The first presentation examines the longitudinal impact of concurrent and simultaneous co-use of alcohol and cannabis in young adulthood on substance use patterns, substance related harms and mental health symptoms across two years in a community-based sample. Findings are that cannabis is rarely used in isolation and simultaneous use is much more common than concurrent use. Both types of co-use increased substance use and related harms compared to alcohol only users but simultaneous users report higher levels of substances and experience substance related harm compared to concurrent users. Proposals for preventive interventions are suggested.
The second presentation “A Personalized Normative Feedback Approach to Reducing Heavy Marijuana Use among College Students in a State with Legalized Adult Recreational Use” reports and an evaluation of the mediated program effects from the Marijuana e-CHECKUP TO GO program, a web-based marijuana misuse intervention providing university-specific personalized normative feedback (PNF) and research-supported protective behavioral strategies (PBS) to students attending a university in a state with legalized adult recreational marijuana. Results demonstrate support for Marijuana e-CHECKUP TO GO and illustrate a specific mechanisms and contexts through which the program had its effects.
The third presentation “Letting Go and Staying Connected, a theoretically guided, developmentally targeted, and empirically supported intervention for parents of students transitioning to college” focuses on the potential role of parents in preventing cannabis use during their first year at college. . Most parents found the intervention useful and engaging, but full dosage was low. Future analyses will illuminate underage students’ use of cannabis and the relation of parent-student relationship quality with student use.
The discussion will focus on current policy strategies that address youth cannabis use in Canada and the US states where cannabis is legalized.