Families were assessed in our laboratory using a research protocol approved by the University of Minnesota Institutional Review Board. Upon arrival, a complete description of the study was followed by written informed consent from parents and assent from minor offspring. All family members were interviewed simultaneously, each in a separate room by a different interviewer. Interviewers had an M.A. or B.A. in psychology, participated in intensive training, passed written examinations, and satisfied proficiency criteria. Adolescents also completed self-report questionnaires.
