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Hedberg, E. C.; Hedges, Larry – Society for Research on Educational Effectiveness, 2017
The purpose of this paper is to showcase new research that seeks to provide guidance on the heterogeneity of treatment effects by utilizing the variance of demographic differences in state assessments. This study is focused on a simple randomized block design where students are nested within schools, and within each school students are randomized…
Descriptors: Databases, Randomized Controlled Trials, Educational Research, Research Design
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Brown, Eric C.; Graham, John W.; Hawkins, J. David; Arthur, Michael W.; Baldwin, Megan M.; Oesterle, Sabrina; Briney, John S.; Catalano, Richard F.; Abbott, Robert D. – Evaluation Review, 2009
Communities That Care (CTC) is a prevention system designed to reduce adolescent substance use and delinquency through the selection of effective preventive interventions tailored to a community's specific profile of risk and protection. A community-randomized trial of CTC, the Community Youth Development Study, is currently being conducted in 24…
Descriptors: Longitudinal Studies, Cohort Analysis, Community Characteristics, Prevention