Approximately 2 weeks before the freshmen were scheduled to arrive on campus, we mailed information about the study to all incoming freshmen and (separately) their parents. The week before Welcome Week all eligible freshmen (age 18 or older) received an e-mail through their university e-mail account inviting them to participate in the project. Survey reminders were sent weekly for the first 4 weeks and then intermittently for the remaining 6 weeks. Students who turned 18 over the course of data collection were invited to participate shortly after their birthdays. The invitation e-mail contained a link to an on-line survey with questions about personality and behavior, as well as family, friends, and experiences growing up. All students that initiated the survey were first led through a consent process that further explained the study and their participation. We estimated the entire survey would take approximately 15–30 min to complete. [Of note, we considerably shortened the survey in the spring based on focus group feedback that survey completion took closer to an hour and that this was the major deterrent to participation.] Upon
