Children (N = 585) were recruited for the Child Development Project (Dodge, Bates, & Pettit, 1990) from two cohorts in 1987 and 1988 from three sites: Nashville, Tennessee; Knoxville, Tennessee; and Bloomington, Indiana. Children’s parents were approached at random during kindergarten preregistration, on the first day of class, and by phone or mail. About 75% of parents approached agreed to participate. The schools and the composite sample reflected a broad range of socioeconomic status groups that were representative of the populations at the respective sites. The Hollingshead index of SES (M = 39.53, SD = 14.01) ranged from 8 to 66 for the original sample (reflecting a broad range), which was 52% male, 81% European American, 17% African American, and 2% of “other” ethnicity.