This report addresses three levels of questions about the effectiveness of the Michigan State University Multiple Risk Outreach Program (MROP). The MROP was designed to recruit families from this high-risk population and test the implementation of an intervention protocol in a population-based program for 3- to 6-year-olds and their families. This intervention protocol had proven to be effective in the management and reduction of conduct problems among older, clinically referred children. A total of 99 families, all Caucasian, formed the study sample. Questions addressed concerned: (1) the effectiveness of the recruitment strategy; (2) characteristics of the mother-only treatment condition, the both-parents treatment condition, and the no-treatment control condition; and (3) the outcome for children in families who received the intervention protocol versus the outcome for those who did not. Data from the subset of families who completed the intervention and the study through the posttreatment assessment and evaluation phase are presented. (RH)