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Jenson, Jeffrey M.; Dieterich, William A.; Rinner, Jenifer R.; Washington, Felicia; Burgoyne, Kathleen E. – Children & Schools, 2006
Group-randomized trials (GRTs)--studies that evaluate the efficacy or effectiveness of interventions occurring at the group level--are increasingly used to assess the effects of school-based prevention programs on behavioral outcomes of children and adolescents. These designs pose many implementation and design challenges for school…
Descriptors: Prevention, Research Problems, Program Design, Program Effectiveness