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Muth, Chelsea; Bales, Karen L.; Hinde, Katie; Maninger, Nicole; Mendoza, Sally P.; Ferrer, Emilio – Educational and Psychological Measurement, 2016
Unavoidable sample size issues beset psychological research that involves scarce populations or costly laboratory procedures. When incorporating longitudinal designs these samples are further reduced by traditional modeling techniques, which perform listwise deletion for any instance of missing data. Moreover, these techniques are limited in their…
Descriptors: Sample Size, Psychological Studies, Models, Statistical Analysis
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Zhang, Jiabei – Physical Educator, 2011
The purpose of this study was to analyze quantitative needs for more adapted physical education (APE) teachers based on both market- and prevalence-based models. The market-based need for more APE teachers was examined based on APE teacher positions funded, while the prevalence-based need for additional APE teachers was analyzed based on students…
Descriptors: Adapted Physical Education, Incidence, Primatology, Physical Education Teachers