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AbstractSeveral researchers have demonstrated that an external focus of attention (about movement’s effects) during movement execution allowed better performances and learning of various motor tasks than an internal focus of attention (about movement itself). However, attentional focus effects have not been studied in tasks requiring explosive actions preceded by fast reaction time to a signal, such as a sprint start. We hypothesised that the beneficial effect of external focus of attention would be observed in the different stages of the sprint start (i.e. reaction time, block clearance and running) for both expert and novice sprinters. Novice and expert sprinters performed sprint starts followed by a 10 m sprint under three conditions: external focus instructions; internal focus instructions; and neutral instructions. The reaction time and the running time were significantly shorter in the external focus condition than in the internal focus condition, for both expert and novice participants. These results confirm the beneficial effect of an external focus of attention on the speed of movement execution. Moreover, they revealed that attentional focus influences movement preparation. Several hypotheses are proposed to account for these results, with reference to the processes that could be responsible for the observed effects. 相似文献
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Previous research suggests that people encode gender starting in childhood. The present research asked whether gender diverse children (i.e., children whose gender identity or expression differs from that expected based on assigned sex) encode gender. Results showed that 3- to 5-year-old gender diverse participants (N = 71), siblings of gender diverse children (N = 52), and gender conforming controls (N = 69) did not significantly differ in degree of gender encoding. These results converge with prior research to suggest that gender diverse children process gender in ways that do not differ from gender conforming children, and provide further evidence that gender encoding may be a common aspect of person perception in societies that support a binary view of gender. 相似文献
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Yılmaz Zuhal Gülbağcı Dede Hande Sears Ruthmae Yıldız Nielsen Selin 《Educational Studies in Mathematics》2021,108(1-2):307-331
Educational Studies in Mathematics - The COVID-19 pandemic is an unprecedented situation that influenced all aspects of society, including education. Millions of students found themselves adjusting... 相似文献
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Ivan Crozier Patricia Fara Jon Hodge Brendan Kitts Robin Knight Sverre Myhra David Oldroyd Elizabeth A. Wilson Rosemary Robins Stephen Dovers John Forge Harshi Gunawardena Jenny Tannoch-Bland Loet Leydesdorff David Oldroyd David Oldroyd David Oldroyd Nicolas Rasmussen Greg Restall Helaine Selin Michael Shortland E. E. Sleinis Fiona Solomon Scott McQuire Maurice Crosland David Farrier Roslynn Haynes Sverre Myhra Colin Russell Libby Robin Karin Garrety Stephen Gaukroger Stephen Ames Wendy Varney Vojislav Bozickovic Phil Dowe 《Metascience》1996,5(2):71-192
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Power differences are observed in children's early relationships, yet little is known about how children conceptualize social power. Study 1 recruited adults (n = 35) to assess the validity of a series of vignettes to measure five dimensions of social power. Using these vignettes, Study 2 (149 three‐ to nine‐year‐olds, 42 adults) and Study 3 (86 three‐ to nine‐year‐olds, 22 adults) showed that children visiting a science museum at a middle class university town are sensitive to several dimensions of social power from a young age; however, an adult‐like breadth of power concepts does not develop until 7–9 years. Children understand social power whether the powerful character is malevolent or benevolent, though malevolent power is easier to detect for children and adults. 相似文献
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Douglas E. Mitchell Selin Yildiz Michael Batie 《Community College Journal of Research & Practice》2013,37(8):620-644
Community colleges employ more than one-third of the nation's higher education faculty. Nevertheless, the labor market through which faculty are recruited, selected, hired, evaluated and retained or replaced is one of the least understood aspects of these institutions. Functional management and effective policy both require a clear understanding of the workplace dynamics and employment dilemmas associated with this labor market. This article begins by recognizing that the 21st century economy is being transformed by large scale social, political, and technological developments—developments often referred to as the emergence of a new economy. This new economy is transforming the nature of work and the character of worker-employer relations. Four core ideas in the new economy literature are developed to show how they are creating fundamental labor market dilemmas for community colleges. The concepts are (a) information age technology, (b) globalization, (c) neo-institutional theories of organization, and (d) work spatialization. Analysis of these concepts shows how the transformation of work and of workplace relationships produced by the new economy is creating five troublesome dilemmas for community college management, policy, and research. These dilemmas are examined to build theory and frame policy issues for research and action. The dilemmas involve distinguishing work spatialization from secondary labor market status, separating institutional from bureaucratic forms of control, identifying symbolic and substantive faculty work roles, clarifying managerial control structures and roles, and identifying the career pipelines that bring individuals into this occupation. Responding to these dilemmas shapes college management, frames higher education policy issues, and defines a research agenda for anyone interested in understanding and improving community college performance. 相似文献
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Abstract The recent Surgeon General's report (U.S. Department of Health and Human Services, 1996) promotes regular physical activity to enhance health. A possible mechanism by which physical activity contributes to a healthy life span is via enhanced antioxidant status. The purpose of this paper is to summarize findings from human studies on life span, health, antioxidants, and the effectiveness of physical activity as a natural antioxidant booster. Epidemiological studies concur that some antioxidants are inversely related to mortality. A single bout of exercise elevates some antioxidant enzyme and coenzyme activities. Regular physical activity enhances some antioxidants; however, strenuous exercise may diminish others. Results generally show that antioxidants play a mediating role in the way in which physical activity positively affects a healthy life span. 相似文献
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