Developing and Testing an Online Intervention for Alcohol and Cannabis Misuse and Healthy Relationship Skills Among Young Adult Couples

Developing and Testing an Online Intervention for Decreasing Alcohol and Cannabis Misuse and Increasing Healthy Relationship Skills Among Young Adult Couples: A Comprehensive Mixed-methods Approach

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.

Inclusion Criteria:

• Both partners in the couple are 18-29 years old
• In a committed romantic relationship (e.g., dating seriously, cohabiting, married) with each other for at least 3 months
• Face-to-face contact their partner at least 5 days per week
• Live in Washington State
• Have a valid email address and access to a cell phone
• Report alcohol and cannabis co-use at least three times in the past month
• Willingness to: complete online surveys during the allotted time frames, receive text messages and emails from the project, complete a baseline session, and participate during the same time period as their partner

Exclusion Criteria:

• Couples who endorse any perpetration or receipt of severe interpersonal aggression during screening will be excluded and provided with resources