This article reports a meta-analysis on social skills training as a measure for preventing antisocial behavior in children and youth. From 851 documents, 84 reports containing 135 comparisons between treated and untreated youngsters (N = 16,723) fulfilled stepwise eligibility criteria (e.g., randomized control-group design, focus on prevention). Despite a wide range of positive and negative effect sizes, the majority confirmed the benefits of treatment. The best estimated mean effects were d = .38 (postintervention) and .28 (follow-up). Effects were smaller on antisocial behavior than on related social and cognitive measures. Studies with large samples produced lower effect sizes than those with smaller samples. Programs targeting at-risk groups had better effects than universal programs. Modes of treatment did not differ significantly; however, cognitive-behavioral programs had the strongest impact on antisocial behavior. More well-controlled studies with large samples, hard outcome criteria, and long follow-up periods are needed, particularly outside the United States.
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