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961.
Drawing on data generated by a two-year ethnographic study in a high security Spanish prison, this article explores the multiple meanings given to the social practices of sport and physical activity. We provide details of the following key themes that emerged from the analysis: (a) escaping time; (b) perceived therapeutic benefits; (c) social control; (d) gendered dimensions; and (e) performing masculinity. The findings suggest that a diverse and contradictory set of meanings are associated with sport and physical activity within this particular prison culture, and that the performance of specific kinds of masculinity is both a process and product that shapes the construction of experience in powerful ways. 相似文献
962.
Diane L. Gill Erin J. Reifsteck Melanie M. Adams Ya-Ting Shang 《Measurement in physical education and exercise science》2013,17(4):159-166
Despite the clear relationship between physical activity and quality of life, few sound, relevant quality of life measures exist. Gill and colleagues developed a 32-item quality of life survey, and provided initial psychometric evidence. This study further examined that quality of life survey in comparison with the widely used short form (SF-36) health survey. Participants (n = 446) completed the quality of life survey, short form (36) health survey, World Health Organization quality of life measure, satisfaction with life scale, and the Godin physical activity measure. All quality of life survey scales (emotional, social, spiritual, physical, activities of daily living, cognitive, integrated) were internally consistent (alpha .79–.95) and test–retest correlations ranged from .68 to .82. The SF-36 had similar internal consistency, slightly lower test–retest correlations, and weaker relationships with satisfaction with life scale. Quality of life survey scales correlated with matching SF-36 and World Health Organization quality of life measure subscales supporting convergent validity. The quality of life survey reflects positive health models better than the SF-36, and is more appropriate for research and programs that focus on physical activity and health promotion. 相似文献
963.
Alternating current (AC) dielectrophoresis (DEP) experiments for biological particles in microdevices are typically done at a fixed frequency. Reconstructing the DEP response curve from static frequency experiments is laborious, but essential to ascertain differences in dielectric properties of biological particles. Our lab explored the concept of sweeping the frequency as a function of time to rapidly determine the DEP response curve from fewer experiments. For the purpose of determining an ideal sweep rate, homogeneous 6.08 μm polystyrene (PS) beads were used as a model system. Translatability of the sweep rate approach to ∼7 μm red blood cells (RBC) was then verified. An Au/Ti quadrapole electrode microfluidic device was used to separately subject particles and cells to 10Vpp AC electric fields at frequencies ranging from 0.010 to 2.0 MHz over sweep rates from 0.00080 to 0.17 MHz/s. PS beads exhibited negative DEP assembly over the frequencies explored due to Maxwell-Wagner interfacial polarizations. Results demonstrate that frequency sweep rates must be slower than particle polarization timescales to achieve reliable incremental polarizations; sweep rates near 0.00080 MHz/s yielded DEP behaviors very consistent with static frequency DEP responses for both PS beads and RBCs. 相似文献
964.
Abstract Opportunities for ball passing in water-polo may be brief and the decision to pass only informed by minimal visual input. Since researchers using point light displays have shown that the walking or running gait of familiars can be identified, water-polo players may have the ability to recognize team-mates from their swimming gait. To test this hypothesis, members of a water-polo team and a competition swim team viewed two randomized sets of video clips, each less than one second long, of swimmers from both teams sprinting freestyle past a fixed camera. The arm stroke clip sequence showed only the upper body, and the kick sequence showed only the lower body. After viewing each video clip, observers rated their level of certainty as to whether the swimmer presented was a team-mate or not. Discrimination was significantly above chance in both groups. Water-polo players were better able to identify team-mates from their kick, whereas swimmers were better able to do so by viewing arm stroke. Our results suggest that, as with walking and running gait, small amounts of visual information about swimmers can be used for recognition, and so raise the possibility that specific training may be able to improve team-mate classification in water-polo, particularly in newly formed teams. 相似文献
965.
Raymond T. Stefani 《Journal of sports sciences》2013,31(12):1329-1339
Abstract A uniform measure of the gender-related differential performance of female and male Olympic and World champions is proposed: relative power output applied to the environment. Laws of physics are employed to derive equations for estimating relative power output. In previous controlled laboratory studies, equally trained male and female athletes were shown to have a relative power output not significantly different from relative lean body mass. As to the estimated power output for 32 Olympic and World championship events contested between 1976 and 2004, eight in running, four in speed skating, three in jumping, twelve in swimming and five in rowing: 100% of the 32 event mean percentage differences in power output and 96% of the 411 event percentage differences in power output are within one standard deviation of the appropriate lean body mass percentage difference, consistent with equality of training. For 1952 – 1972, significantly higher percentage differences in power output are estimated in running and swimming compared with 1976 – 2004, consistent with women being less well trained than men during that earlier period. It is noted that efforts in recent years to provide equality of opportunity for female athletes coincide with equalization of estimated relative power output in competition with the relative lean body mass. 相似文献
966.
Iain Adams 《国际体育史杂志》2013,30(11-12):1395-1415
Historians know that any mention of football and World War I will involve discussions of the Christmas truces of 1914 and the mythical football match between British and German troops. Many British soldiers denied that any truce had occurred let alone a football match. However, while there is indisputable evidence of truces, triangulating proof of football has been elusive. In this paper, a case study of the British 2/Argylls and the German 133/Saxons is developed. The underlying reasons behind the truce are discussed and why some combatants, in the short break from trying to kill each other, probably played football, even though certainly not as the formal match of popular imagination. It is argued that the truce was a result of unique circumstances and was not an overwhelmingly inspirational moment for the majority of troops involved; they all returned to the fighting. Most participants on both sides of the truce probably regarded it as an unexpected holiday and some availed themselves of the opportunity to play their favourite game. The paper concludes by examining recent commemorative events of Christmas 1914 and how they may have contributed to the myth of ‘The Football Match’. 相似文献
967.
The incorporation of self- and peer-assessment and feedback has significant potential as a pedagogical strategy to promote deep learning in project based coursework. This study examined the impact of a deeper approach to learning on pre-service teachers’ critical thinking and metacognitive skills. It also examined the impact on student learning outcomes within a project based module with a significant design element. Forty-seven students participated in the pilot of an online peer feedback system. Results suggest that the quality of students’ reflections through peer feedback and overall satisfaction with the module remained high despite students’ citing a preference for instructor feedback. The data also indicate that the incorporation of self- and peer-assessment and feedback resulted in higher quality learning outcomes and enhanced critical thinking skills. 相似文献
968.
Robert H. Stupnisky Raymond P. Perry Nathan C. Hall Frédéric Guay 《Contemporary educational psychology》2012
The aim of the present study was to examine the intraindividual level and instability of perceived academic control (PC) among first-year college students, and their predictive effects on academic achievement. Two studies were conducted measuring situational (state) PC on different schedules: Study 1 (N = 242) five times over a 6-month period and Study 2 (N = 80) daily over a 2-week period. Consistent across both studies were confirmatory factor analyses and structural equation models demonstrating significant PC instability, as well as negative correlations between intraindividual PC levels (average across measurements) and instability (standard deviation across measurements). Also, in both studies PC level positively predicted subsequent academic achievement, although no significant PC instability first-order effects were found. Both studies revealed a PC level by instability interaction, as students with high-unstable PC typically received poorer grades than high-stable PC students. Study findings highlight the importance of considering both PC level and instability, and identify a previously unknown group of first-year college students at-risk of under-achieving academically – students with high-unstable perceived control. 相似文献
969.
Frank Niklas Cuc Nguyen Daniel S. Cloney Collette Tayler Raymond Adams 《Learning Environments Research》2016,19(2):181-202
Favourable home learning environments (HLEs) support children’s literacy, numeracy and social development. In large-scale research, HLE is typically measured by self-report survey, but there is little consistency between studies and many different items and latent constructs are observed. Little is known about the stability of these items and constructs over time when used in either longitudinal research or studies with children with a wide range of ages. A review of the literature shows commonalities and differences between approaches in research on HLE. When we tested the psychometric properties of a short-form measure of HLE with a Rasch item-response-model using longitudinal data from over 1600 Australian families, there was support for two dimensions of HLE—formal and informal learning frequency. We found that this measure was stable over the transitional period from pre-K to school as well as between gender and family language background. There were small but significant associations between the HLE measures and cognitive and behavioural developmental outcomes. We recommend that other measures of HLE could be similarly validated to assess their suitability for use in longitudinal research on learning environments. Recommendations are made for the future development of measures of broader constructs of the HLE. 相似文献
970.