Parental knowledge was assessed via participants’ responses to three questions (how much their parent figures know about their plans, their interests, and where and with whom they spend time when not at home) adapted from Chassin et al. (1993), and included as part of the C-SSAGA. Responses were rated on a 4-point scale from 1 (always) to 4 (rarely). Cronbach’s alphas were .70 and .76 for T1 and T2, respectively. Items were reversed coded and averaged, and higher scores indicated higher parental knowledge.
