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An Empirical Study Of Design Parameters For Planning Two-Level And Three-Level Cluster Randomized Trials To Detect Moderator Effects, Qi Zhang

Dissertations

In the last two decades, we have seen an increasing number of impact studies in education that are designed to detect a meaningful average treatment effect, which answers the what works question. Recently, researchers have started to consider how to expand the design of impact studies to answer questions regarding the treatment effect heterogeneity across different contexts, such as for whom and under what conditions programs work. Answering these questions is imperative in the quest to make evidence-based and context-relevant decisions to improve educational outcomes for all students.

Many of the impact studies utilize a cluster randomized trial (CRT). CRTs …