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921.
Allen Jackson Larry Bruya William Baun Peggy Richardson Robert Weinberg Irma Caton 《Research quarterly for exercise and sport》2013,84(2):163-164
Abstract Nineteen college men and women (aged 18–23 yrs, × = 21.1) were studied to ascertain the force-time components of a rapid maximal voluntary isometric contraction (MVC) for ankle dorsiflexors, knee extensors, elbow flexors, wrist flexors and hand grip. Standardized isometric strength testing protocol was used. After a practice period subjects were instructed to make an MVC without jerking and as quickly as possible, for each of the muscle actions noted above. Force readings were taken from a load cell assembly through an analogue-to-digital converter and analyzed to yield time values for MVC, 3/4 MVC, 1/2 MVC, and 1/4 MVC. The results indicated significant differences (p < .01) between the responses of the men and women, with the women reaching full MVC more rapidly than the men. Also, there were significant differences among the five muscle groups tested, with the wrist flexor muscle group developing MVC most quickly, while the knee extensors took the longest time to full MVC. Based upon these data it may be concluded that the time to full MVC differs between men and women, and also that the time to full MVC differs among the five muscle groups tested in this experiment. 相似文献
922.
Robert N. Singer A. Mark Williams Shane G. Frehlich Christopher M. Janelle Steven J. Radlo Douglas A. Barba 《Research quarterly for exercise and sport》2013,84(3):290-296
This study compares the motor skills and physical fitness of school-age children (6-12 years) with visual impairments (VI; n = 60) and sighted children (n = 60). The relationships between the performance parameters and the children's body composition are investigated as well as the role of the severity of the impairment. The degree of VI did not differentially affect the outcomes. Compared to their sighted peers, the children with VI scored lower on the locomotor and object control skills as assessed with the Test of Gross Motor Development-2, and the physical fitness (Eurofit) parameters of plate tapping, the standing broad jump, the modified 5 × 10-m shuttle run, and 20-m multistage shuttle run (20-MST). Their body mass and body fat indexes were inversely correlated with the standing broad jump and the 20-MST, but positively correlated with handgrip strength. Moreover, significant inverse correlations were found between their locomotor and object control skills on the one hand and plate tapping and the 5 × 10-m shuttle run on the other hand. Given the relatively high proportion (25%) of overweight/obese children within the VI sample, educators are recommended to promote health-related activities and help enhance motor skills in this population. 相似文献
923.
Abstract This study investigated the effects of three different amounts of practice in combination with two types of variable practice conditions upon schema development. Seventy-two subjects were administered either 6, 18, or 36 trials while learning to move to either one- or three-criteria goals on the linear positioning task. Subjects then had 18 no-KR (knowledge of results) trials to produce a novel response. The statistical analysis revealed a significant three-way interaction for absolute error while no significant main or interaction effects existed for constant or variable error. Analysis of the simple main effects showed that the various amounts of practice produced similar performances for the subjects learning to move to only one criterion goal. For the subjects learning to move to three criteria goals during initial practice, the amount of practice provided was a significant factor in the accuracy and strength of the motor schema. Partial support is presented for schema theory. 相似文献
924.
Robert J. Synovitz 《Research quarterly for exercise and sport》2013,84(4):650-657
Abstract The Borozne Health Information Opinionnaire was used to determine the amount and kind of harmful health misconceptions believed by students in basic health information classes in four-year colleges in the state of Indiana, and whether they were affected by the following factors: age, grade level, sex, race, course background, rural or urban background, marital status, major area of academic preparation, school attended, geographic location, and religion. Findings revealed (a) the most prevalent harmful health misconceptions; (b) subject-matter areas which contained the greatest percentage of harmful health misconceptions believed by the students; and (c) the existence of significant differences between the mean harmful health misconception scores of the sex, race, marital status, grade level, major area of acadmic preparation, and course background subgroups. 相似文献
925.
Robert Lee Chartrand 《The Information Society》2013,29(1):91-96
Abstract Information systems design can progress toward meeting the needs of the population of decision‐makers, managers, policy‐makers, and interdisciplinary workers by attention to specifications obtained from the user's situation. The user situation is represented by problems and their component dimensions, of which subject is only one dimension. The other problem dimensions, which relate to information traits, are discussed for the purpose of proposing a new orientation for the design of information systems. 相似文献
926.
927.
Charles Steinfield Robert LaRose Han Ei Chew Stephanie Tom Tong 《The Information Society》2013,29(2):110-120
This study examines the relationships between information and communication technologies (ICT) usage, the benefits a company derives from membership in a rural business cluster, and the success of rural companies. Analysis of 333 rural businesses located in northern lower Michigan showed a strong relationship between (a) ICT adoption and benefits derived from the membership in business clusters, (b) ICT adoption and self-reported business success, and (c) benefits derived from business clusters and business success. Although analysis indicates that these relationships may be industry specific, results suggest that ICT adoption by rural enterprises may have advantages for the region's social capital and business success and may help reduce the digital divide experienced in rural communities. 相似文献
928.
Physical Education Teacher Attitudes toward Fitness Tests Scale: Cross-Revalidation and Modification
Xiaofen D. Keating Jianmin Guan Robert H. Ferguson Li Chen Dwan M. Bridges 《Measurement in physical education and exercise science》2013,17(2):72-87
This study aimed to provide further evidence of validity and reliability for the Physical Education Teacher Attitudes toward Fitness Tests Scale (PETAFTS), which consisted of affective and cognitive domains. There were two subdomains in the affective domain (i.e., enjoyment of implementing fitness tests and enjoyment of using test results) and one domain in the cognitive domain (i.e., beliefs in the usefulness of test results). Full-time physical education teachers (N?=?469) from two southwestern states in the United States participated in the study. Reliability and validity of the scale were examined. Alphas were computed for the entire 16-item scale, the affective and cognitive domains, and the two subdomains, respectively, to test the reliability. Confirmatory factor analysis (CFA) was employed to investigate the construct validity. The commonly used CFA indices, such as the chi square (χ2), the comparative fit index (CFI), the Tucker-Lewis Index (TLI), the goodness of fit index (GFI), and the root mean square error of approximation (RMSEA), were used to assess the fit of the data to the model. The CFA results suggested that the data from the study did not fit the original model proposed by Keating and Silverman (2004b), resulting in the elimination of item 3. The fitness of the data to the model was improved and deemed acceptable. More studies on the reliability and validity of the scale are needed in the future in order to use the scale with more confidence. 相似文献
929.
Tony Pritchard Andrew Hawkins Robert Wiegand Jonathan N. Metzler 《Measurement in physical education and exercise science》2013,17(4):219-236
Two instructional approaches that have been of interest in promoting sport have been the Sport Education Model (SEM) and the Traditional Style (TS) of teaching physical education. The purpose of this study was to investigate how SEM and TS would affect skill development, knowledge, and game performance for volleyball at the secondary level. A 2 × 3 (group × time) research design was utilized on 47 secondary students testing volleyball skills, knowledge, and game performance. Participants were placed in either the SEM or the TS via stratified randomization, and then were tested pre, mid, and post intervention through the 20-lesson volleyball unit. The 2 × 3 repeated measures Analysis of Variances (ANOVAs) with Bonferroni correction revealed no significant difference between models for skills and knowledge, but there was for game performance for group [F(1, 45) = 10.27, p < .008, η2 = .19], time [F(2, 90) = 8.62, p < .008, η2 = .16], and group × time interaction [F(2, 90) = 8.43, p < .008, η2 = .16]. If the goal of the physical education program is to promote quality game play, the SEM may be more effective than the TS. 相似文献
930.
Bourdieu's analytic concept of habitus has provided a valuable means of theorising coach development but is yet to be operationalised in empirical research. This article redresses this oversight by drawing on a larger study that inquired into how the ‘coaching habitus’ of elite-level Australian and New Zealand rugby coaches structured their interpretation and use of the Game Sense approach to coaching to illustrate how habitus can be operationalised. It focuses on the identification of characteristics of the individual coaching habitus of four elite-level Australian rugby coaches and how they shape their interpretation and use of Game Sense. Drawing on suggestions made by Lau, we identify the characteristics of four individual ‘coaching habitus’ by examining their views on: (1) the characteristics of good coaches; (2) characteristics of great rugby players and how to develop them; and (3) their dispositions towards innovation in coaching. 相似文献