From 6th grade through 9th grade, self-report and teacher surveys were conducted primarily in the school context. If participants moved out of their original schools, they were followed to their new location. In the 11th grade, participants, their teachers, and their parents were assessed through the mail and through the school system. Participants were asked to bring a friend who would participate in a videotaped interaction task in the laboratory. The friend also completed a few questionnaires at the time of the interaction task. At the two early-adulthood assessment points, participants were assessed through the mail. All respondents were assured of the confidentiality of their responses. Participants, parents, teachers, and friends were compensated for their participation.
