A randomized list of eligible children was created for each school, and families were contacted according to their placement on the list. For interested families, the Behavior Assessment System for Children (BASC; Reynolds & Kamphaus, 1992) Aggression scale was included in the parent assessment battery as a second screen in the recruitment process. Children whose parents rated them within the average range or above on the BASC Aggression scale were invited to enroll in the study. Families were contacted and assessed according to these procedures until six children were enrolled at each of the 20 schools.
