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Direct linkJacob, Robin; Zhu, Pei; Bloom, Howard – Journal of Research on Educational Effectiveness, 2010
This article provides practical guidance for researchers who are designing studies that randomize groups to measure the impacts of educational interventions. The article (a) provides new empirical information about the values of parameters that influence the precision of impact estimates (intraclass correlations and R[superscript 2] values) and…
Descriptors: Research Design, Research Methodology, Educational Research, Intervention
