The OYS involved yearly data collection with alternating major (Grades 4, 6, 8, 10, and 12) and minor waves. The major assessments were multimethod and multiagent, including interviews and questionnaires for the youth and parents at the Oregon Social Learning Center (the appointment lasted approximately 2 hours), brief telephone interviews that provided multiple samples of recent behaviors (a total of six, 3 days apart), unstructured home observations (a total of three 45-minute observations at Grades 4 and 6 only), videotaped family problem-solving interaction tasks, school data (including teacher questionnaires and records data), and court records data. Rating scales were filled out by the interviewer on their impressions of the youth’s behavior and by the observers on their impressions of family members’ behavior. Minor waves were more limited in scope and focused mainly on the dependent variables, including measures of alcohol use. The data in the current study were taken from Wave 3 (ages 11 to 12 years, Grade 6) through Wave 9 (ages 17 to 18 years, Grade 12), over a period of 7 years. Family consent was mandatory. Participants were compensated for their time at each assessment wave.
