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Download full textSpybrook, Jessaca; Lininger, Monica; Cullen, Anne – Society for Research on Educational Effectiveness, 2011
The purpose of this study is to extend the work of Spybrook and Raudenbush (2009) and examine how the research designs and sample sizes changed from the planning phase to the implementation phase in the first wave of studies funded by IES. The authors examine the impact of the changes in terms of the changes in the precision of the study from the…
Descriptors: Evaluation Criteria, Sampling, Research Design, Planning
