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Peer reviewedBrewer, James K.; Sindelar, Paul T. – Journal of Special Education, 1988
From a priori and post hoc data collection perspectives, this paper describes the interrelations among (1) power, alpha, effect size, and sample size for hypothesis testing; and (2) precision, confidence, and sample size for interval estimation. Implications for special education researchers working with convenient samples of fixed size are…
Descriptors: Data Collection, Disabilities, Educational Research, Effect Size
Peer reviewedJohnson, David E. – Teaching of Psychology, 1996
Provides an exercise for introducing research methods to undergraduates. The students view a graph revealing that left-handed people are underrepresented in older age groups. Small group discussions attempt to explain this phenomenon. A follow-up class discussion focuses on the different approaches and methods available for interpreting the data.…
Descriptors: Causal Models, Critical Thinking, Data Interpretation, Factor Analysis
Greer, John T. – 1983
This paper discusses problems the author encountered in attempting to conduct a study of teacher motivation as influenced by a combination of participative decision-making and financial rewards. Over a 3-year period, teacher motivation was to be viewed as influenced by two independent variables--participative decision-making and financial rewards;…
Descriptors: Academic Achievement, Administrators, Analysis of Covariance, Compensation (Remuneration)
