The sample comprised 2,844 adolescents and young adults from the Risk Behavior and Well-Being in Adolescence and Young Adulthood study (RIWA; Brodbeck, Matter, & Moggi, 2006; Brodbeck, Matter, Page, & Moggi, 2007; Brodbeck, Vilén, Bachmann, Alsaker, & Znoj, 2010), a 5-year longitudinal study based on an urban Swiss sample. At baseline (Time 1, or T1), a random sample of 16- to 24-year-old urban Swiss young men and women was selected based on the official registers of the Residents’ Administration Offices of the Swiss cities of Basel, Bern, and Zurich.
