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Murray, David M.; Short, Brian – Journal of Drug Education, 1996
School-based alcohol use prevention studies frequently employ designs in which schools are assigned to treatment conditions while observations are made on individuals. This article presents estimates of school-level intraclass correlation for measures related to alcohol use among students in grades 9 and 12 and discusses their use in planning new…
Descriptors: Adolescents, Alcohol Abuse, Alcohol Education, Alcoholism