The Project on Human Development in Chicago Neighborhoods (PHDCN) was a large-scale, interdisciplinary study of how families, schools, and neighborhoods affect child and adolescent development. One component of the PHDCN was the Longitudinal Cohort Study, which was a series of coordinated longitudinal studies that followed over 6,000 randomly selected children, adolescents, and young adults, and their primary caregivers over time to examine the changing circumstances of their lives, as well as the personal characteristics, that might lead them toward or away from a variety of antisocial behaviors. Numerous measures were administered to respondents to gauge various aspects of human development, including individual differences, as well as family, peer, and school influences. One such measure was the primary caregiver version of the Oppositional Defiance Disorder instrument, which was administered to subjects' primary caregivers for Cohorts 3, 6, and 9. The instrument was adapted from the Disruptive Behavior module of the Diagnostic Interview Schedule for Children (DISC 4) and obtained information regarding subjects' defiant behavior. It is closely related to PROJECT ON HUMAN DEVELOPMENT IN CHICAGO NEIGHBORHOODS (PHDCN): OPPOSITIONAL DEFIANCE DISORDER (PRIMARY CAREGIVER), WAVE 2, 1997-2000 (ICPSR 13640).