Establishing reliability of biomechanical data using univariate and multivariate approaches     

M A Looney  S L Smith  S Srinivasan 《Research quarterly for exercise and sport》1990,61(2):154-161

The purpose of this study was to use generalizability theory with both univariate and multivariate approaches to examine reliability of total body center of mass (CM) values calculated from cinematographical data. Twenty-eight college-aged male volunteers were filmed by a LOCAM camera at 100 fps while performing the basic locomotion skill of walking. Film analysis was conducted on each subject using six frames of film depicting a one-stride walking cycle consisting of right heel strike, right foot flat, left toe-off, left heel strike, left foot flat, and right toe-off. Nineteen segmental endpoints and a reference point were digitized by three experienced plotters. The digitizing sequence was replicated three times by each plotter. A FORTRAN program calculated nine CM values (three plotters by three repetitions) for each subject filmed in each of the six positions of the stride. The x- and y-coordinates of the CM values were the dependent variables analyzed by fully crossed 3-way univariate and multivariate ANOVAs (subjects by plotters by repetitions). All measurement facets were considered to be random. Results indicate that there was very little repetition error but considerable interplotter error for most frames. Phi-coefficients for x- and y-coordinates, separately, fluctuated across frames. The univariate values for the x-coordinates were similar but slightly less than the multivariate values. The Phi-coefficients for Y, however, were considerably lower than the multivariate values. The multivariate Phi-coefficients for generalizing over three plotters and three repetitions ranged from .82 to .90.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Stress and cognitive functioning in sport     

J G Jones  L Hardy 《Journal of sports sciences》1989,7(1):41-63

This paper considers the relationship between stress and cognitive functioning and discusses some of the concepts and methods that may be adopted to examine the relationship between stress and sports performance. It considers only that literature that may be relevant to, or furthers, the understanding of sports performance under competitive stress. One of the most popular approaches has been to explain the relationship in terms of the unidimensional inverted-U hypothesis. The validity of this approach to explaining sports performances in specific situations is discussed and it is generally concluded that the inverted-U hypothesis is too vague and simplistic. The discussion considers multidimensional approaches and discusses the suitability and implications of some more recent and more complex models of stress and performance which are now available in the psychological literature. It is concluded that the relationship between stress and sports performance is an extremely complex one and involves the interaction between the nature of the stressor, the cognitive demands of the task being performed and the psychological characteristics of the individuals performing it.  相似文献   

Learning disabled readers' recall as a function of distinctive encoding, hemisphere processing and selective attention     

H L Swanson  J E Obrzut 《Journal of learning disabilities》1985,18(7):409-418

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谢建群 《图书情报工作》1997,41(8):50-51

多媒体电子期刊的制作谢建群（广州军区广州总医院信息科广州５１００１０多媒体电子期刊系统的硬件配置包括：ＭＰＣ配置和客户机／服务器配置。用户应根据所建电子期刊的大小和经济情况选用其中一种。一个完整的多媒体创作系统除需配有多媒体输入输出设备，如ＣＤ—ＲＯ...  相似文献   

中等学校体育课教学改革之我见     

谢代欣 《贵阳金筑大学学报》2004,(1):85-86

中等学校体育教学是体育教学的重要组成部分。改革教学方式方法，培养兴趣，提高教学质量。  相似文献   

Arnold Klebs as Humanistic Scholar     

Baumgartner L 《Bulletin of the Medical Library Association》1944,32(1):85-95

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由中国古代地方志学科属性问题引发的反思     

冯勰 《黄冈师范学院学报》2009,29(1):51-54

中国古代地方志的性质曾经长期是个争论的话题，本文以此为出发点，通过梳理这些争论，揭示了这些争论产生的根源是近代以来移植西方的不合理的学术分科状况，文章认为，我们应该在引入“西学”的同时，深入的研究西学的内在逻辑结构和社会、历史背景，在此基础上结合中国实际情况，建设符合中国思维习惯的学术范式和学科结构。  相似文献   

Committee on science and the arts     

L.F. Rondinella 《Journal of The Franklin Institute》1898,146(2):158-160

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The decline of women leaders (coaches and athletic directors) in girls' interscholastic sport programs in Virginia from 1972 to 1987     

M F Heishman  L Bunker  R W Tutwiler 《Research quarterly for exercise and sport》1990,61(1):103-107

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The effect of end-user searching on reference services: experience with MEDLINE and current contents     

L Salisbury  H S Toombs  E A Kelly  S Crawford 《Bulletin of the Medical Library Association》1990,78(2):188-191

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