Abstract
In this postregistered study, we examined the daily associations between planned (vs. unplanned) nicotine, cannabis, and alcohol use and the moderating role of social-normative factors (i.e., descriptive and injunctive norms, nicotine product exposure on social media) on these associations among sexual-minority youths (SMYs). Participants (N = 82) completed a baseline assessment and then a 30-day ecological-momentary-assessment monitoring period. Plans to use substances early in the day were associated with a greater likelihood of later same-day nicotine, cannabis, and alcohol use. Friend descriptive norms were associated with greater planned alcohol use. Friend descriptive norms moderated the associations between use plans and nicotine and alcohol use, and parental injunctive norms moderated the associations between use plans and nicotine use. These findings underscore behavioral intentions and social-normative processes in substance use and suggest that tailoring interventions to address social norms may prove beneficial for SMYs.
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