“…The association between adolescent substance use and unprotected sex is well-documented (Connell, Gilreath, & Hansen, 2009). Although extensive research has highlighted event-level relationships between marijuana (Kingree, Braithwaite, & Woodring, 2000; Schumacher, Marzell, Toepp, & Schweizer, 2018) and alcohol (Dvorak et al, 2016; Kilwein & Looby, 2018) use and unprotected sex, there are likely other non-event-level explanations for higher rates of unprotected sex and unplanned pregnancy among substance-using adolescents. Specifically, there is evidence that sex-related attitudes and risk perceptions regarding sex are associated with actual sexual behaviors (Albarracín et al, 2005); for example, attitudes toward condoms are associated with actual condom use among adolescents (Halpern-Felsher, Kropp, Boyer, Tschann, & Ellen, 2004; Weinman, Small, Buzi, & Smith, 2008).…”