影响中、美两国青少年参加体育活动因素的比较研究     

周丽君  于可红  莱利·汉斯利 《中国体育科技》2007,43(4):27-31

以中国东部沿海的浙江省和美国中北部的爱荷华州这两个经济、教育实力相对较为接近地区的青少年作为研究对象,把影响这两个地区青少年参与体育活动的因素作为研究内容,对影响两国青少年参加体育活动的因素及异同进行比较分析.  相似文献   

Relative cue properties of novel-tasting substances in avoidance conditioning     

John F. Wing  Larry A. Birch 《Learning & behavior》1974,2(1):63-65

Rats injected with lithium chloride on a day when they tasted a novel substance, saccharin, subsequently showed avoidance, or bait shyness. However, magnitude of avoidance depended upon the substances given the rats on the days just before and after injection day. Maximum avoidance was found for rats given a familiar, contrasting substance (water) on the days before and after, whereas minimum avoidance was shown by rats given saccharin on those days (as well as on injection day). Intermediate avoidance was found for rats given water on either the day before or the day after. Results confirm the importance of contrasting taste cues in successive discrimination tasks employed in bait-shyness studies.  相似文献   

A national study of prevocational education     

H. Dwain Baldridge  Larry J. Bailey 《Journal of Career Development》1992,18(4):305-313

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The alterability and measurement of learning rates     

N. Bezruczko  L.H. Ludlow 《Studies in Educational Evaluation》1981,7(1):97-104

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Students' eye view of an external doctoral program's first-year summer residency functioning     

Harold Harty  Edward C. Kormanyos  Larry G. Enochs 《Innovative Higher Education》1983,7(2):80-90

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Using SAS® PROC CALIS for path analysis: An introduction     

Larry Hatcher 《Structural equation modeling》2013,20(2):176-192

This article presents a straightforward approach for using PROC CALIS programs that will perform path analyses using observed variables. The step‐by‐step approach should help the beginner understand concepts in path analysis and how to use the SAS^® System's PROC CALIS procedure. The approach begins with the development of a program figure, a figure that graphically illustrates the researcher's theoretical model and identifies the parameters to be estimated in the model. A set of 14 rules guide this task. The article illustrates how to convert the program figure into a PROC CALIS program that will estimate parameters in the diagrammed model and how to review the output of PROC CALIS (e.g., residuals, chi‐square test, fit indices) to assess the fit of the model to the data.  相似文献   

Small Sample Properties of Bayesian Multivariate Autoregressive Time Series Models     

Larry R. Price 《Structural equation modeling》2013,20(1):51-64

The aim of this study was to compare the small sample (N = 1, 3, 5, 10, 15) performance of a Bayesian multivariate vector autoregressive (BVAR-SEM) time series model relative to frequentist power and parameter estimation bias. A multivariate autoregressive model was developed based on correlated autoregressive time series vectors of varying lengths (T = 25, 50, 75, 100, 125) using Statistical Analysis System (SAS) version 9.2. Autoregressive components for the 5 series vectors included coefficients of .80, .70, .65, .50 and .40. Error variance components included values of .20, .20, .10, .15, and .15, with cross-lagged coefficients of .10, .10, .15, .10, and .10. A Monte Carlo study revealed that in comparison to frequentist methods, the Bayesian approach provided increased sensitivity for hypothesis testing and detecting Type I error.  相似文献   

Cyberliteracy: Navigating the Internet with Awareness, by L. J. Gurak. New Haven, CT: Yale University Press, 2001. vii + 194 pp. $30.00. ISBN 0-300-08979-1.     

Larry J. Mikulecky 《The Information Society》2004,20(1):59-60

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In practice: Ball State University's faculty mentorship program: Enhancing the first‐year experience for students with disabilities     

Jacqueline Harris  Taiping Ho  Larry Markle  Roger Wessel 《About Campus》2011,16(2):27-29

Students with disabilities at Ball State University have a unique mentorship opportunity—those who take advantage of it gain considerable benefits.  相似文献   

Body Fatness and Performance Differences between Men and Women     

Kirk J. Cureton  Larry D. Hensley  Antoinette Tiburzi 《Research quarterly for exercise and sport》2013,84(3):333-340

The purpose of this study was to determine the extent to which the mean difference in performance between men and women on selected physical performance tests was related to the sex difference in body fatness. Percent total body fat (% fat) estimated from skinfold thickness measures and performances on the modified pull-up, vertical jump, 50-yard dash, and 12-minute-run tests were measured on 55 male and 55 female college students. Males had significantly less fat and performed significantly better than females on each of the performance tests. Mean differences were 8.2% fat, 20.0 modified pull-ups, 20.8 cm on the vertical jump, 1.3 seconds on the 50-yard dash, and 590 m on the 12-minute run. Linear regression equations predicting performance scores from % fat within the groups of men and women indicated that if body fatness in men and women were similar, performance differences would be reduced, on the average, by 7 modified pull-ups, 4 cm on the vertical jump, .5 seconds on the 50–yard dash, and 146 m on the 12-minute run. These expected changes in performance were 36%, 19%, 38%, and 25% of the mean sex difference in performance on the four physical performance tests, respectively. It was concluded that greater body fatness is one characteristic that partly explains why women, on the average, do not perform as well as men on strenuous tasks requiring movement of the body weight. The sex-specific difference in body fatness should be one factor considered in establishing separate occupational and athletic performance expectations for men and women.  相似文献