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Spybrook, Jessaca; Raudenbush, Stephen W. – Educational Evaluation and Policy Analysis, 2009
This article examines the power analyses for the first wave of group-randomized trials funded by the Institute of Education Sciences. Specifically, it assesses the precision and technical accuracy of the studies. The authors identified the appropriate experimental design and estimated the minimum detectable standardized effect size (MDES) for each…
Descriptors: Research Design, Research Methodology, Effect Size, Correlation