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Peer reviewedMcGrew, Kevin S.; And Others – Journal of Special Education, 1995
Comparison of 19 national data collection programs found significant variability in the disability categories used. Discussion focuses on issues related to improving disability identification in large-scale data collection programs and the effects of these issues on reporting policy-relevant information. (Author/DB)
Descriptors: Data Collection, Databases, Definitions, Disabilities
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
