All birth parent in-person assessments are conducted in a location convenient for the participant (most often at home) and include CAPI questions, interviewer-administered questions, and mailed/web-based questionnaires (completed prior to the interview). The first interview (3–6 months) also includes a pregnancy history calendar (completed by birth mothers via CAPI) about the birth mother's drug use and other behaviors during each trimester of pregnancy. The second in-person interview (18 months) is similar to the first interview and additionally includes the Composite International Diagnostic Interview (Kessler and Üstün 2004), an assessment of intelligence using two subscales from the Wechsler Adult Intelligence Scale (Wechsler 1997), and a CAPI version of the antisocial personality and conduct disorder sections from the Diagnostic Interview Schedule (Robins et al. 2000). The third in-person interview (54 months) mirrors the second assessment but incorporates several executive functioning tasks and an analog decision-making task.
