The Kiddie Schedule for Affective Disorders for School-Age Children(KSADS; Kaufman et al., 1997) is a clinician-administered semi-structured interview that was used to assess for DSM-IV-TR psychopathology, including substance use disorders. When a parent/legal guardian elected to participate in the study, the parent/legal guardian and adolescent were interviewed separately. Information collected from these interviews was integrated using an algorithm that identified the presence of a disorder if sufficient criteria were endorsed by either the parent or adolescent (Henin et al., 2007). In cases where a parent was unavailable to complete the assessment battery, diagnostic determinations were based on the adolescent’s report. In no case did parents’ reports of teenagers’ AUD symptoms add to the information already gathered from the adolescents themselves. Interviewers received systematic training in diagnostic assessment with adolescents to achieve a high level of inter-rater reliability (kappa > 0.90) at the item severity level prior to conducting interviews independently. Two clinical psychologists (RM, AJ) reviewed all cases at weekly case consensus meetings to minimize potential drift in item severity ratings by interviewers. All symptom severity level and diagnostic decisions
