding. The goal of public education, however, is to prepare students to think critically at higher levels. The purpose of this study was to examine any difference between formative assessment incorporated in instruction as opposed to the usual, more summative methods in terms of attitudes and academic achievement of middle-school science students. Maslow's theory emphasizes that individuals must have basic needs met before they can advance to higher levels. Formative assessment enables students to master one level at a time. The research questions focused on whether statistically significant differences existed between classrooms using these two types of assessments on academic tests and an attitude survey. Using a quantitative quasi-experimental control-group design, data were obtained from a sample of 430 middle-school science students in 6 classes. One control and 2 experimental classes were assigned to each teacher. Results of the independent t tests revealed academic achievement was significantly greater for groups that utilized formative assessment. No significant difference in attitudes was noted. Recommendations include incorporating formative assessment results with the summative results. Findings from this study could contribute to positive social change by prompting educational stakeholders to examine local and state policies on curriculum as well as funding based on summative scores alone. Use of formative assessment can lead to improved academic success.

Prayer Lessons to Promote Happiness among Kindergarten School Children: A Cross-Country Experimental Study

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Pandya, Samta P.

2018-01-01

Based on a one-year longitudinal experimental study with 3,782 kindergarten school children across 15 countries, this article examines the association between prayer and happiness. Results show that the post-test scores on the faces scale were higher for the participant group who had taken the prayer lessons vis-à-vis the comparison group.…

Effects of a School-Based Sexuality Education Program on Peer Educators: The Teen PEP Model

Science.gov (United States)

Jennings, J. M.; Howard, S.; Perotte, C. L.

2014-01-01

This study evaluated the impact of the Teen Prevention Education Program (Teen PEP), a peer-led sexuality education program designed to prevent unintended pregnancy and sexually transmitted infections (STIs) including HIV among high school students. The study design was a quasi-experimental, nonrandomized design conducted from May 2007 to May…

The effects of a walking program on older Chinese American immigrants with hypertension: a pretest and posttest quasi-experimental design.

Science.gov (United States)

Chiang, Chun-Ying; Sun, Fan-Ko

2009-01-01

Hypertension is known to have high rates among Chinese Americans. Identifying culturally specific interventions to reduce sedentary behavior may be effective in reducing hypertension. This study examines the effects of an 8-week walking program with and without cultural modification. The study used a 2-group, pretest and posttest, quasi-experimental design. A total sample of 128 Chinese American immigrants with hypertension were assigned to walking groups. The results showed that the walking program had no significant effects upon participant blood pressure or walking endurance. The results also revealed that individuals in the maintenance stage walked longer than those in the preparation stage. A comparison of demographic data showed that subjects with a lower level of education walked more minutes per week, which contributed to lower systolic blood pressures among this group as compared with those with a higher level of education. These results suggest that this walking protocol, when translated into Chinese and when accompanied by a weekly telephone reminder and other interactions with a Chinese-speaking nurse, is appropriate to use without additional cultural modification. Future research should examine other components of Chinese culture or should apply this protocol for a longer period of time.

An Examination of the Extent to Which School Outdoor Activities Could Enhance Senior Secondary Two Students' Achievement in Ecology

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Achor, Emmanuel E.; Amadu, Samuel O.

2015-01-01

This study examined the extent to which school outdoor activities could enhance senior secondary (SS) two students' achievement in ecology. Non randomized pre test post test control group Quasi-experimental design was adopted. A sample of 160 SS II students from 4 co-educational schools in Jalingo metropolis, Taraba State Nigeria was used. A 40…

Selecting and Improving Quasi-Experimental Designs in Effectiveness and Implementation Research.

Science.gov (United States)

Handley, Margaret A; Lyles, Courtney R; McCulloch, Charles; Cattamanchi, Adithya

2018-04-01

Interventional researchers face many design challenges when assessing intervention implementation in real-world settings. Intervention implementation requires holding fast on internal validity needs while incorporating external validity considerations (such as uptake by diverse subpopulations, acceptability, cost, and sustainability). Quasi-experimental designs (QEDs) are increasingly employed to achieve a balance between internal and external validity. Although these designs are often referred to and summarized in terms of logistical benefits, there is still uncertainty about (a) selecting from among various QEDs and (b) developing strategies to strengthen the internal and external validity of QEDs. We focus here on commonly used QEDs (prepost designs with nonequivalent control groups, interrupted time series, and stepped-wedge designs) and discuss several variants that maximize internal and external validity at the design, execution and implementation, and analysis stages.

Sharing Physician Notes Through an Electronic Portal is Associated With Improved Medication Adherence: Quasi-Experimental Study

OpenAIRE

Wright, Eric; Darer, Jonathan; Tang, Xiaoqin; Thompson, Jason; Tusing, Lorraine; Fossa, Alan; Delbanco, Tom; Ngo, Long; Walker, Jan

2015-01-01

Background In surveys, interviews, and focus groups, patients taking medications and offered Web portal access to their primary care physicians? (PCPs) notes report improved adherence to their regimens. However, objective confirmation has yet to be reported. Objective To evaluate the association between patient Internet portal access to primary care physician visit notes and medication adherence. Methods This study is a retrospective comparative analysis at one site of the OpenNotes quasi-exp...

The Impact of Authentic Materials and Tasks on Students’ Communicative Competence at a Colombian Language School

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César Augusto Castillo Losada

2017-01-01

Full Text Available This article reports on a study carried out in a foreign language school at a Colombian public university. Its main purpose was to analyze the extent to which the use of authentic materials and tasks contributes to the enhancement of the communicative competence on an A2 level English course. A mixed study composed of a quasi-experimental and a descriptive-qualitative research design was implemented by means of a pre-test, a post-test, observations, semi-structured interviews, surveys, and diaries. The findings showed that the use of authentic materials and tasks, within the framework of a pedagogical project, had an impact on students’ communicative competence progress and on the teaching practices of the experimental group teacher.

A Multicomponent Schoolyard Intervention Targeting Children’s Recess Physical Activity and Sedentary Behavior: Effects After One Year

DEFF Research Database (Denmark)

Van Kann, Dave H.H.; de Vries, S.I.; Schipperijn, J.

2017-01-01

Background Aim of the study was to test the 12-month effects of a multicomponent physical activity (PA) intervention at schoolyards on recess PA levels of 6th and 7th grade children in primary schools, combining Global Positioning System (GPS) and accelerometry data. Methods A quasi-experimental ......Background Aim of the study was to test the 12-month effects of a multicomponent physical activity (PA) intervention at schoolyards on recess PA levels of 6th and 7th grade children in primary schools, combining Global Positioning System (GPS) and accelerometry data. Methods A quasi...

Effects on alcohol use of a Swedish school-based prevention program for early adolescents: a longitudinal study

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Linda Beckman

2017-01-01

Full Text Available Abstract Background The aim of the study was to address the lack of evaluations of school-based substance use prevention programs and to conduct a quasi-experimental evaluation of the alcohol use part of the Triad intervention. Methods Eleven Swedish intervention schools (285 pupils and three control schools (159 pupils participated in the evaluation. Baseline measurements were conducted in 2011 before the alcohol part in the prevention program was implemented in the intervention schools (school year 6, ages 12–13. We estimated an Intention-To-Treat (ITT Difference-in-Difference (DD model to analyze the effectiveness of the intervention on subsequent alcohol use measured in grades 7, 8 and 9. Results The main results show no effect on the likelihood of drinking alcohol or drinking to intoxication. Conclusions The lack of positive effects highlights the need for policy-makers and public health officials need to carefully consider and evaluate prevention programs in order to ensure that they are worthwhile from school, health, and societal perspectives.

Experimental and Modelling Investigations of the Coupled Elastoplastic Damage of a Quasi-brittle Rock

Science.gov (United States)

Zhang, Jiu-Chang

2018-02-01

Triaxial compression tests are conducted on a quasi-brittle rock, limestone. The analyses show that elastoplastic deformation is coupled with damage. Based on the experimental investigation, a coupled elastoplastic damage model is developed within the framework of irreversible thermodynamics. The coupling effects between the plastic and damage dissipations are described by introducing an isotropic damage variable into the elastic stiffness and yield criterion. The novelty of the model is in the description of the thermodynamic force associated with damage, which is formulated as a state function of both elastic and plastic strain energies. The latter gives a full consideration on the comprehensive effects of plastic strain and stress changing processes in rock material on the development of damage. The damage criterion and potential are constructed to determine the onset and evolution of damage variable. The return mapping algorithms of the coupled model are deduced for three different inelastic corrections. Comparisons between test data and numerical simulations show that the coupled elastoplastic damage model is capable of describing the main mechanical behaviours of the quasi-brittle rock.

Critical phenomena in quasi-two-dimensional vibrated granular systems.

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Guzmán, Marcelo; Soto, Rodrigo

2018-01-01

The critical phenomena associated to the liquid-to-solid transition of quasi-two-dimensional vibrated granular systems is studied using molecular dynamics simulations of the inelastic hard sphere model. The critical properties are associated to the fourfold bond-orientational order parameter χ_{4}, which measures the level of square crystallization of the system. Previous experimental results have shown that the transition of χ_{4}, when varying the vibration amplitude, can be either discontinuous or continuous, for two different values of the height of the box. Exploring the amplitude-height phase space, a transition line is found, which can be either discontinuous or continuous, merging at a tricritical point and the continuous branch ends in an upper critical point. In the continuous transition branch, the critical properties are studied. The exponent associated to the amplitude of the order parameter is β=1/2, for various system sizes, in complete agreement with the experimental results. However, the fluctuations of χ_{4} do not show any critical behavior, probably due to crossover effects by the close presence of the tricritical point. Finally, in quasi-one-dimensional systems, the transition is only discontinuous, limited by one critical point, indicating that two is the lower dimension for having a tricritical point.

Are children participating in a quasi-experimental education outside the classroom intervention more physically active?

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Mikkel Bo Schneller

2017-05-01

Full Text Available Abstract Background Education outside the classroom (EOtC is a curriculum-based approach to teaching that has shown positive associations with children’s physical activity and academic learning in small-scale case studies. The purpose of this large-scale quasi-experimental study was to determine if children who participate regularly in EOtC spend more time being physically active than children who do not. Methods In the 2014/2015 study TEACHOUT, classes were recruited in pairs such that each EOtC class had a non-EOtC comparison class at the same school and grade level. Participants in 17 EOtC classes and 16 comparison parallel classes across Denmark wore an Axivity AX3 accelerometer taped to the lower back for seven consecutive days. Data from 201 EOtC participants (63.3% girls, age 10.82 ± 1.05, and 160 comparison participants (59.3% girls, age 10.95 ± 1.01 were analysed using an ‘intention to treat’ (ITT approach. The amount of EOtC the participants were exposed to was monitored. Associations between time spent in different physical activity intensities and EOtC group and sex were assessed using generalised linear models adjusted for age. In a second analysis, we modified the sample using a ‘per protocol’ (PP approach, only including EOtC and comparison class pairs where the EOtC class had >150 min and the comparison had <150 min of EOtC during the measured week. Results On average, EOtC participants spent 8.4 (ITT and 9.2 (PP minutes more in moderate-to-vigorous physical activity (MVPA per day than comparison participants (p < 0.05. However, EOtC boys spent 18.7 (ITT and 20.8 (PP minutes more in MVPA per day than comparison boys (p < 0.01, while there were no significant between-group differences for girls. Conclusions For boys, EOtC was associated with more daily time being spent moderately and vigorously physically active. No differences were observed for girls. Implementing EOtC into schools’ weekly practice can be

The Effects of Mind Subtraction Meditation on Depression, Social Anxiety, Aggression, and Salivary Cortisol Levels of Elementary School Children in South Korea.

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Yoo, Yang-Gyeong; Lee, Duck-Joo; Lee, In-Soo; Shin, Namin; Park, Ju-Yeon; Yoon, Mi-Ra; Yu, Boas

2016-01-01

This study analyzed the effects of a school-based mind subtraction meditation program on depression, social anxiety, aggression, and salivary cortisol levels of 42 elementary school children in South Korea. The research design was a nonequivalent group comparison with pretest and post-test. The experimental group was given 8weeks of the meditation program. The results showed social anxiety, aggression, and salivary cortisol levels were significantly lowered in the experimental group. This demonstrated that the school-based mind subtraction meditation program could be effective in improving psychosocial and behavioral aspects of mental health in elementary school children. Copyright © 2016 Elsevier Inc. All rights reserved.

Proton propagation through nuclei and the quasi-free reaction mechanism studied with (e,e'p) reactions

International Nuclear Information System (INIS)

Dutta, D.; Abbott, D.; Amatuni, T.A.

1997-01-01

Jefferson Lab experiment E91-013 measured the energy dependence of proton propagation in nuclei, using the quasi-free (e, e'p) reaction. The ratios of the experimental (e, e'p) cross-sections integrated over the quasi-free region to PWIA calculations are presented as a function of momentum transfer, (0.6 2 2 ) and target nucleus (C, Fe and Au). As a first step towards a longitudinal and transverse separation of the quasi-free cross-section, a super ratio of the measured to the calculated cross-sections at forward and backward angles is presented

Critical Need for Family-Based, Quasi-Experimental Designs in Integrating Genetic and Social Science Research

Science.gov (United States)

Lahey, Benjamin B.; Turkheimer, Eric; Lichtenstein, Paul

2013-01-01

Researchers have identified environmental risks that predict subsequent psychological and medical problems. Based on these correlational findings, researchers have developed and tested complex developmental models and have examined biological moderating factors (e.g., gene–environment interactions). In this context, we stress the critical need for researchers to use family-based, quasi-experimental designs when trying to integrate genetic and social science research involving environmental variables because these designs rigorously examine causal inferences by testing competing hypotheses. We argue that sibling comparison, offspring of twins or siblings, in vitro fertilization designs, and other genetically informed approaches play a unique role in bridging gaps between basic biological and social science research. We use studies on maternal smoking during pregnancy to exemplify these principles. PMID:23927516

The role of family and school-level factors in bullying and cyberbullying: a cross-sectional study.

Science.gov (United States)

Bevilacqua, Leonardo; Shackleton, Nichola; Hale, Daniel; Allen, Elizabeth; Bond, Lyndal; Christie, Deborah; Elbourne, Diana; Fitzgerald-Yau, Natasha; Fletcher, Adam; Jones, Rebecca; Miners, Alec; Scott, Stephen; Wiggins, Meg; Bonell, Chris; Viner, Russell M

2017-07-11

Bullying and cyberbullying are common phenomena in schools. These negative behaviours can have a significant impact on the health and particularly mental health of those involved in such behaviours, both as victims and as bullies. This UK study aims to investigate student-level and school-level characteristics of those who become involved in bullying and cyberbullying behaviours as victims or perpetrators. We used data from 6667 Year 7 students from the baseline survey of a cluster randomized trial in 40 English schools to investigate the associations between individual-level and school-level variables with bullying victimization, cyberbullying perpetration, and cyberbullying victimization. We ran multilevel models to examine associations of bullying outcomes with individual-level variables and school-level variables. In multilevel models, at the school level, school type and school quality measures were associated with bullying risk: students in voluntary-aided schools were less likely to report bullying victimization (0.6 (0.4, 0.9) p = 0.008), and those in community (3.9 (1.5, 10.5) p = 0.007) and foundation (4.0 (1.6, 9.9) p = 0.003) schools were more likely to report being perpetrators of cyberbullying than students in mainstream academies. A school quality rating of "Good" was associated with greater reported bullying victimization (1.3 (1.02, 1.5) p = 0.03) compared to ratings of "Outstanding." Bullying victimization and cyberbullying prevalence vary across school type and school quality, supporting the hypothesis that organisational/management factors within the school may have an impact on students' behaviour. These findings will inform future longitudinal research investigating which school factors and processes promote or prevent bullying and cyberbullying behaviours. Trial ID: ISRCTN10751359 Registered: 11/03/2014 (retrospectively registered).

[Nurses' Attitudes toward the “Advanced Nursing Process” before and after an educational intervention – a quasi-experimental study].

Science.gov (United States)

Leoni-Scheiber, Claudia; Gothe, Raffaella Matteucci; Müller-Staub, Maria

2016-02-01

The attitude of nurses influences their application of the Advanced Nursing Process. Studies reveal deficits in the application of the Advanced Nursing Process that is based on valid assessments and nursing classifications. These deficits affect decision-making and – as a result – nursing care quality. In German speaking countries nurses' attitudes towards nursing diagnoses as part of the Advanced Nursing Process were not yet measured. The aim of this study was to evaluate the effects of an educational intervention on nurses' attitude. A quasi-experimental intervention study was carried out in Austria and Germany. Before and after a standardised educational intervention 51 nurses estimated their attitude with the instrument Positions on Nursing Diagnosis (PND). Analyses were performed by Wilcoxon- and U-tests. Before the educational intervention the average attitude score of the Austrian nurses was more positive than in the German group. After the study intervention both groups regarded nursing diagnostics statistically significant more convincing and better understandable. However, both groups still described the application of the Advanced Nursing Process as difficult and demanding to perform. In the future, more attention should be given to the reflexion and development of nurses' attitude towards the Advanced Nursing Process because attitudes lead nurses' actions. In further studies influencing organizational and structural factors in diverse settings will be analysed.

Investigating the Relationship between School Level and a School Growth Mindset

Science.gov (United States)

Hanson, Janet; Ruff, William; Bangert, Arthur

2016-01-01

This study explored the relationship between school level and the psychosocial construct of a growth mindset school culture. Data was collected on the What's My School Mindset (WMSM) Survey from a stratified random sample of PK-12 faculty and administrators (n = 347) in 30 schools across a large northwestern state. The overarching research…

Relative Effect of Lecture Method Supplemented with Music and Computer Animation on Senior Secondary School Students' Retention in Electrochemistry

Science.gov (United States)

Akpoghol, T. V.; Ezeudu, F. O.; Adzape, J. N.; Otor, E. E.

2016-01-01

The study investigated the effects of Lecture Method Supplemented with Music (LMM) and Computer Animation (LMC) on senior secondary school students' retention in electrochemistry in Makurdi metropolis. Three research questions and three hypotheses guided the study. The design of the study was quasi experimental, specifically the pre-test,…

Schools as Incubators of Democratic Participation: Building Long-Term Political Efficacy with Civic Education

Science.gov (United States)

Pasek, Josh; Feldman, Lauren; Romer, Daniel; Jamieson, Kathleen Hall

2008-01-01

Despite a growing consensus that civic education is an important aspect of political socialization, little research has prospectively examined how gains made during civics courses are maintained after high school. This study used a quasi-experimental design to examine longer-term effects of the Student Voices program, which was originally…

Study of atomic jumps in quasi-crystals; Etude des sauts atomiques dans les quasi-cristaux

Energy Technology Data Exchange (ETDEWEB)

Lyonnard, S

1997-05-07

The terminology phason used in quasicrystals to refer to atomic jumps. The study of the hopping process is important for the understanding of many basic issues in quasi-crystallography: structure, stability, diffusion, phase transitions between quasicrystals and approximants, mechanical properties. Quasi-elastic neutron scattering allows to find the characteristics of each elementary jump: chemical species involves, relaxation times, activation energies, jump distances and orientations. We performed a series of experiments in the perfect icosahedral phases AlFeCu and AlMnPd, on both powders and single domain samples, using time-of-flight, backscattering and triple axis spectrometers. We evidenced the existence of very fast phason hopping, and studied about ten different atomic jumps. An unusual temperature dependence has been found systematically: each process is assisted by a thermally activated mechanism. The assistance process has to be determined case by case, but the more plausible explanation invokes assistance by phonons or phason clouds. Moreover, the dependence of the quasi elastic signal as a function of the momentum transfer shows that the jumps are local and do not give rise to any long-range diffusion. Phason hopping mainly corresponds to the atom moving forwards and backwards between two energetically equivalent sites. Finally, we have been able to show that the jumps occur along the various quasi-crystalline symmetry axes. (author) 91 refs.

Effects of a school-based sexuality education program on peer educators: the Teen PEP model

OpenAIRE

Jennings, J. M.; Howard, S.; Perotte, C. L.

2014-01-01

This study evaluated the impact of the Teen Prevention Education Program (Teen PEP), a peer-led sexuality education program designed to prevent unintended pregnancy and sexually transmitted infections (STIs) including HIV among high school students. The study design was a quasi-experimental, nonrandomized design conducted from May 2007 to May 2008. The sample consisted of 96 intervention (i.e. Teen PEP peer educators) and 61 comparison students from five high schools in New Jersey. Baseline a...

A quasi-experimental investigation of message appeal variations on organ donor registration rates.

Science.gov (United States)

Siegel, Jason T; Alvaro, Eusebio M; Crano, William D; Lac, Andrew; Ting, Sarah; Jones, Sara Pace

2008-03-01

Approximately 6,000 Americans die every year awaiting an organ transplant. Health promotion interventions may alleviate the shortage of viable organs by increasing the number of registered organ donors. This study is the first to evaluate the differential effectiveness of various organ donor messages in naturalistic settings. A 4 (Appeal)x4 (Exemplar)x4 (Location) counterbalanced quasi-experimental design was implemented. The behavioral outcome measure was the number of individuals who registered to be organ donors at computer kiosks. A number of significant main effects and interactions emerged. Most notably, of the 4 different appeals (counterargument, emotional, motivating action, dissonance), counterargument was by far the most efficacious, especially in academic-type settings (library, university, community college); the emotional appeal was most successful in hospitals. The findings from this study have implications for both organ donor investigations and health campaign research in general. Statistical interactions highlight the importance of evaluating multiple exemplars in multiple locations for each type of appeal when conducting health campaign research. Copyright (c) 2008 APA, all rights reserved.

Effectiveness of a first-aid intervention program applied by undergraduate nursing students to preparatory school children.

Science.gov (United States)

Wafik, Wagida; Tork, Hanan

2014-03-01

Childhood injuries constitute a major public health problem worldwide. First aid is an effective life-preservation tool at work, school, home, and in public locations. In this study, the effectiveness of a first-aid program delivered by undergraduate nursing students to preparatory school children was examined. This quasi-experimental study was carried out on 100 school children in governmental preparatory schools in Egypt. The researchers designed a program for first-aid training, and this was implemented by trained nursing students. The evaluation involved immediate post-test and follow-up assessment after two months. The results showed generally low levels of satisfactory knowledge and inadequate situational practice among the school students before the intervention. Statistically-significant improvements were shown at the post- and follow-up tests. Multivariate regression analysis identified the intervention and the type of school as the independent predictors of the change in students' knowledge score, while the intervention and the knowledge score were the predictors of the practice score. The study concluded that a first-aid training program delivered by nursing students to preparatory school children is effective in improving their knowledge and practice. © 2013 Wiley Publishing Asia Pty Ltd.

Psycho-educational program for high school females

OpenAIRE

Perla Caridad López Hernández; Laura López Angulo; Eneida Bravo Polanco; Carmen Benítez Cabrera; Lisbet Cepero Águila; Rafael Luis Pino Pich

2010-01-01

Introduction: sex education provides knowledge, values and attitudes that both, men and women need to live with dignity and develop fully and happily. Objective: to determine the usefulness of applying a psycho-educational program on female sexuality in high school. Methods: a quasi-experimental study conducted between September 2007 and June 2008, based on a sample composed of 180 ninth grade females living in Cumanayagua's urban area. Variables analyzed: adolescents knowledge on sex-relate...

Effects of Lecture Method Supplemented with Music and Computer Animation on Senior Secondary School Students' Academic Achievement in Electrochemistry

Science.gov (United States)

Akpoghol, T. V.; Ezeudu, F. O.; Adzape, J. N.; Otor, E. E.

2016-01-01

The study investigated the effects of Lecture Method Supplemented with Music (LMM) and Computer Animation (LMC) on senior secondary school students' academic achievement in electrochemistry in Makurdi metropolis. Six research questions and six hypotheses guided the study. The design of the study was quasi experimental, specifically the pre-test,…

Evidence for several dipolar quasi-invariants in liquid crystals

Science.gov (United States)

Bonin, C. J.; González, C. E.; Segnorile, H. H.; Zamar, R. C.

2013-10-01

The quasi-equilibrium states of an observed quantum system involve as many constants of motion as the dimension of the operator basis which spans the blocks of all the degenerate eigenvalues of the Hamiltonian that drives the system dynamics, however, the possibility of observing such quasi-invariants in solid-like spin systems in Nuclear Magnetic Resonance (NMR) is not a strictly exact prediction. The aim of this work is to provide experimental evidence of several quasi-invariants, in the proton NMR of small spin clusters, like nematic liquid crystal molecules, in which the use of thermodynamic arguments is not justified. We explore the spin states prepared with the Jeener-Broekaert pulse sequence by analyzing the time-domain signals yielded by this sequence as a function of the preparation times, in a variety of dipolar networks, solids, and liquid crystals. We observe that the signals can be explained with two dipolar quasi-invariants only within a range of short preparation times, however at longer times liquid crystal signals show an echo-like behaviour whose description requires assuming more quasi-invariants. We study the multiple quantum coherence content of such signals on a basis orthogonal to the z-basis and see that such states involve a significant number of correlated spins. Therefore, we show that the NMR signals within the whole preparation time-scale can only be reconstructed by assuming the occurrence of multiple quasi-invariants which we experimentally isolate.

Effects of ICT Assisted Real and Virtual Learning on the Performance of Secondary School Students

Science.gov (United States)

Deka, Monisha; Jena, Ananta Kumar

2017-01-01

The study aimed to assess the effect of ICT assisted real and virtual learning performance over the traditional approach of secondary school students. Non-Equivalent Pretest-Posttest Quasi Experimental Design used to assess and relate the effects of independent variables virtual learning on dependent variables (i.e. learning performance).…

School start time influences melatonin and cortisol levels in children and adolescents - a community-based study.

Science.gov (United States)

Carissimi, Alicia; Martins, Alessandra Castro; Dresch, Fabiane; da Silva, Lilian Corrêa; Zeni, Cristian Patrick; Hidalgo, Maria Paz

2016-01-01

School start time influences sleep parameters. Differences between circadian sleep parameters on weekends and weekdays have been associated with obesity, sleep, and psychiatric disorders. Moreover, circadian rhythm dysregulation affects the secretion of some hormones, such as melatonin and cortisol. In the current study, we investigate the effect of school start time on cortisol and melatonin levels in a community sample of Brazilian children and adolescents. This was a cross-sectional study of 454 students (mean age, 12.81 ± 2.56 years; 58.6% female). From this sample, 80 participants were randomly selected for saliva collection to measure melatonin and cortisol levels. Circadian sleep parameters were assessed by self-reported sleep and wake up schedules and the Morningness-Eveningness Questionnaire. The outcomes, salivary melatonin and cortisol levels, were measured in morning, afternoon and night saliva samples, and behavior problems were assessed using the Child Behavior Checklist (CBCL). The main results revealed that morning school start time decreased the secretion of melatonin. Morning melatonin levels were significantly positively correlated with the sleep midpoint on weekdays and on weekends. Afternoon melatonin levels were positively correlated with the sleep midpoint on weekends in the morning school students. Conversely, in the afternoon school students, night melatonin levels were negatively correlated with the sleep midpoint on weekdays. Cortisol secretion did not correlate with circadian sleep parameters in any of the school time groups. In conclusion, school start time influences melatonin secretion, which correlated with circadian sleep parameters. This correlation depends on the presence of psychiatric symptoms. Our findings emphasize the importance of drawing attention to the influence of school start time on the circadian rhythm of children and adolescents.

Effectiveness of Student Learning during Experimental Work in Primary School.

Science.gov (United States)

Logar, Ana; Peklaj, Cirila; Ferk Savec, Vesna

2017-09-01

The aim of the research was to optimize the effectiveness of student learning based on experimental work in chemistry classes in Slovenian primary schools. To obtain evidence about how experimental work is implemented during regular chemistry classes, experimental work was videotaped during 19 units of chemistry lessons at 12 Slovenian primary schools from the pool of randomly selected schools. Altogether 332 eight-grade students were involved in the investigation, with an average age of 14.2 years. Students were videotaped during chemistry lessons, and their worksheets were collected afterward. The 12 chemistry teachers, who conducted lessons in these schools, were interviewed before the lessons; their teaching plans were also collected. The collected data was analyzed using qualitative methods. The results indicate that many teachers in Slovenian primary schools are not fully aware of the potential of experimental work integrated into chemistry lessons for the development of students' experimental competence. Further research of the value of different kinds of training to support teachers for the use of experimental work in chemistry teaching is needed.

Effects of an intensive clinical skills course on senior nursing students' self-confidence and clinical competence: A quasi-experimental post-test study.

Science.gov (United States)

Park, Soohyun

2018-02-01

To foster nursing professionals, nursing education requires the integration of knowledge and practice. Nursing students in their senior year experience considerable stress in performing the core nursing skills because, typically, they have limited opportunities to practice these skills in their clinical practicum. Therefore, nurse educators should revise the nursing curricula to focus on core nursing skills. To identify the effect of an intensive clinical skills course for senior nursing students on their self-confidence and clinical competence. A quasi-experimental post-test study. A university in South Korea during the 2015-2016 academic year. A convenience sample of 162 senior nursing students. The experimental group (n=79) underwent the intensive clinical skills course, whereas the control group (n=83) did not. During the course, students repeatedly practiced the 20 items that make up the core basic nursing skills using clinical scenarios. Participants' self-confidence in the core clinical nursing skills was measured using a 10-point scale, while their clinical competence with these skills was measured using the core clinical nursing skills checklist. Independent t-test and chi-square tests were used to analyze the data. The mean scores in self-confidence and clinical competence were higher in the experimental group than in the control group. This intensive clinical skills courses had a positive effect on senior nursing students' self-confidence and clinical competence for the core clinical nursing skills. This study emphasizes the importance of reeducation using a clinical skills course during the transition from student to nursing professional. Copyright © 2017. Published by Elsevier Ltd.

Computational study of packing a collagen-like molecule: quasi-hexagonal vs "Smith" collagen microfibril model.

Science.gov (United States)

Lee, J; Scheraga, H A; Rackovsky, S

1996-01-01

The lateral packing of a collagen-like molecule, CH3CO-(Gly-L-Pro-L-Pro)4-NHCH3, has been examined by energy minimization with the ECEPP/3 force field. Two current packing models, the Smith collagen microfibril twisted equilateral pentagonal model and the quasi-hexagonal packing model, have been extensively investigated. In treating the Smith microfibril model, energy minimization was carried out on various conformations including those with the symmetry of equivalent packing, i.e., in which the triple helices were arranged equivalently with respect to each other. Both models are based on the experimental observation of the characteristic axial periodicity, D = 67 nm, of light and dark bands, indicating that, if any superstructure exists, it should consist of five triple helices. The quasi-hexagonal packing structure is found to be energetically more favorable than the Smith microfibril model by as much as 31.2 kcal/mol of five triple helices. This is because the quasi-hexagonal packing geometry provides more nonbonded interaction possibilities between triple helices than does the Smith microfibril geometry. Our results are consistent with recent x-ray studies with synthetic collagen-like molecules and rat tail tendon, in which the data were interpreted as being consistent with either a quasi-hexagonal or a square-triangular structure.

Norms as Group-Level Constructs: Investigating School-Level Teen Pregnancy Norms and Behaviors.

Science.gov (United States)

Mollborn, Stefanie; Domingue, Benjamin W; Boardman, Jason D

2014-09-01

Social norms are a group-level phenomenon, but past quantitative research has rarely measured them in the aggregate or considered their group-level properties. We used the school-based design of the National Longitudinal Study of Adolescent Health to measure normative climates regarding teen pregnancy across 75 U.S. high schools. We distinguished between the strength of a school's norm against teen pregnancy and the consensus around that norm. School-level norm strength and dissensus were strongly (r = -0.65) and moderately (r = 0.34) associated with pregnancy prevalence within schools, respectively. Normative climate partially accounted for observed racial differences in school pregnancy prevalence, but norms were a stronger predictor than racial composition. As hypothesized, schools with both a stronger average norm against teen pregnancy and greater consensus around the norm had the lowest pregnancy prevalence. Results highlight the importance of group-level normative processes and of considering the local school environment when designing policies to reduce teen pregnancy.

WAGES AND COMMUTING: QUASI-NATURAL EXPERIMENTS’ EVIDENCE FROM FIRMS THAT RELOCATE

DEFF Research Database (Denmark)

Mulalic, Ismir; N. Van Ommeren, Jos; Pilegaard, Ninette

2014-01-01

We examine individual-level compensating differentials for commuting distance in a quasi-natural experiment setting by examining how wages respond to changes in commuting distance induced by firm relocations. This set-up enables us to test for the relevance of job search frictions within labour...... market models. Due to the quasi-experimental set-up, we are able to avoid a range of endogeneity issues. We demonstrate that a 1 km increase in commuting distance induces an almost negligible wage increase in the year after the relocation but a more substantial wage increase of about 0.15% three years...

Wages and commuting: quasi-natural experiments' evidence from firms that relocate

DEFF Research Database (Denmark)

Mulalic, Ismir; N. Van Ommeren, Jos; Pilegaard, Ninette

2014-01-01

We examine individual-level compensating differentials for commuting distance in a quasi-natural experiment setting by examining how wages respond to changes in commuting distance induced by firm relocations. This set-up enables us to test for the relevance of job search frictions within labour...... market models. Due to the quasi-experimental set-up, we are able to avoid a range of endogeneity issues. We demonstrate that a 1 km increase in commuting distance induces an almost negligible wage increase in the year after the relocation but a more substantial wage increase of about 0.15% three years...

The quasi experimental study of the influence of advertising creativity and exposure intensity toward buying action with aida approach

Directory of Open Access Journals (Sweden)

Ramdan Dede Budiawan

2017-06-01

Full Text Available Advertisement is one of marketing communication forms made by companies to reach sales goal of certain product. Advertising creativity is one of important factors that determines the success of television advertisement, beside that the exposure intensity also be determining factor to make the television advertisement get attention from spectators. To measure the spectators response toward advertisement in this research, the researcher used AIDA model. AIDA (attention, interest, desire, action model is one of popular response hierarchy models for marketer as guidance to implement the marketing communication activities. The thesis analyzes the influence of advertising creativity and exposure intensity toward the buying action as the final stage of consumer in deciding the decision to buy product. The research used quasi experimental study to 80 respondents as the target market of the advertised, that is ice cream of Haan brand. The experiment as done in 2 treatments, treatment 1: one advertising exposure and treatment 2: three advertising exposures. The Mann Whitney difference test with SPSS program showed no significant differences between treatment of 1 exposure and 3 exposures. The SEM PLS analysis showed that advertising creativity influenced significantly to attention, interest, desire and action in buying product.

Quasi-molecular states in sd-shell nuclei

International Nuclear Information System (INIS)

Kubono, S.; Ikeda, N.; Nomura, T.

1988-08-01

Quasi-molecular states near and below the threshold of the molecular configuration in sd-shell nuclei are discussed using recent experimental data with particle-gamma coincidence method and particle-particle coincidence method. Possible quasi-molecular states have been identified in 24 Mg as well as in 28 Si and 32 S. The important role of quasi-molecular states are discussed, specifically for the shape evolution of nuclei as a function of excitation energy and angular momentum. (author)

Compression dynamics of quasi-spherical wire arrays with different linear mass profiles

International Nuclear Information System (INIS)

Mitrofanov, K. N.; Aleksandrov, V. V.; Gritsuk, A. N.; Grabovski, E. V.; Frolov, I. N.; Laukhin, Ya. N.; Oleinik, G. M.; Ol’khovskaya, O. G.

2016-01-01

Results of experimental studies of the implosion of quasi-spherical wire (or metalized fiber) arrays are presented. The goal of the experiments was to achieve synchronous three-dimensional compression of the plasma produced in different regions of a quasi-spherical array into its geometrical center. To search for optimal synchronization conditions, quasi-spherical arrays with different initial profiles of the linear mass were used. The following dependences of the linear mass on the poloidal angle were used: m_l(θ) ∝ sin"–"1θ and m_l(θ) ∝ sin"–"2θ. The compression dynamics of such arrays was compared with that of quasi-spherical arrays without linear mass profiling, m_l(θ) = const. To verify the experimental data, the spatiotemporal dynamics of plasma compression in quasi-spherical arrays was studied using various diagnostics. The experiments on three-dimensional implosion of quasi-spherical arrays made it possible to study how the frozen-in magnetic field of the discharge current penetrates into the array. By measuring the magnetic field in the plasma of a quasi-spherical array, information is obtained on the processes of plasma production and formation of plasma flows from the wire/fiber regions with and without an additionally deposited mass. It is found that penetration of the magnetic flux depends on the initial linear mass profile m_l(θ) of the quasi-spherical array. From space-resolved spectral measurements and frame imaging of plasma X-ray emission, information is obtained on the dimensions and shape of the X-ray source formed during the implosion of a quasi-spherical array. The intensity of this source is estimated and compared with that of the Z-pinch formed during the implosion of a cylindrical array.

Quasi-experimental designs in practice-based research settings: design and implementation considerations.

Science.gov (United States)

Handley, Margaret A; Schillinger, Dean; Shiboski, Stephen

2011-01-01

Although randomized controlled trials are often a gold standard for determining intervention effects, in the area of practice-based research (PBR), there are many situations in which individual randomization is not possible. Alternative approaches to evaluating interventions have received increased attention, particularly those that can retain elements of randomization such that they can be considered "controlled" trials. Methodological design elements and practical implementation considerations for two quasi-experimental design approaches that have considerable promise in PBR settings--the stepped-wedge design, and a variant of this design, a wait-list cross-over design, are presented along with a case study from a recent PBR intervention for patients with diabetes. PBR-relevant design features include: creation of a cohort over time that collects control data but allows all participants (clusters or patients) to receive the intervention; staggered introduction of clusters; multiple data collection points; and one-way cross-over into the intervention arm. Practical considerations include: randomization versus stratification, training run in phases; and extended time period for overall study completion. Several design features of practice based research studies can be adapted to local circumstances yet retain elements to improve methodological rigor. Studies that utilize these methods, such as the stepped-wedge design and the wait-list cross-over design, can increase the evidence base for controlled studies conducted within the complex environment of PBR.

Quasi fusion of 139La + 12C at intermediate energies. A study within the Landau Vlasov approach

International Nuclear Information System (INIS)

Suraud, E.; Schuck, P.

1988-07-01

An extensive study of the La + C reaction at 50 MeV/u is presented. A quasi fusion residue is found for any but very peripheral impact parameters, in agreement with recent experimental results. The same reaction is studied at higher energies and an approximate lower threshold for fusion is given. More symmetric systems are calculated showing a somewhat different behaviour

Experimental Research in School Psychology Internationally: An Assessment of Journal Publications and Implications for Internationalization

Science.gov (United States)

Begeny, John C.; Levy, Rebecca A.; Hida, Rahma; Norwalk, Kate

2018-01-01

Past studies have examined the contents of journal articles in school psychology, and more recently there has been increased interest in examining the frequency and characteristics of experimental studies appearing in school psychology journals. However, no prior studies have examined the international representation of experimental and…

Effectiveness of student learning during experimental work in primary school

OpenAIRE

Logar, Ana; Peklaj, Cirila; Ferk Savec, Vesna

2017-01-01

The aim of the research was to optimize the effectiveness of student learning based on experimental work in chemistry classes in Slovenian primary schools. To obtain evidence about how experimental work is implemented during regular chemistry classes, experimental work was videotaped during 19 units of chemistry lessons at 12 Slovenian primary schools from the pool of randomly selected schools. Altogether 332 eight-grade students were involved in the investigation, with an average...

A Phonologically Based Intervention for School-Age Children with Language Impairment: Implications for Reading Achievement

Science.gov (United States)

Ritter, Michaela J.; Park, Jungjun; Saxon, Terrill F.; Colson, Karen A.

2013-01-01

This study was conducted utilizing a quasi-experimental pre- and postgroup design to examine the effects of a phonologically based intervention aimed to improve phonological awareness (PA) and reading abilities in school-age children with language impairment (LI) in Grades 1 through 3. The intervention included instruction in PA and sound-symbol…

An evaluation of primary school students' views about noise levels in school

Directory of Open Access Journals (Sweden)

Nermin Bulunuz

2017-06-01

Full Text Available Effective education and teaching requires keeping classroom noise levels within specific limits. The purpose of this study is to evaluate students’ views about the noise level in school, its effects, and control of it at two primary schools (one public school and one private school located in a district of Bursa - within the scope of the TÜBİTAK 1001 project numbered 114K738. The research sample consists of 432 third and fourth graders, 223 of whom are from the public school and 209 of whom are from the private school. To collect data, a 20-question survey was administered to the students, and noise measurements were carried out in the schools. According to the findings obtained from the analysis of the answers from the student questionnaire, the students think that the noise level is high especially during break times. In parallel with the student views, the average noise level at break time during recess was found to be 74.56 dBA at the private primary school and 82.18 dBA at the public primary school. These values are much higher than the limits prescribed in the Regulation on Assessment and Management of Environmental Noise in Turkey (RAMEN European Union Harmonization Laws. The research findings show that this important problem must be dealt with urgently, and substantive efforts and activities must be launched to reduce high noise levels in schools.

A pilot study: Horticulture-related activities significantly reduce stress levels and salivary cortisol concentration of maladjusted elementary school children.

Science.gov (United States)

Lee, Min Jung; Oh, Wook; Jang, Ja Soon; Lee, Ju Young

2018-04-01

The effects of three horticulture-related activities (HRAs), including floral arranging, planting, and flower pressing were compared to see if they influenced changes on a stress scale and on salivary cortisol concentrations (SCC) in maladjusted elementary school children. Twenty maladjusted elementary school children were randomly assigned either to an experimental or control group. The control group carried out individual favorite indoor activities under the supervision of a teacher. Simultaneously, the ten children in the experimental group participated in a HRA program consisting of flower arrangement (FA), planting (P), and flower pressing (PF) activities, in which the other ten children in the control group did not take part. During nine sessions, the activities were completed as follows: FA-FA-FA, P-P-P, and PF-PF-PF; each session lasted 40 min and took place once a week. For the quantitative analysis of salivary cortisol, saliva was collected from the experimental group one week before the HRAs and immediately after the activities for 9 consecutive weeks at the same time each session. In the experimental group, stress scores of interpersonal relationship, school life, personal problems, and home life decreased after the HRAs by 1.3, 1.8, 4.2, and 1.3 points, respectively. In particular, the stress score of school life was significantly reduced (P < 0.01). In addition, from the investigation of the SCCs for the children before and after repeating HRAs three times, it was found that flower arrangement, planting, and flower pressing activities reduced the SCCs by ≥37% compared to the SCCs prior to taking part in the HRAs. These results indicate that HRAs are associated with a reduction in the stress levels of maladjusted elementary school children. Copyright © 2018. Published by Elsevier Ltd.

Effectiveness of school network for childhood obesity prevention (SNOCOP) in primary schools of Saraburi Province, Thailand.

Science.gov (United States)

Banchonhattakit, Pannee; Tanasugarn, Chanuantong; Pradipasen, Mandhana; Miner, Kathleen R; Nityasuddhi, Dechavudh

2009-07-01

This research was designed to test the effectiveness of a school network for childhood obesity prevention (SNOCOP) in primary schools; a program that aimed to improve student behavior in terms of knowledge, attitude, intention towards obesity prevention, and their food consumption behavior. A quasi-experimental pretest-posttest time series study was conducted. By 2-stage stratified sampling selection 180 students from 6 schools were assigned to the intervention group and 195 students from 6 schools to the control group at Saraburi Province, Thailand in 2006- 2007. In addition, thirty-one participants being school administrators, teachers, parents, and community members from six schools formed the social network initiating the intervention. The schoolchildren in the intervention group improved their eating behavior, knowledge, attitude, intention towards obesity preventive behavior. The six schools of the intervention group changed school policies and school activities aiming to reduce the proportion of obesity among their student. No such activities could be observed in the control group. These findings suggest that the School-Social Network of Childhood Obesity Prevention program is an effective means to prevent childhood obesity.

Relationships between the school-level and classroom-level ...

African Journals Online (AJOL)

education; school-level environment; science education; South Africa. Introduction .... instrument to the primary school students (N = 1,077) of 31 distance-education primary school teachers ..... Centre for Curriculum, Transfer and Technology.

Effects of Self-esteem Improvement Program on Self-esteem and Peer Attachment in Elementary School Children with Observed Problematic Behaviors

OpenAIRE

Park, Kyung Min; Park, Heeok

2015-01-01

Purpose: The purpose of this study was to investigate the effects of a self-esteem improvement program on self-esteem and peer attachment in elementary school children with observed problematic behaviors. Methods: This study is a quasi-experimental study with a nonequivalent control group pretest-post-test design. A total of 47 fourth grade elementary school students participated in this study. The program was provided for 45 minutes once a week; a total of 12 sessions were completed with ...

The effect of work-time influence on health and well-being: a quasi-experimental intervention study among eldercare workers.

Science.gov (United States)

Nabe-Nielsen, Kirsten; Garde, Anne Helene; Diderichsen, Finn

2011-08-01

The aim of this study was to investigate the effect of work-time influence on stress and energy, work-family conflicts, lifestyle factors, and biomarkers of cardiovascular disease risk. The study was a quasi-experimental intervention study with a one-year follow-up among eldercare workers (baseline: n = 309; follow-up: n = 297). The nine work units in the intervention group designed their own intervention. We categorized these work units into three subgroups according to the interventions that they initiated: (A) self-scheduling via a computer program (n = 35), (B) setting up a task group that developed a questionnaire on work-time preference and participated in a one-day course on flexible working hours with the intention to increase employee influence on the fixed rota (n = 62), and (C) discussions of how employee work-time influence could be increased (n = 25). These subgroups were compared with a reference group consisting of ten work units (n = 187). Data consisted of questionnaires, blood samples, and measurements of waist and hip circumference. The employees in subgroup A became increasingly involved in the planning of their own work schedule. Nevertheless, we found no effect on health and well-being attributable to the intervention. The introduction of self-scheduling can successfully increase employee work-time influence. Yet, this study does not support the theory that increased work-time influence leads to better health and well-being.

Development and evaluation of a self care program on breastfeeding in Japan: A quasi-experimental study

Directory of Open Access Journals (Sweden)

Awano Masayo

2010-08-01

Full Text Available Abstract Background Although the importance of breastfeeding is well known in Japan, in recent years less than 50% of mothers were fully breastfeeding at one month after birth. The purpose of this study was to develop a self-care program for breastfeeding aimed at increasing mothers' breastfeeding confidence and to evaluate its effectiveness. Methods A quasi-experimental pretest-posttest design was conducted in Japan. The intervention, a breastfeeding self-care program, was created to improve mothers' self-efficacy for breastfeeding. This Breastfeeding Self-Care Program included: information on the advantages and basics of breastfeeding, a breastfeeding checklist to evaluate breastfeeding by mothers and midwives, and a pamphlet and audiovisual materials on breastfeeding. Mothers received this program during their postpartum hospital stay. A convenience sample of 117 primiparous women was recruited at two clinical sites from October 2007 to March 2008. The intervention group (n = 55, who gave birth in three odd-numbered months, received standard care and the Breastfeeding Self-Care Program while the control group (n = 62 gave birth in three even numbered months and received standard breastfeeding care. To evaluate the effectiveness of the Breastfeeding Self-Care Program, breastfeeding self-efficacy and breastfeeding rate were measured early postpartum, before the intervention, and after the intervention at one month postpartum. The study used the Japanese version of The Breastfeeding Self-Efficacy Scale Short Form (BSES-SF to measure self-efficacy. Results The BSES-SF score of the intervention group rose significantly from 34.8 at early postpartum to 49.9 at one month after birth (p Conclusion Results indicate that the Breastfeeding Self-Care Program increased mothers' self-efficacy for breastfeeding and had a positive effect on the continuation of breastfeeding. Trial Registration Number UMIN000003517

Supporting 3rd-grade students model-based explanations about groundwater: a quasi-experimental study of a curricular intervention

Science.gov (United States)

Zangori, Laura; Vo, Tina; Forbes, Cory T.; Schwarz, Christina V.

2017-07-01

Scientific modelling is a key practice in which K-12 students should engage to begin developing robust conceptual understanding of natural systems, including water. However, little past research has explored primary students' learning about groundwater, engagement in scientific modelling, and/or the ways in which teachers conceptualise and cultivate model-based science learning environments. We are engaged in a multi-year project designed to support 3rd-grade students' formulation of model-based explanations (MBE) for hydrologic phenomenon, including groundwater, through curricular and instructional support. In this quasi-experimental comparative study of five 3rd-grade classrooms, we present findings from analysis of students' MBE generated as part of experiencing a baseline curricular intervention (Year 1) and a modelling-enhanced curricular intervention (Year 2). Findings show that students experiencing the latter version of the unit made significant gains in both conceptual understanding and reasoning about groundwater, but that these gains varied by classroom. Overall, student gains from Year 1 to Year 2 were attributed to changes in two of the five classrooms in which students were provided additional instructional supports and scaffolds to enhance their MBE for groundwater. Within these two classrooms, the teachers enacted the Year 2 curriculum in unique ways that reflected their deeper understanding about the practices of modelling. Their enactments played a critical role in supporting students' MBE about groundwater. Study findings contribute to research on scientific modelling in elementary science learning environments and have important implications for teachers and curriculum developers.

Effects of nuclear structure on quasi-fission

International Nuclear Information System (INIS)

Simenel, Cedric; Wakhle, Aditya; Hinde, D.J.; Rietz, R. du; Dasgupta, M.; Evers, M.; Lin, C.J.; Luong, D.H.; Avez, B.

2012-01-01

The quasi-fission mechanism hinders fusion of heavy systems because of a mass flow between the reactants, leading to a re-separation of more symmetric fragments in the exit channel. A good understanding of the competition between fusion and quasi-fission mechanisms is expected to be of great help to optimize the formation and study of heavy and superheavy nuclei. Quantum microscopic models, such as the time-dependent Hartree-Fock approach, allow for a treatment of all degrees of freedom associated to the dynamics of each nucleon. This provides a description of the complex reaction mechanisms, such as quasi-fission, with no parameter adjusted on reaction mechanisms. In particular, the role of the deformation and orientation of a heavy target, as well as the entrance channel magicity and isospin are investigated with theoretical and experimental approaches. (authors)

Search for quasi bound η mesons

International Nuclear Information System (INIS)

Machner, H

2015-01-01

The search for a quasi bound η meson in atomic nuclei is reviewed. This tentative state is studied theoretically as well as experimentally. The theory starts from elastic η nucleon scattering which is derived from production data within some models. From this interaction the η nucleus interaction is derived. Model calculations predict binding energies and widths of the quasi bound state. Another method is to derive the η nucleus interaction from excitation functions of η production experiments. The s wave interaction is extracted from such data via final state interaction (FSI) theorem. We give the derivation of s wave amplitudes in partial wave expansion and in helicity amplitudes and their relation to observables. Different experiments extracting the FSI are discussed as are production experiments. So far only three experiments give evidence for the existence of the quasi bound state: a pion double charge exchange experiment, an effective mass measurement, and a transfer reaction at recoil free kinematics with observation of the decay of the state. (topical review)

The Healthy Primary School of the Future: study protocol of a quasi-experimental study

NARCIS (Netherlands)

Willeboordse, Maartje; Jansen, Maria; Van den Heijkant, S.N.; Simons, Andrew; Winkens, B.; De Groot, Renate; Bartelink, Nina; Kremers, Stef; Van Assema, Patricia; Savelberg, Hans; De Neubourg, E.; Borghans, Lex; Schils, T.; Coppens, K.M.; Dietvorst, R.; Ten Hoopen, R.; Coomans, F.; Klosse, S.; Conjaerts, Martien; Oosterhoff, M.; Joore, Manuela; Ferreira, I.; Muris, P.; Bosma, Hans; Toppenberg, H.L.; Van Schayck, Onno

2017-01-01

Background: Unhealthy lifestyles in early childhood are a major global health challenge. These lifestyles often persist from generation to generation and contribute to a vicious cycle of health-related and social problems. This design article presents a study evaluating the effects of two novel

The Effect of Concept Mapping and Problem Solving Teaching Strategies on Achievement in Biology among Nigerian Secondary School Students

Science.gov (United States)

Okoye, Nnamdi S.; Okechukwu, Rose N.

2010-01-01

The study examined the effect of concept-mapping and problem-solving teaching strategies on achievement in biology among Nigerian secondary school students. The method used for the study was a quasi-experimental pre-test treatment design. One hundred and thirteen senior secondary three (S.S. 111) students randomly selected from three mixed…

Comparative studies on constitutive models for cohesive interface cracks of quasi-brittle materials

International Nuclear Information System (INIS)

Shen Xinpu; Shen Guoxiao; Zhou Lin

2005-01-01

In this paper, Concerning on the modelling of quasi-brittle fracture process zone at interface crack of quasi-brittle materials and structures, typical constitutive models of interface cracks were compared. Numerical calculations of the constitutive behaviours of selected models were carried out at local level. Aiming at the simulation of quasi-brittle fracture of concrete-like materials and structures, the emphases of the qualitative comparisons of selected cohesive models are focused on: (1) the fundamental mode I and mode II behaviours of selected models; (2) dilatancy properties of the selected models under mixed mode fracture loading conditions. (authors)

A quasi-experimental study on a community-based stroke prevention programme for clients with minor stroke.

Science.gov (United States)

Sit, Janet W H; Yip, Vera Y B; Ko, Stanley K K; Gun, Amy P C; Lee, Judy S H

2007-02-01

The aim of this study was to determine the effectiveness of a community-based stroke prevention programme in (1) improving knowledge about stroke; (2) improving self-health-monitoring practice; (3) maintaining behavioural changes when adopting a healthy lifestyle for stroke prevention. People with minor stroke (or transient ischaemic attack) tend to under-estimate the long-term impact of this on their health. The challenge for nurses is to prevent subsequent strokes by finding ways to promote and sustain appropriate behaviours. Educational intervention is of paramount importance in equipping those at risk with relevant knowledge and self-care strategies for secondary stroke prevention. This study adopted a quasi-experimental design. One hundred and ninety subjects were recruited, of whom 147 (77 in the intervention group and 70 in the control group) completed the study. Data were obtained at three time points: baseline (T0); one week after (T1) and three months after (T2) the intervention. The intervention programme consisted of eight weekly two-hour sessions, with the aims of improving the participants' awareness of their own health signals and of actively involving them in self-care management of their own health for secondary stroke prevention. Significant positive changes were found among participants of the intervention group in the knowledge on stroke warning signs (P lifestyle modification of dietary habits (reduction in salted food intake, P = 0.004). No significant improvement was found in walking exercise participation in the intervention group, yet a significant decrease was detected among the control group. This study found a three-month-sustained effect of positive changes in knowledge and skill from participants who undertook a nurse-led community-based stroke prevention programme. Effective educational intervention by professional nurses helped clients integrate their learned knowledge into their real-life practice. This empowering, that is, the

Are school-level factors associated with primary school students' experience of physical violence from school staff in Uganda?

Science.gov (United States)

Knight, Louise; Nakuti, Janet; Allen, Elizabeth; Gannett, Katherine R; Naker, Dipak; Devries, Karen M

2016-01-01

The nature and structure of the school environment has the potential to shape children's health and well being. Few studies have explored the importance of school-level factors in explaining a child's likelihood of experiencing violence from school staff, particularly in low-resource settings such as Uganda. To quantify to what extent a student's risk of violence is determined by school-level factors we fitted multilevel logistic regression models to investigate associations and present between-school variance partition coefficients. School structural factors, academic and supportive environment are explored. 53% of students reported physical violence from staff. Only 6% of variation in students' experience of violence was due to differences between schools and half the variation was explained by the school-level factors modelled. Schools with a higher proportion of girls are associated with increased odds of physical violence from staff. Students in schools with a high level of student perceptions of school connectedness have a 36% reduced odds of experiencing physical violence from staff, but no other school-level factor was significantly associated. Our findings suggest that physical violence by school staff is widespread across different types of schools in this setting, but interventions that improve students' school connectedness should be considered. © The Author 2015. Published by Oxford University Press on behalf of Royal Society of Tropical Medicine and Hygiene.

Creating Better Schools through Democratic School Leadership

Science.gov (United States)

San Antonio, Diosdado M.

2008-01-01

This paper examines the impact of implementing democratic school leadership via advisory school councils in Philippine public secondary schools. Through an experiment with empirical surveys and interviews, this study reveals that the experimental group had higher levels of commitment, empowerment and trust compared with the control group after one…

Low Dose Mesalazine Plus Bismuth Regimen and Symptoms of Irritable Bowel Syndrome in Patients with Bloating: A Quasi-Experimental Study

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Alavinejad

2016-08-01

Full Text Available Background The current study aimed to evaluate the efficacy of mesalazine plus bismuth on patients with irritable bowel syndrome (IBS and chief complaint of bloating. Methods The current quasi-experimental study, included patients with IBS and chief complaint of bloating and incomplete defecation. They were treated with masalazine and bismuth subcitrate and followed regularly based on monthly visits. The rate of symptoms relief, patients' satisfaction and any side effects were recorded during the surveillance. Results Overall, 42 patients (33 females and 9 males were included. The mean age of the patients was 35.9 years (ranged 22 - 67 years; 32%, 44% and 24% had high, medium and low socioeconomic levels, respectively; 96% of the patients were nonsmokers and just two patients had a history of alcohol consumption. Two patients had glucose intolerance, four had hypothyroidism and four had past history of valvular heart disease. In 20% of the patients, the family history for intestinal bowl disease (IBD was positive. Ten patients had a history of bloody diarrhea and no one had a history of any significant liver diseases. The most common symptoms of patients included incomplete defecation and tenesmus (41 patients, 97.6%, bloating (39 patients, 92.8%, abdominal fullness (35 patients, 83.3% and mucus discharge (30 patients, 71.4%. After an average six months of treatment (3 - 11 months, 69.1% of patients reported improvement of symptoms more than 50% (38.1%, ranged 75% - 100%, and 31% (ranged 50% - 75% indicated overall symptoms relief. The most significant improvement was reported for bloating (85%. There were no major side effects except minor degrees of diarrhea among 26% of the subjects. Conclusions The results of the study were indicative of improvement and symptom relief in the majority of patients and it seems that treatment prolongation up to six months could be a key factor to achieve better clinical responses. It is recommended that further

Comparison of three-phase three-level voltage source inverter with intermediate dc–dc boost converter and quasi-Z-source inverter

DEFF Research Database (Denmark)

Panfilov, Dmitry; Husev, Oleksandr; Blaabjerg, Frede

2016-01-01

This study compares a three-phase three-level voltage source inverter with an intermediate dc-dc boost converter and a quasi-Z-source inverter in terms of passive elements values and dimensions, semiconductor stresses, and overall efficiency. A comparative analysis was conducted with relative...

The Effectiveness of Self Management Program on Pain, Fatigue, Depression, Anxiety, and Stress in Sickle Cell Patients: A Quasi-Experimental Study

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Ahmadi

2015-10-01

Full Text Available Background Patients with sickle cell disease, who must manage serious and unpredictable complications related to their disease, particularly chronic pain, suffer from numerous psychosocial problems such as depression, anxiety, stress, and disruption of interpersonal relationships; these problems often lead to fatigue and poor quality of life. Objectives This study aimed to determine the effectiveness of self-management programs targeting pain, fatigue, depression, anxiety, and stress in sickle cell patients. Patients and Methods This was a quasi-experimental study; participants were 53 patients with sickle cell disease who were referred to the Thalassemia Clinic of Ahvaz Shafa Hospital. Participants were recruited by census in 2013. Participants received a self-management program that was implemented in five sessions over 12 weeks. Levels of fatigue, depression, anxiety, and stress were assessed before and 24 weeks after the intervention; pain was assessed during the intervention and at a 24 week post-intervention follow-up using the fatigue severity scale (FSS, DASS21, and a pain record. Descriptive statistics, Fisher’s exact test, Chi-square, independent t-tests, paired t-tests, repeated measures tests and correlations were used to analyze the data. Results Scores for fatigue, anxiety, depression, and stress after the intervention were significantly decreased compared to before the intervention (P < 0.001. Repeated measures testing showed that mean scores for frequency and duration of pain decreased significantly during the 12 weeks of intervention, as well as during the 24 weeks of follow-up (P < 0.001. Conclusions The results suggest the effectiveness of self-management programs on the reduction of pain, fatigue, anxiety, depression, and stress in sickle cell patients. Therefore, self-management programs are advisable in order to empower patients and assist their management of health-related problems.

Studies of self-pollution in diesel school buses: methodological issues.

Science.gov (United States)

Borak, Jonathan; Sirianni, Greg

2007-09-01

Considerable interest has focused on levels of exhaust emissions in the cabins of diesel-powered school buses and their possible adverse health effects. Significantly different policy and engineering issues would be raised if compelling evidence found that inc-cabin contamination was due to self-pollution from bus emissions, rather than ambient pollution, neighboring vehicles, and/or re-entrained road dust. We identified 19 reports from 11 studies that measured diesel exhaust particulate in the cabins of 58 school bus of various type. Studies were evaluated in light of their experimental design, their data quality, and their capacity to quantify self-pollution. Only one study had a true experimental design, comparing the same buses with and without emission controls, while four others used intentional tracers to quantify tail pipe and/or crankcase emissions. Although definitive data are still lacking, these studies suggest that currently available control technologies can nearly eliminate particulate self-pollution inside diesel school buses.

Lifestyle intervention as a treatment for obesity in school-age-children in Celaya, Guanajuato: An experimental study

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Nicolas Padilla-Raygoza

2013-03-01

Full Text Available Introduction: Obesity is a risk factor in chronic diseases, and its frequency among children in Mexico is increasing. Objective: To determine the effect of lifestyle intervention as a treatment for obesity in school-age-children from Celaya, Mexico.Methodology: For this experimental study, four schools were randomly selected. Children and parents participated voluntarily and signed consent forms. Two schools were chosen as the experimental group and the other two formed the control group. Age, gender, weight, height, BMI and blood pressure were recorded for each participant. Intervention: Children and parents were asked to walk in their schools for 30 minutes a day Monday through Friday and to attend 8 instructional sessions over a period of four months dedicated to the selection and preparation of meals. Statistical Analysis: The OR and 95% CI were calculated to determine the effect of the intervention; a Z-test for two proportions for overweight and obesity in the control and experimental groups were carried out for comparison.Results: 157 children were included in the experimental group and 144 in the control group. To compare the proportions of the overweight and the obese between the groups, a Z-test = - 0.36 (p-value 0.72 were obtained showing no effect of the intervention in lifestyle; OR =1.09, 95% CI (0.67, 1.77. It was adjusted according to the attendance to the sessions resulting in an OR = 2.00, 95% CI (0.69, 5.77, demonstrating that not attending the sessions was a confounder.Conclusions: Intervention in lifestyle should be measured over a longer period of time in order to determine what effects it may have on changes in body mass index.

Propagation & Level: Factors Influencing in the ICT Composite Index at the School Level

Science.gov (United States)

Aoki, Hiroyuki; Kim, JaMee; Lee, WonGyu

2013-01-01

Many nations are greatly affected by their education policies, and the educational level of different schools is relevant to a nation's ICT policy. In the area of ICT, Korea has achieved quite high levels of competency. This study analyzed the level of ICT competency of 4490 elementary and 2419 middle schools in Korea within the context of the…

Arsenolite: a quasi-hydrostatic solid pressure-transmitting medium

International Nuclear Information System (INIS)

Sans, J A; Manjón, F J; Popescu, C; Muñoz, A; Rodríguez-Hernández, P; Jordá, J L; Rey, F

2016-01-01

This study reports the experimental characterization of the hydrostatic properties of arsenolite (As 4 O 6 ), a molecular solid which is one of the softest minerals in the absence of hydrogen bonding. The high compressibility of arsenolite and its stability up to 15 GPa have been proved by x-ray diffraction measurements, and the progressive loss of hydrostaticity with increasing pressure up to 20 GPa has been monitored by ruby photoluminescence. Arsenolite has been found to exhibit hydrostatic behavior up to 2.5 GPa and a quasi-hydrostatic behavior up to 10 GPa at room temperature. This result opens the way to explore other molecular solids as possible quasi-hydrostatic pressure-transmitting media. The validity of arsenolite as an insulating, stable, non-penetrating and quasi-hydrostatic medium is explored by the study of the x-ray diffraction of zeolite ITQ-29 at high pressure. (paper)

Bullying and Victimisation in School Children: The Role of Social Identity, Problem-Solving Style, and Family and School Context

Science.gov (United States)

Cassidy, Tony

2009-01-01

The relationship between social identity, family and school context, problem-solving style, self-esteem, health behaviour, psychological distress, and victimisation, was explored in a quasi-experimental survey of 461 children aged between 11 and 15 years old. There was a high prevalence of victimisation (29%) in the group and 44% of those…

Ordered Effects of Technology Education Units on Higher-Order Critical Thinking Skills of Middle School Students

Science.gov (United States)

Mojica, Kern D.

2010-01-01

In this quasi-experimental quantitative study, 105 eighth grade students at a suburban middle school in New York State participated in a seven month-long project involving the ordered effects of the technology education units of Lego[R] Mindstorms(TM) NXT Robotics System, Digital Storytelling with Microsoft Windows Movie Maker, and the Marble Maze…

Quasi-static and dynamic experimental studies on the tensile strength and failure pattern of concrete and mortar discs.

Science.gov (United States)

Jin, Xiaochao; Hou, Cheng; Fan, Xueling; Lu, Chunsheng; Yang, Huawei; Shu, Xuefeng; Wang, Zhihua

2017-11-10

As concrete and mortar materials widely used in structural engineering may suffer dynamic loadings, studies on their mechanical properties under different strain rates are of great importance. In this paper, based on splitting tests of Brazilian discs, the tensile strength and failure pattern of concrete and mortar were investigated under quasi-static and dynamic loadings with a strain rate of 1-200 s -1 . It is shown that the quasi-static tensile strength of mortar is higher than that of concrete since coarse aggregates weaken the interface bonding strength of the latter. Numerical results confirmed that the plane stress hypothesis lead to a lower value tensile strength for the cylindrical specimens. With the increase of strain rates, dynamic tensile strengths of concrete and mortar significantly increase, and their failure patterns change form a single crack to multiple cracks and even fragment. Furthermore, a relationship between the dynamic increase factor and strain rate was established by using a linear fitting algorithm, which can be conveniently used to calculate the dynamic increase factor of concrete-like materials in engineering applications.

Effects of a pilates school program on hamstrings flexibility of adolescents

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Noelia González-Gálvez

2015-08-01

Full Text Available INTRODUCTION: Low levels of hamstring flexibility may trigger certain acute and chronic pathologies and injuries. Poor flexibility is observed among teenagers and several authors have recommended the use of specific programs in this population to improve flexibility levels. The Pilates Method (PM may be an appropriate intervention to achieve this purpose and has rarely been used with this population. Objective: Study was to assess changes in the flexibility of hamstrings after running a didactic PM unit for high-school students.METHODS: This research was developed through a quasi-experimental design. The sample consisted of 66 high-school students divided into experimental group (EG=39 and control group (CG=27. The intervention was carried out 2 times a week for six weeks. Each session lasted 55 minutes divided into three parts: warm-up, main part and cool down. Hamstring flexibility was assessed using the toe-touch test. Paired Student t-test and t-test for independent samples were applied. The size of the effect (d was determined.RESULTS: The EG showed significant provident in hamstring flexibility (+3.54±3.9cm. The effect size was low (d>d>0,2d>0.21.15 which means that a large proportion of participants improved their results.CONCLUSION: This study showed that six-weeks of Pilates training in Physical Education classes has significantly improved the hamstrings flexibility among adolescents.

Quintessential quartic quasi-topological quartet

Energy Technology Data Exchange (ETDEWEB)

Ahmed, Jamil [Department of Physics and Astronomy, University of Waterloo,200 University Avenue West, Waterloo, ON, N2L 3G1 (Canada); Department of Mathematics, Quaid-i-Azam University,Islamabad (Pakistan); Hennigar, Robie A. [Department of Physics and Astronomy, University of Waterloo,200 University Avenue West, Waterloo, ON, N2L 3G1 (Canada); Mann, Robert B. [Department of Physics and Astronomy, University of Waterloo,200 University Avenue West, Waterloo, ON, N2L 3G1 (Canada); Perimeter Institute,31 Caroline Street North, Waterloo, ON, N2L 2Y5 (Canada); Mir, Mozhgan [Department of Physics and Astronomy, University of Waterloo,200 University Avenue West, Waterloo, ON, N2L 3G1 (Canada); School of Physics, Institute for Research in Fundamental Sciences (IPM),P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

2017-05-25

We construct the quartic version of generalized quasi-topological gravity, which was recently constructed to cubic order in https://arxiv.org/abs/1703.01631. This class of theories includes Lovelock gravity and a known form of quartic quasi-topological gravity as special cases and possess a number of remarkable properties: (i) In vacuum, or in the presence of suitable matter, there is a single independent field equation which is a total derivative. (ii) At the linearized level, the equations of motion on a maximally symmetric background are second order, coinciding with the linearized Einstein equations up to a redefinition of Newton’s constant. Therefore, these theories propagate only the massless, transverse graviton on a maximally symmetric background. (iii) While the Lovelock and quasi-topological terms are trivial in four dimensions, there exist four new generalized quasi-topological terms (the quartet) that are nontrivial, leading to interesting higher curvature theories in d≥4 dimensions that appear well suited for holographic study. We construct four dimensional black hole solutions to the theory and study their properties. A study of black brane solutions in arbitrary dimensions reveals that these solutions are modified from the ‘universal’ properties they possess in other higher curvature theories, which may lead to interesting consequences for the dual CFTs.

Science Writing Heuristics Embedded in Green Chemistry: A Tool to Nurture Environmental Literacy among Pre-University Students

Science.gov (United States)

Shamuganathana, Sheila; Karpudewan, Mageswary

2017-01-01

Existing studies report on the importance of instilling environmental literacy among students from an early stage of schooling to enable them to adopt more pro-environmental behaviors in the near future. This quasi-experimental study was designed to compare the level of environmental literacy among two groups of students: the experimental group (N…

Experimental study on intermediate level radioactive waste processing

International Nuclear Information System (INIS)

Nagakura, Tadashi; Abe, Hirotoshi; Okazawa, Takao; Hattori, Seiichi; Maki, Yasuro

1977-01-01

In the disposal of intermediate level radioactive wastes, multilayer package will be adopted. The multilayer package consists of cement-solidified waste and a container such as a drum - can with concrete liner or a concrete container. So, on the waste to be cement-solidified in such container, experimental study was carried out as follows. (1) Cement-solidification method. (2) Mechanical behaviour of cement-solidified waste. The mechanical behaviour of the containers was studied by the finite element method and experiment, and the function of pressure-balancing valves was also studied. The following data on processing intermediate level radioactive wastes were obtained. (1) In the case of cement-solidified waste, the data to select the suitable solidifying material and the standard mixing proportion were determined. (2) The basic data concerning the uniaxial compressive strength of cement-solidified waste, the mechanical behaviour of cement-solidified waste packed in a drum under high hydrostatic pressure, the shock response of cement-solidified waste at the time of falling and so on were obtained. (3) The pressure-balancing valves worked at about 0.5 Kg/cm 2 pressure difference inside and outside a container, and the deformation of a drum cover was 10 to 13 mm. In case of the pressure difference less than 0,5 Kg/cm 2 , the valves shut, and water flow did occur. (auth.)

A School-Level Proxy Measure for Individual-level Poverty Using School-Level Eligibility for Free and Reduced-Price Meals

Science.gov (United States)

Day, Sophia E.; Hinterland, Kinjia; Myers, Christa; Gupta, Leena; Harris, Tiffany G.; Konty, Kevin J.

2016-01-01

Background: Socioeconomic status (SES) impacts health outcomes. The Youth Risk Behavior Survey (YRBS), like many school-based data sources, lacks individual-level poverty information. We propose using school-level percentages of student eligibility for free/reduced-price meals (%FRPM) as a proxy for individual-level poverty. Methods: Using the New…

Strong quasi-particle tunneling study in the paired quantum Hall states

OpenAIRE

Nomura, Kentaro; Yoshioka, Daijiro

2001-01-01

The quasi-particle tunneling phenomena in the paired fractional quantum Hall states are studied. A single point-contact system is first considered. Because of relevancy of the quasi-particle tunneling term, the strong tunneling regime should be investigated. Using the instanton method it is shown that the strong quasi-particle tunneling regime is described as the weak electron tunneling regime effectively. Expanding to the network model the paired quantum Hall liquid to insulator transition i...

Impact of an Outdoor Smoking Ban at Secondary Schools on Cigarettes, E-Cigarettes and Water Pipe Use among Adolescents: An 18-Month Follow-Up.

OpenAIRE

Rozema, Andrea D; Hiemstra, Marieke; Mathijssen, Jolanda J P; Jansen, Maria W J; van Oers, Hans J A M

2018-01-01

Abstract: The effectiveness of outdoor smoking bans on smoking behavior among adolescents remains inconclusive. This study evaluates the long-term impact of outdoor school ground smoking bans among adolescents at secondary schools on the use of conventional cigarettes, e-cigarettes (with/without nicotine) and water pipes. Outdoor smoking bans at 19 Dutch secondary schools were evaluated using a quasi-experimental design. Data on 7733 adolescents were obtained at baseline, and at 6 and 18-mont...

Optical bistability in the oscillation of an inhomogeneously broadened quasi-three-level laser

International Nuclear Information System (INIS)

Liu, Junhai; Tian, Xueping

2013-01-01

A theoretical modeling analysis is presented to study the optical bistability exhibited in the oscillation of an inhomogeneously broadened quasi-three-level laser. All the major characteristics of optical bistability depend on two normalized parameters, f and x a , which are defined by f = I sat,a /I sat,m and x a = 2α a0 p a /δ and are related to measurable properties of the laser medium. In comparison with the case of a homogeneously broadened laser, the essential condition for the occurrence of such bistability, f a /(x a + 1), turns out to be the same, whereas the intensities at the up- and down-thresholds are substantially increased and the bistability range is reduced. (paper)

Project on Social Architecture in Education. Final Report. Part III: Case Studies. Chapter 9: Arts Co-op: An Experimental High School Program.

Science.gov (United States)

Sullivan, Ellen Wahl

This document contains chapter 9 of the final report of the Project on Social Architecture in Education. Chapter 9 is about a regional experimental high school program for the arts. Several features distinguished Arts Co-op from the other schools in the study. For one, it was a special purpose school, focused on the arts, and not offering a…

Non-Print Social Studies Materials--Elementary School Level.

Science.gov (United States)

Lynn, Karen

Types of non-print social studies materials developed for presentation to, and use by, elementary school students are identified. "Non-print" materials include films, filmstrips, video cassettes, audio recordings, computer databases, telecommunications, and hypertext. An explanation of why elementary school students can benefit from the use of…

Thermodynamical Study of FRW Universe in Quasi-Topological Theory

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H. Moradpour

2016-01-01

Full Text Available By applying the unified first law of thermodynamics on the apparent horizon of FRW universe, we get the entropy relation for the apparent horizon in quasi-topological gravity theory. Throughout the paper, the results of considering the Hayward-Kodama and Cai-Kim temperatures are also addressed. Our study shows that whenever there is no energy exchange between the various parts of cosmos, we can get an expression for the apparent horizon entropy in quasi-topological gravity, which is in agreement with other attempts that followed different approaches. The effects of a mutual interaction between the various parts of cosmos on the apparent horizon entropy as well as the validity of second law of thermodynamics in quasi-topological gravity are perused.

A Study on the Level of Intercultural Knowledge among Malaysian Secondary School Students

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Fatin Najwa Amelia binti Marsani

2016-11-01

Full Text Available Malaysia is typified by three major ethnic groups namely Malay, Chinese and Indian.  The evolution of national unity in Malaysia, which is based on acceptance and tolerance towards different cultures has been allowed to flourish in tandem with the realization of national aspirations.  Even though education system is seen to be the best tool to cultivate team work among these three major ethnic groups, contemporary research reveals that there is still a lack of intercultural embedment in both tertiary and non-tertiary settings.  Worst, non-tertiary setting national schools are seen as the breeding ground of racial polarization.  Thus, the main objectives of this research is to explore the level of intercultural knowledge that can enhance intercultural awareness among Malaysian secondary school students.  Data was collected using a structured survey questionnaire to elicit responses from Form Four students in one national secondary school in Penang, Malaysia on their level of intercultural knowledge.  The results of this study shows low level of intercultural knowledge among secondary school students and it indicates poor intercultural awareness among them in the contexts of intercultural knowledge.  This suggest that classroom intervention is needed to improve the students’ intercultural knowledge and at the same time improve their intercultural sensitivity towards other cultures.

Experimental Studies for the Evaluation of Non-Ionizing Radiation Levels

International Nuclear Information System (INIS)

Nasr, A.; Ashour, M.

2008-01-01

This article concerns the characteristic studies of non-ionizing; microwave, radiations. The power density levels, frequency ranges, modulation types, and the Fast Fourier Transform (FFT) are discussed. The experimental data are collected from the Egyptian Atomic Energy Authority (EAEA) locations in Nasr city and Anshas. This study has been carried out by Spectrum analyzer (SA) system, which implied radio frequency coaxial cable and horn antenna with height holders. The horn antenna was adjusted to scan all directions for investigating the signal strength. From this study, we obtain two main non-ionizing signals at center frequencies 900, and 1800 MHz, which are exploited by mobile communications networks. During the silence state, the measured maximum power densities levels for both frequencies are 0.553 μ W/cm 2 and 0.0191μW/cm 2 , respectively. While the measured maximum power densities, during alarm (ringing) state, are 98.67μ W/cm 2 and 2.961μ W/cm 2 for considered two frequencies, correspondingly. One can notice that the power densities are multiplied 178 times and 155 times for the same mentioned frequencies in that order. Moreover, these non-ionizing signals are analyzed theoretically and experimentally by utilizing FFT functions to clarify the Amplitude Modulations (AM) ratios and voltage strengths of these signals. Furthermore, the Occupied Band Width (OBW) ratio, and the division from the center frequency of the channel, (δFc) are clarified

Nudging Satellite Altimeter Data Into Quasi-Geostrophic Ocean Models

Science.gov (United States)

Verron, Jacques

1992-05-01

This paper discusses the efficiency of several variants of the nudging technique (derived from the technique of the same name developed by meteorologists) for assimilating altimeter data into numerical ocean models based on quasi-geostrophic formulation. Assimilation experiments are performed with data simulated in the nominal sampling conditions of the Topex-Poseidon satellite mission. Under experimental conditions it is found that nudging on the altimetric sea level is as efficient as nudging on the vorticity (second derivative in space of the dynamic topography), the technique used thus far in studies of this type. The use of altimetric residuals only, instead of the total altimetric sea level signal, is also explored. The critical importance of having an adequate reference mean sea level is largely confirmed. Finally, the possibility of nudging only the signal of sea level tendency (i.e., the successive time differences of the sea level height) is examined. Apart from the barotropic mode, results are not very successful compared with those obtained by assimilating the residuals.

A Study of the Transition Pathways of School Level Scholarship Recipients into Work and Tertiary Education

Science.gov (United States)

Hobden, Sally; Hobden, Paul

2015-01-01

School-level educational interventions targeting learners from low socioeconomic backgrounds often have the long-term goal of enabling access to, and successful completion of tertiary studies. This study tracked the progress of alumni of an educational intervention two or three years post school, in order to investigate their pathways to their…

Examining a participation-focused stroke self-management intervention in a day rehabilitation setting: a quasi-experimental pilot study.

Science.gov (United States)

Lee, Danbi; Fischer, Heidi; Zera, Sarah; Robertson, Rosetta; Hammel, Joy

2017-12-01

Background People with stroke often find discharge from rehabilitation distressing because they do not feel prepared to participate in life roles as they want. A self-management approach can facilitate improvement in confidence and ability to manage post-stroke community living and participation after transitioning into the community. Objective To evaluate the feasibility and effectiveness of the Improving Participation After Stroke Self-management program - Rehab version (IPASS-R) in a day rehabilitation setting. Methods We used a mixed-method non-randomized quasi-experimental design. The IPASS-R program is a six-session group-based intervention led by a trained occupational therapist and lay person with stroke. The program uses an efficacy building approach to support aging adults to maintain active participation in home and community activities post-stroke. Primary outcome measures were the Reintegration to Normal Living Index (RNLI), Stroke Impact Scale (SIS), and Participation Strategies Self-Efficacy Scale. Qualitative feedback was collected post-treatment. Results Seventeen participants with stroke (intervention n = 9; control n = 8) were enrolled across two sites. Non-parametric effect sizes calculated using the Wilcoxon Signed-Rank test revealed larger effects on RNLI and SIS outcomes in the intervention group. The Mann-Whitney U test showed significant differences between the two groups' changes in scores on perceived recovery and strength. Conclusions The result shows that IPASS-R has the potential to be integrated into a day rehabilitation setting with a positive impact on community integration and perceived recovery outcomes. Future study is needed to investigate the IPASS-R with a larger sample size and more rigorous study design.

System Thinking Skills at the Elementary School Level

Science.gov (United States)

Assaraf, Orit Ben-Zvi; Orion, Nir

2010-01-01

This study deals with the development of system thinking skills at the elementary school level. It addresses the question of whether elementary school students can deal with complex systems. The sample included 40 4th grade students from one school in a small town in Israel. The students studied an inquiry-based earth systems curriculum that…

Outline of deaf schools on the level throughout the country : A study on architectural planning for the deaf school Part 1

OpenAIRE

平根, 孝光

1993-01-01

This paper is to make clear in outline of deaf schools on the level throughout the country in 1990s. The factors might supposedly exhibit the characteristics of deaf schools are as follows : 1) In deaf schools which have 4 departments and in which early-age education for such children of no less than 3 years of age is executed, babies, young children, children, and juveniles whose age cover a wide renge from 0 to 21 study in a same school, where great gaps are evidently noticed in such people...

Radiative nucleon capture with quasi-separable potentials

International Nuclear Information System (INIS)

Shubhchintak; Bertulani, C A; Mukhamedzhanov, A M; Kruppa, A T

2016-01-01

We study radiative capture reactions using quasi-separable potentials. This procedure allows an easier treatment of non-local effects that can be extended to three-body problems. Using this technique, we calculate the neutron and proton radiative capture cross sections on 12 C. The results obtained are shown to be in good agreement with the available experimental data. (paper)

Improvement of nursing students' critical thinking skills through problem-based learning in the People's Republic of China: a quasi-experimental study.

Science.gov (United States)

Yuan, Haobin; Kunaviktikul, Wipada; Klunklin, Areewan; Williams, Beverly A

2008-03-01

A quasi-experimental, two-group pretest-post-test design was conducted to examine the effect of problem-based learning on the critical thinking skills of 46 Year 2 undergraduate nursing students in the People's Republic of China. The California Critical Thinking Skills Test Form A, Chinese-Taiwanese version was used as both a pretest and as a post-test for a semester-long nursing course. There was no significant difference in critical thinking skills at pretest, whereas, significant differences in critical thinking skills existed between the problem-based learning and lecture groups at post-test. The problem-based learning students had a significantly greater improvement on the overall California Critical Thinking Skills Test, analysis, and induction subscale scores compared with the lecture students. Problem-based learning fostered nursing students' critical thinking skills.

Health consequences of the US Deferred Action for Childhood Arrivals (DACA immigration programme: a quasi-experimental study

Directory of Open Access Journals (Sweden)

Atheendar S Venkataramani, DrMD

2017-04-01

Full Text Available Summary: Background: The effects of changes in immigration policy on health outcomes among undocumented immigrants are not well known. We aimed to examine the physical and mental health effects of the Deferred Action for Childhood Arrivals (DACA programme, a 2012 US immigration policy that provided renewable work permits and freedom from deportation for a large number of undocumented immigrants. Methods: We did a retrospective, quasi-experimental study using nationally representative, repeated cross-sectional data from the US National Health Interview Survey (NHIS for the period January, 2008, to December, 2015. We included non-citizen, Hispanic adults aged 19–50 years in our analyses. We used a difference-in-differences strategy to compare changes in health outcomes among individuals who met key DACA eligibility criteria (based on age at immigration and at the time of policy implementation before and after programme implementation versus changes in outcomes for individuals who did not meet these criteria. We additionally restricted the sample to individuals who had lived in the USA for at least 5 years and had completed high school or its equivalent, in order to hold fixed two other DACA eligibility criteria. Our primary outcomes were self-reported overall health (measured on a 5 point Likert scale and psychological distress (Kessler 6 [K6] scale, the latter was administered to a random subset of NHIS respondents. Findings: Our final sample contained 14 973 respondents for the self-reported health outcome and 5035 respondents for the K6 outcome. Of these individuals, 3972 in the self-reported health analysis and 1138 in the K6 analysis met the DACA eligibility criteria. Compared with people ineligible for DACA, the introduction of DACA was associated with no significant change among DACA-eligible individuals in terms of self-reported overall health (b=0·056, 95% CI −0·024 to 0·14, p=0·17 or the likelihood of reporting poor or fair

History-Infused Lessons in Introductory Calculus at the Secondary Level: Students' Learning and Perceptions

Science.gov (United States)

Poh, Wei Beng; Dindyal, Jaguthsing

2016-01-01

A history-infused lesson package developed by a team of teachers in a professional learning community was used to teach introductory calculus in a secondary school. First, we report a quasi-experimental design that showed that students in the experimental group performed significantly better than students in the control group. Second, we report on…

Effect of Instruction in Emotional Intelligence Skills on Locus of Control and Academic Self-Efficacy among Junior Secondary School Students in Niger State, Nigeria

Science.gov (United States)

Umaru, Yunusa; Umma, Abdulwahid

2015-01-01

This study investigated the effect of instruction in emotional intelligence Skills on locus of control and academic self-efficacy among junior secondary school students in Niger state, Nigeria. This study employed a quasi-experimental, non-equivalent control group, pre-test - post-test design. The population of this study was 105,034 secondary…

Effect of Programmed Instruction on Students' Attitude towards Structure of the Atom and the Periodic Table among Kenyan Secondary Schools

Science.gov (United States)

Wangila, M. J.; Martin, W.; Ronald, M.

2015-01-01

This study examined the effect of Programmed Instruction on students' attitude towards Structure of the Atom and the Periodic Table (SAPT) among mixed (co-educational) secondary schools of Butere district, Kakamega county, Kenya. The quasi-experimental research design was adopted, using the nonrandomized Solomon four-group as a model. The sample…

BURNOUT SYNDROME IN SCHOOL PRINCIPAL. AN EXPLORATORY STUDY FROM A ONE-DIMENSIONAL APPROACH

Directory of Open Access Journals (Sweden)

Arturo Barraza Macías

2010-10-01

Full Text Available This research aims to: a Specify the descriptive profile Burnout Syndrome who have primary school principal, b Establish the extent to which demographic variables influence the level of burnout syndrome reported by primary school principal, and c determine the relationship between the level of job satisfaction and burnout syndrome reported by primary school principal. The theoretical construction of the research object was based on the approach conceptual one-dimensional and the interactive model explanatory. To achieve the stated objectives,  was performed a study exploratory, correlational, cross and not experimental. For the collection of information was applied Shirom Melamed Burnout Measure of a population of 24 directors of elementary education in the of seven and eight school zones located in the city of Surango. The main results are: 1 .- that primary school managers surveyed present a mild level of burnout, 2 .- that the sociodemographic variables studied did not influence the level and 3 .- the variable job satisfaction have a significant negative correlation with level of burnout syndrome.

Table of members of quasi-bands

International Nuclear Information System (INIS)

Sakai, Mitsuo.

1984-04-01

The probable members of the quasi-bands in even-even nuclei for Z between 6 and 100 are listed in this table. The terms quasi-bands have been introduced in the so-called spherical regions as the counter parts of the collective bands in the deformed regions. In the present compilation, the data for deformed nuclei are classified for convenience under the same titles, Quasi-Ground Band, Quasi-Beta Band and Quasi-Gamma Band, as are used for other nuclear regions. The present edition covers the literature through September, 1983. Fifteen newly discovered nuclides are included. The classification of energy level into quasi-bands is made on the basis of the systematic trend in the data over large groups of nuclei. (Kato, T.)

Implementation of WHO multimodal strategy for improvement of hand hygiene: a quasi-experimental study in a Traditional Chinese Medicine hospital in Xi'an, China.

Science.gov (United States)

Shen, Li; Wang, Xiaoqing; An, Junming; An, Jialu; Zhou, Ning; Sun, Lu; Chen, Hong; Feng, Lin; Han, Jing; Liu, Xiaorong

2017-01-01

Hand hygiene (HH) is an essential component for preventing and controlling of healthcare-associated infection (HAI), whereas compliance with HH among health care workers (HCWs) is frequently poor. This study aimed to assess compliance and correctness with HH before and after the implementation of a multimodal HH improvement strategy launched by the World Health Organization (WHO). A quasi-experimental study design including questionnaire survey generalizing possible factors affecting HH behaviors of HCWs and direct observation method was used to evaluate the effectiveness of WHO multimodal HH strategy in a hospital of Traditional Chinese Medicine. Multimodal HH improvement strategy was drawn up according to the results of questionnaire survey. Compliance and correctness with HH among HCWs were compared before and after intervention. Also HH practices for different indications based on WHO "My Five Moments for Hand Hygiene" were recorded. In total, 553 HCWs participated in the questionnaire survey and multimodal HH improvement strategy was developed based on individual, environment and management levels. A total of 5044 observations in 23 wards were recorded in this investigation. The rate of compliance and correctness with HH improved from 66.27% and 47.75% at baseline to 80.53% and 88.35% after intervention. Doctors seemed to have better compliance with HH after intervention (84.04%) than nurses and other HCWs (81.07% and 69.42%, respectively). When stratified by indication, compliance with HH improved for all indications after intervention ( P  Implementing the WHO multimodal HH strategy can significantly improve HH compliance and correctness among HCWs.

Assessing the Promise of a Supplemental Reading Intervention for At-Risk First Grade Students in a Public School Setting

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Mokhtari, Kouider; Neel, Joanna L.; Kaiser, Forrest; Le, Hong-Hai

2015-01-01

In this exploratory quasi-experimental case study, we assessed the promise of a yearlong supplemental reading intervention with a small pilot group of at-risk first grade readers in an elementary school setting. Using standardized measures of reading proficiency, we found that after 47 hours of one-on-one tutoring instruction, students read…

Report of study meeting on nuclear physics of quasi-elastic scattering

International Nuclear Information System (INIS)

1992-10-01

This meeting was held for three days from June 8 to 10, 1992, as one of the study meetings of Research Center for Nuclear Physics, Osaka University. The lectures were given on spin observables in quasi-elastic scattering, calculation of spin observables in 12 C, 40 Ca(p,n) reaction in quasifree scattering region, present state of quasi-elastic scattering, first results of (p,n) quasifree scattering with the new facility of the RCNP, spin-isospin response function and effect of Δ-hole configuration in finite nuclei, effective polarization of nuclei and observed amount of spin, (p,2p) measurement in the RCNP, quasi-elastic scattering in 2 H, 3 He and 4 He of polarized protons, quasifree Δ formation, 3 He(gamma, pπ ± ) reaction in Δ region, search for isobar components in 3 He by quasifree knockout studies, nonquasi-elastic process in photonuclear reaction, QF and NQF processes in gamma d→π + π - pn, coincidence scattering experiment in quasi-elastic scattering region, exclusive electron scattering of 3 He with full inclusion of final state interaction, quasi-elastic electron scattering and internucleon correlation and 13 other themes. (K.I.)

Playing in School or at Home? An Exploration of the Effects of Context on Educational Game Experience

Science.gov (United States)

De Grove, Frederik; Van Looy, Jan; Neys, Joyce; Jansz, Jeroen

2012-01-01

The goal of this study is to gain insight into the effects of context on educational game experience. Using a quasi-experimental setup, it compares the playing and learning experiences of adolescent players of the awareness-raising game PING in a domestic (N=135) and a school (N=121) context. Results indicate that both gaming (identification,…

The association between education outside the classroom and students’ school motivation

DEFF Research Database (Denmark)

Bølling, Mads; Otte, Camilla Roed; Elsborg, Peter

2018-01-01

The aim of this quasi-experimental intervention study was to investigate the association between primary school students’ (9–13 years) school motivation and regular participation in education outside the classroom (EOtC). School motivation of 311 Danish public students from 24 intervention classes...... and 88 students from seven parallel comparison classes was measured at the start and end of the 2014–2015 school year using the Academic Self-Regulation Questionnaire (SRQA). Exposure to EOtC was monitored by intervention and comparison teachers. Multilevel analyses showed that regular exposure to EOt......C was associated with improvement in intrinsic motivation and was moderated by prior intrinsic motivation in favor of students with higher prior intrinsic motivation. Results were independent of gender and socio-economic-status....

Experimental study of dynamic behaviors and routes to chaos in DC-DC boost converters

International Nuclear Information System (INIS)

Cafagna, D.; Grassi, G.

2005-01-01

This paper illustrates an experimental study of a current-programmed DC-DC boost converter, with the aim of investigating possible pathways through which the converter may enter chaos. In particular, based on experimental measurements, it is shown that variations of input voltage and reference current can generate periodic, subharmonic, quasi-periodic and chaotic behaviors

Charge and statistics of quantum Hall quasi-particles - a numerical study of mean values and fluctuations

International Nuclear Information System (INIS)

Kjoensberg, H.; Leinaas, J.M.

1999-01-01

We present Monte Carlo studies of charge expectation values and charge fluctuations for quasi-particles in the quantum Hall system. We have studied the Laughlin wave functions for quasi-hole and quasi-electron, and also Jain's definition of the quasi-electron wave function. The considered systems consist of from 50 to 200 electrons, and the filling fraction is 1/3. For all quasi-particles our calculations reproduce well the expected values of charge; ((-1)/(3)) times the electron charge for the quasi-hole, and 1/3 for the quasi-electron. Regarding fluctuations in the charge, our results for the quasi-hole and Jain quasi-electron are consistent with the expected value zero in the bulk of the system, but for the Laughlin quasi-electron we find small, but significant, deviations from zero throughout the whole electron droplet. We also present Berry phase calculations of charge and statistics parameter for the Jain quasi-electron, calculations which supplement earlier studies for the Laughlin quasi-particles. We find that the statistics parameter, calculated as a function of distance, is more well behaved for the Jain quasi-electron than it is for the Laughlin quasi-electron. However, the sign of the parameter is opposite of what is expected from qualitative arguments

Oral zinc supplementation for children with acute diarrhoea: a quasi-experimental study.

Science.gov (United States)

Dalfa, Rola Abu; El Aish, Khaled I Abu; El Raai, Mohamed; El Gazaly, Nermeen; Shatat, Ahmed

2018-02-21

Diarrhoea causes 15% of under-5 mortality in developing countries. Zinc (Zn) stores in the body are known to be depleted during acute diarrhoea. The aim of this study was to evaluate the efficacy of Zn given with standard treatment to children with acute or moderate diarrhoea. In this quasi-unmasked, parallel-group study, we enrolled children with diarrhoea at El-Dorra Paediatric Hospital, Gaza Strip, occupied Palestinian territory. Inclusion criteria were children with more than three unformed stools in the preceding 24 h, duration of diarrhoea up to 72 h, and ability to accept oral fluids or feeds. Recruited children were assigned equally to either oral rehydration salts (control group) or oral rehydration salts plus Zn sulphate (Zn group; 10 mg for children younger than 6 months; 20 mg for children aged 6 months and older). All treatments were taken orally for 14 days. Primary outcomes were duration and frequency of diarrhoea. Secondary outcomes included changes in bodyweight, drugs side-effects, and episodes of any or severe dehydration. Data were analysed with SPSS. Outcome measures were compared with the Mann-Whitney U-test, student's t test, odds ratio, or χ 2 test. The study was approved by the ministry of health and the Helsinki Committee in the Gaza Strip. Parents of the children provided verbally informed consent before participation. We enrolled 140 children (aged 1-120 months). Duration of diarrhoea in the Zn group was shorter than in the control group (2·34 days in the Zn group vs 7·20 days in the control group; pZinc supplementation added to standard treatment with oral rehydration salts was effective and resulted in good treatment of diarrhoea. None. Copyright © 2018 Elsevier Ltd. All rights reserved.

Infusing the School Counseling Internship with a Global Perspective to Promote Ego Development, Moral Reasoning, and Ethnocultural Empathy: A Deliberate Psychological Education

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Robertson, Derek Lane

2013-01-01

This study utilized a quasi-experimental, pre and posttest, comparison group design to determine the effects of a semester long deliberate psychological education (DPE), infused with a global perspective to promote ego development, moral reasoning and ethnocultural empathy in an intervention group composed of school counseling interns. The…

Impact of an outdoor smoking ban at secondary schools on cigarettes, e-cigarettes and water pipe use among adolescents: An 18-Month Follow-Up

OpenAIRE

Rozema, A.D.; Hiemstra, J.M.; Mathijssen, J.J.P.; Jansen, M.W.J.; Van Oers, J.A.M.

2018-01-01

The effectiveness of outdoor smoking bans on smoking behavior among adolescents remains inconclusive. This study evaluates the long-term impact of outdoor school ground smoking bans among adolescents at secondary schools on the use of conventional cigarettes, e-cigarettes (with/without nicotine) and water pipes. Outdoor smoking bans at 19 Dutch secondary schools were evaluated using a quasi-experimental design. Data on 7733 adolescents were obtained at baseline, and at 6 and 18-month follow-u...

Community based intervention to prevent domestic violence against women in the reproductive age in Northwestern Ethiopia: a protocol for quasi-experimental study.

Science.gov (United States)

Semahegn, Agumasie; Torpey, Kwasi; Manu, Abubakar; Assefa, Nega; Ankomah, Augustine

2017-11-21

Violence against women is a well understood devastating global pandemic, and human right violation. One in three women experienced intimate partner violence worldwide. In Ethiopia, the level of domestic violence against women is one of the highest in the world. However, Ethiopia is signatory for various conventions and incorporated in legal frameworks. Nevertheless, effective implementation of the existing policy documents, and engaging different stakeholders is very limited. Therefore, we aimed to pilot feasibility of implementing available research evidence and policy documents at community level to prevent domestic violence against women in Awi zone, northwestern Ethiopia. A community-based quasi-experimental study design will be employed using mixed method. Multistage stratified systematic sampling and purposive sampling will be used to recruit quantitative and qualitative study participants, respectively. A total of 1,269 women will be participated in the intervention, active comparator and control groups. Pre and post-test quantitative data will be collected using face-to-face interview. Qualitative data will be collected through in-depth, key informant interview and focus group discussions. advocacy meeting will be held to persuade local politicians and sustain the implementation of community based intervention to prevent domestic violence against women. Community representatives will be trained to enhance peer education to promote community awareness and engage stakeholders to transform the traditional gender norm within local context. Awareness creation and husband involvement will be made through integrating the intervention with community health extension program. Only husband involvement will not be promoted in the active comparator to test the role of husband involvement on the domestic violence prevention activities. Intervention progress will be monitored regularly. Gathered data will be entered in Epidata and exported to SPSS (23.0) software for

Effects of demand-side incentives in improving the utilisation of delivery services in Oyam District in northern Uganda: a quasi-experimental study.

Science.gov (United States)

Massavon, William; Wilunda, Calistus; Nannini, Maria; Majwala, Robert Kaos; Agaro, Caroline; De Vivo, Emanuela; Lochoro, Peter; Putoto, Giovanni; Criel, Bart

2017-12-19

We evaluated the effects and financial costs of two interventions with respect to utilisation of institutional deliveries and other maternal health services in Oyam District in Uganda. We conducted a quasi-experimental study involving intervention and comparable/control sub-counties in Oyam District for 12 months (January-December 2014). Participants were women receiving antenatal care, delivery and postnatal care services. We evaluated two interventions: the provision of (1) transport vouchers to women receiving antenatal care and delivering at two health centres (level II) in Acaba sub-county, and (2) baby kits to women who delivered at Ngai Health Centre (level III) in Ngai sub-county. The study outcomes included service coverage of institutional deliveries, four antenatal care visits, postnatal care, and the percentage of women 'bypassing' maternal health services inside their resident sub-counties. We calculated the effect of each intervention on study outcomes using the difference in differences analysis. We calculated the cost per institutional delivery and the cost per unit increment in institutional deliveries for each intervention. Overall, transport vouchers had greater effects on all four outcomes, whereas baby kits mainly influenced institutional deliveries. The absolute increase in institutional deliveries attributable to vouchers was 42.9%; the equivalent for baby kits was 30.0%. Additionally, transport vouchers increased the coverage of four antenatal care visits and postnatal care service coverage by 60.0% and 49.2%, respectively. 'Bypassing' was mainly related to transport vouchers and ranged from 7.2% for postnatal care to 11.9% for deliveries. The financial cost of institutional delivery was US$9.4 per transport voucher provided, and US$10.5 per baby kit. The incremental cost per unit increment in institutional deliveries in the transport-voucher system was US$15.9; the equivalent for the baby kit was US$30.6. The transport voucher scheme

The effects of small-scale, homelike facilities for older people with dementia on residents, family caregivers and staff: design of a longitudinal, quasi-experimental study.

Science.gov (United States)

Verbeek, Hilde; van Rossum, Erik; Zwakhalen, Sandra M G; Ambergen, Ton; Kempen, Gertrudis I J M; Hamers, Jan P H

2009-01-20

Small-scale and homelike facilities for older people with dementia are rising in current dementia care. In these facilities, a small number of residents live together and form a household with staff. Normal, daily life and social participation are emphasized. It is expected that these facilities improve residents' quality of life. Moreover, it may have a positive influence on staff's job satisfaction and families involvement and satisfaction with care. However, effects of these small-scale and homelike facilities have hardly been investigated. Since the number of people with dementia increases, and institutional long-term care is more and more organized in small-scale and homelike facilities, more research into effects is necessary. This paper presents the design of a study investigating effects of small-scale living facilities in the Netherlands on residents, family caregivers and nursing staff. A longitudinal, quasi-experimental study is carried out, in which 2 dementia care settings are compared: small-scale living facilities and regular psychogeriatric wards in traditional nursing homes. Data is collected from residents, their family caregivers and nursing staff at baseline and after 6 and 12 months of follow-up. Approximately 2 weeks prior to baseline measurement, residents are screened on cognition and activities of daily living (ADL). Based on this screening profile, residents in psychogeriatric wards are matched to residents living in small-scale living facilities. The primary outcome measure for residents is quality of life. In addition, neuropsychiatric symptoms, depressive symptoms and social engagement are assessed. Involvement with care, perceived burden and satisfaction with care provision are primary outcome variables for family caregivers. The primary outcomes for nursing staff are job satisfaction and motivation. Furthermore, job characteristics social support, autonomy and workload are measured. A process evaluation is performed to investigate to

Implementation of PATHS through dutch municipal health services: A quasi-experiment

NARCIS (Netherlands)

Goossens, F.X.; Gooren, E.M.J.C.; Castro, B.O.de; Overveld, K.W.van; Buijs, G.J.; Monshouwer, K.; Onrust, S.A.; Paulussen, T.G.W.M.

2012-01-01

Only a limited number of effectiveness studies have been performed to study the benefits of efficacious behavior problems prevention programs for children when implemented through national health service systems. This study uses a quasi-experimental design to test the effectiveness of the

Relations between the school physical environment and school social capital with student physical activity levels.

Science.gov (United States)

Button, Brenton; Trites, Stephen; Janssen, Ian

2013-12-17

The physical and social environments at schools are related to students' moderate-to-vigorous physical activity (MVPA) levels. The purpose of this study was to explore the interactive effects of the school physical environment and school social capital on the MVPA of students while at school. Data from 18,875 grade 6-10 students from 331 schools who participated in the 2009/10 Canadian Health Behaviour in School-Aged Children survey were analyzed using multi-level regression. Students answered questions on the amount of time they spend in MVPA at school and on their school's social capital. Administrator reports were used to create a physical activity related physical environment score. The school physical environment score was positively associated with student MVPA at school (β = 0.040, p < .005). The association between the school social capital and MVPA was also positive (β = 0.074, p < .001). The difference in physical environments equated to about 20 minutes/week of MVPA for students attending schools with the lowest number of physical environment features and about 40 minutes/week for students attending schools with the lowest school social capital scores by comparison to students attending schools with the highest scores. The findings suggest that school social capital may be a more important factor in increasing students MVPA than the school physical environment. The results of this study may help inform interventions aimed at increasing student physical activity levels.