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21.
Janina Burschka Dr. Peter Kuhn PD Dr. Uwe Menge Prof. Dr. Patrick Oschmann 《Sportwissenschaft》2013,43(3):181-196
This article examines the content and methodology of studies on Tai Chi as a sport in health care. We investigate the concept behind the rather simple name “Tai Chi,” concluding that this concept is manifold and highly variable. How did researchers deal with this variability when studying the effects of Tai Chi as a health-care intervention? We then explore how scientific research on Tai Chi has been conducted to date and draw the interim conclusion that the variability was barely taken into consideration. Our analysis of seven Tai Chi interventions reveals that two interventions referred to as Tai Chi may differ considerably in their content. The variability poses difficulty in repeating the intervention and drawing causal inferences. This problem is discussed in the current literature under the term “complexity in health-care interventions.” On the basis of a summary of this debate, we discuss the challenge of researching Tai Chi from a complex perspective—with the aim of achieving solid results that can be repeated. 相似文献
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Sian E. Slawson Paul P. Conway Jodi Cossor Nandini Chakravorti Andrew A. West 《Journal of sports sciences》2013,31(5):468-478
Abstract Work presented in this paper provides a methodology for categorising swimming start performance based on peak force production on the main block and footrest components of the Omega OSB11 starting block. A total of 46 elite British swimmers were tested, producing over 1000 start trials. Overwater cameras were synchronised to a specifically designed start block that allowed the measurement of force production via two sets of four, tri-axis, force transducers; one set in the main block and one in the footrest. Data were then analysed, segregating trials for gender. Each start was categorised, with respect to the peak force production in horizontal and vertical components, into one of nine categories. Three performance indicators, i.e. block time, take-off velocity and distance of entry, were used to assess whether differences in performance could be correlated with these categories. Results from these data suggest that swimmers generating higher than average peak forces were more likely to produce a better overall start performance than those who produced forces lower than the average, for this population of athletes. 相似文献
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To date, a comprehensive review of supervisory relationship measures has yet to be published. In this article, the authors explore conceptualizations of the supervisory relationship, describe and critique 11 measures, provide recommendations for researchers and practitioners when selecting measures, and offer suggestions regarding future measure development. 相似文献
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Many large‐scale assessments are designed to yield two or more scores for an individual by administering multiple sections measuring different but related skills. Multidimensional tests, or more specifically, simple structured tests, such as these rely on multiple multiple‐choice and/or constructed responses sections of items to generate multiple scores. In the current article, we propose an extension of the hierarchical rater model (HRM) to be applied with simple structured tests with constructed response items. In addition to modeling the appropriate trait structure, the multidimensional HRM (M‐HRM) presented here also accounts for rater severity bias and rater variability or inconsistency. We introduce the model formulation, test parameter recovery with a focus on latent traits, and compare the M‐HRM to other scoring approaches (unidimensional HRMs and a traditional multidimensional item response theory model) using simulated and empirical data. Results show more precise scores under the M‐HRM, with a major improvement in scores when incorporating rater effects versus ignoring them in the traditional multidimensional item response theory model. 相似文献
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Elizabeth B. Rush Jodi A. Quas Ilona S. Yim Mariya Nikolayev Steven E. Clark Rakel P. Larson 《Child development》2014,85(3):1292-1305
Few studies have investigated how stress affects eyewitness identification capabilities across development, and no studies have investigated whether retrieval context in conjunction with stress affects accuracy. In this study, one hundred fifty‐nine 7‐ to 8‐ and 12‐ to 14‐year‐olds completed a high‐ or low‐stress laboratory protocol during which they interacted with a confederate. Two weeks later, they attempted to identify the confederate in a photographic lineup. The lineup administrator behaved in either a supportive or a nonsupportive manner. Participants who experienced the high‐stress event and were questioned by a supportive interviewer were most accurate in rejecting target‐absent lineups. Results have implications for debates about effects of stress on eyewitness recall, how best to elicit accurate identifications in children, and developmental changes in episodic mnemonic processes. 相似文献
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Abstract This two‐semester study compared two designs of coursework and field experience in a teacher preparation program. Participants were 62 preservice teachers. Data were collected from their observations of mentor teachers’ instruction and their analyses of these observations. Data were analyzed by constant comparative analysis and analytic statistics. The study found that the design, organized to bring the field experience into the methods course, enhanced preservice teacher abilities to understand and explain instructional observations. The results have implications for the integration of methods coursework and field experience, likely across content areas. 相似文献
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