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Darren Veness Stephen David Patterson Owen Jeffries 《Journal of sports sciences》2017,35(24):2461-2467
This study investigated the effects of a mentally fatiguing test on physical tasks among elite cricketers. In a cross-over design, 10 elite male cricket players from a professional club performed a cricket run-two test, a Batak Lite reaction time test and a Yo-Yo-Intermittent Recovery Level 1 (Yo-Yo-IR1) test, providing a rating of perceived exertion (RPE) after completing a 30-min Stroop test (mental fatigue condition) or 30-min control condition. Perceived fatigue was assessed before and after the two conditions and motivation was measured before testing. There were post-treatment differences in the perception of mental fatigue (P < 0.001; d = ?7.82, 95% CIs = ?9.05–6.66; most likely). Cricket run-two (P = 0.002; d = ?0.51, 95% CIs = ?0.72–0.30; very likely), Yo-Yo-IR1 distance (P = 0.023; d = 0.39, 95% CIs = 0.14–0.64; likely) and RPE (P = 0.001; d = ?1.82, 95% CIs = ?2.49–1.14; most likely) were negatively affected by mental fatigue. The Batak Lite test was not affected (P = 0.137), yet a moderate (d = 0.41, 95% CIs = ?0.05–0.87) change was likely. Mental fatigue, induced by an app-based Stroop test, negatively affected cricket-relevant performance. 相似文献
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Helen Jeffries Martin Stanisstreet Edward Boyes 《Research in Science & Technological Education》2013,31(2):205-221
The prevalence of the ideas of Year I undergraduate biology students about the consequences, causes and cures of the 'greenhouse effect' was determined using a closed-form questionnaire, and the results compared with a parallel study undertaken nearly 10 years ago. Many of the students in the present study were unaware of the potential effect of global warming on the distribution of crop pests, or that ground level ozone acts as a 'greenhouse gas'. Prevalent misconceptions were that global warming is caused by increased penetration of solar radiation, that it is connected with holes in the ozone layer, that it would result in increased skin cancer, and that use of unleaded petrol would reduce it. There appeared to be a general conflation of thinking about global warming and ozone layer depletion. Despite an increased certainty about the existence and effects of global warming among experts, the results are broadly similar to, and certainly no better than, those obtained with an equivalent group of students in a previous study, suggesting that despite media publicity and inclusion of the issue of global warming in the formal curriculum, insecure knowledge and misconceptions persist. 相似文献
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Frank C. Bandiera William L. Jeffries IV Michael Reece Debby Herbenick 《Sex education》2013,13(4):451-463
Introduction In Florida, a state that consistently leads the nation in adverse sexual health outcomes among adolescents, numerous demographic and socio‐cultural differences exist across the North, Central, and South regions. However, little is known about regional differences in sexuality education and beliefs among teachers. Methodology Using a mail‐based survey of 462 teachers, we examined regional differences in parental consent requirements, abstinence instruction, student language barriers, availability of Spanish curricula, teacher beliefs regarding the dissemination of accurate safer sex information, and missing data. t‐tests and multivariate logistic regression analyses were conducted. Results North Floridian teachers taught more abstinence than those in Central and South Florida. Additionally, they had fewer students with language barriers, offered less Spanish curricula, and, in general, possessed less favorable attitudes toward presenting accurate safer sex information. However, South Floridian teachers were most likely to report parental consent requirements in their schools. These findings largely remained in multivariate analyses. Conclusions The present study identified several noteworthy regional differences in sexuality education in Florida. Recommendations are given for developing and implementing programs that account for these differences within the state. 相似文献
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AbstractThe aim of this article is to discuss the dynamics of gang involvement by considering the social reproduction perspective and resistance theory literature and by examining general perceptions of learners and adults who regularly experience gang violence. In a study utilising quantitative and qualitative design, a questionnaire was administered to 360 Grade 6 learners in low socio-economic areas in Western Cape, South Africa. Interviews with educators and two experts in the field of gang involvement were conducted. In contrast with the current trend in literature, the participants made no distinction between gangs as marginalised individuals and gangs as deviant subcultures. This may be ascribed to the current high prevalence of violence which is associated with gangs in Western Cape. It was found that, while learners express their fear of gangs, some identify with and idealise gang life. 相似文献
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This article, theoretically constructed on Gramsci's notion of cultural hegemony, explores the use of Black female hair as a cultural signifier in two media texts, specifically Adrienne Kennedy's play, Funnyhouse of a Negro, and Chris Rock's documentary, Good Hair, in specific media texts. Analysis of the verbal and visual rhetoric regarding a Black female aesthetic revealed associated themes of generational family influences and identity formation. 相似文献
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Vignettes have long been used as a tool to model, teach, and research behavior and understanding as well as to stimulate discussion and problem solving in learning situations. The growing body of research on vignettes as an instructional and assessment tool to enhance recognition, recall, and transfer of subject matter knowledge suggests that the effectiveness of vignettes is due in part to its use as a scaffolding tool during instruction. This article summarizes an analysis of the effects of vignette instruction on vignette quiz performance in three sections of a blended graduate educational psychology course. Eight instructional vignettes administered to two sections and eight traditional scaffolding activities completed by the third section represented the only difference in the intervention. Study results suggest that vignette instruction provides efficient near-transfer opportunities and richer scaffolding experiences on student mastery of subject matter than does instruction without vignettes, regardless of whether the scaffolding is conducted in class or online or whether the vignette tasks involve solving a problem or evaluating a solution to a problem in a hypothetical teaching situation. 相似文献
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The growing body of research on the use of vignettes in teacher education courses suggests that vignette-based instruction and assessment tasks may represent a viable alternative to traditional forms of scaffolded instruction and reflective essays following classroom observations, thereby creating a bridge between college and K–12 classrooms for teacher candidates. In this study, the authors compare the effectiveness of vignette instruction and assessment tasks with teacher observation-reflections on subject matter mastery in two sections of an online graduate educational psychology course. One section completed vignette assessment tasks while a second section wrote reflective essays following K–12 classroom observations. Both sections also completed a cumulative posttest (ten forced-choice items, a vignette task, and a video reflection task). Results confirmed the null hypothesis that there would be no significant differences in mastery of subject matter across the two groups, extending the effective application of the vignette as an alternative to reflective essays following classroom observations. 相似文献