Abstract
A meta-analysis examining the effectiveness of Behavioral Parent Training for children and adolescents with externalizing behaviors and disruptive behavior disorders was conducted with 79 outcome studies conducted between 1966 and 2001. Separate analyses were conducted for studies employing between-subjects, within-subjects, and single-subject experimental designs. Single-subject design studies were examined utilizing two meta-analytic techniques, ITSACORR and the No Assumptions method. The overall mean weighted effect sizes were.30 for the between-subjects designs and.68 for within-subjects designs. For the single-subject design studies, the overall mean weighted effect size using ITSACORR was.54, and the overall mean weighted effect size using the No Assumptions method was 1.56. Results indicated that across each of the experimental designs, the method of intervention appears to be a significant moderator variable. A discussion of the results addresses comparisons with prior Behavioral Parent Training meta-analyses, as well as implications for research and practice.
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