You may be eligible for this study if you meet the following criteria.

Inclusion Criteria:

• Active-duty men in the U.S. Marines
• Drink alcohol
• A male friend in the USMC who is also willing to participate

Overall Duration
The study lasts about 2 weeks.

Study Activities (All Online/Remote)
All parts of this study are completed online. Participants will:

• Orientation Session (about 30 minutes):
  Meet with a member of the research team online, review the study, give consent, and complete a survey about alcohol use, entertainment preferences, and social behavior. You will also learn how to use a mobile app for daily surveys.
• Daily Surveys (about 5 minutes each, twice a day for 14 days):
  Complete short surveys each morning and evening using a mobile app (about 10 minutes total per day). These surveys will ask about your daily activities, alcohol use, and social interactions.
• Drink Reports (as needed):
  When you have your first drink, you will start a quick report in the app. The app will then send two short follow-up surveys later that same day.
• Paired Participation:
  You and a male friend (who is also in the USMC and joins the study) will complete the daily surveys during the same 2-week period. At times, you may be asked questions about your friend’s behavior if you are together.
• Online Activity with Your Friend (about 1 session):
  You and your friend will complete an online activity together where you make choices and discuss preferences. This session may be recorded (audio/text) for research purposes.

Data Collection & Privacy
The study collects survey responses and app-based entries. Conversations during the online activity may be recorded for research. No in-person visits are required, and participation is fully remote

Participants may earn up to $450 for their time.

There is no cost for you to participate in our research study.