The goal of this clinical trial is to develop and test a brief online intervention to reduce alcohol and cannabis misuse and improve healthy relationship skills among young adult couples. The main questions it aims to answer are: * Will the intervention be feasible and acceptable to young adult couples? * Will the intervention demonstrate initial efficacy in reducing risky substance use and increasing relationship functioning? Eligible couples will complete a virtual baseline session and be randomized to intervention condition (online intervention with 3-5 weeks of self-paced modules) or control condition (no intervention). Couples will complete two follow-up surveys (post-assessment - approximately 5 weeks after baseline, 3-month). Couples in the control condition will be offered the intervention after 3-month follow-up. Researchers will compare intervention and control groups to see if there there is a difference between the groups on substance misuse and relationship functioning at post-assessment and 3-month follow-up.
Age range
18 Years – 29 Years
Sex
ALL
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Heavy episodic and high intensity drinking
Timeframe: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Daily Drinking Questionnaire (DDQ)
Timeframe: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Daily Marijuana Questionnaire (DMQ)
Timeframe: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Intensity of Marijuana Use
Timeframe: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Perceived Program Effects on Healthy Relationship Self-Efficacy items
Timeframe: Screening, baseline, approximately 5 weeks after baseline, 3-month followup
Couples Satisfaction Index
Timeframe: Screening, baseline, approximately 5 weeks after baseline, 3-month followup