Developing and Strengthening Cannabis Warnings: Warning Message Testing

Part of paid clinical trials in Chapel Hill, North Carolina.

Sponsor
University of North Carolina, Chapel Hill
Study ID
NCT07699198
Status
Not Yet Recruiting

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Conditions

  • Cannabis
  • Marijuana Use

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Accepted

Interventions

  • Constituents — BEHAVIORAL
    Participants will view and rate a message about constituents.
  • Cognitive Functioning — BEHAVIORAL
    Participants will view and rate a message about cognitive functioning.
  • Cardiovascular Health — BEHAVIORAL
    Participants will view and rate a message about cardiovascular health.
  • Motor Vehicle Crashes — BEHAVIORAL
    Participants will view and rate a message about motor vehicle crashes.
  • Dependence — BEHAVIORAL
    Participants will view and rate a message about dependence.
  • Psychosis and Schizophrenia — BEHAVIORAL
    Participants will view and rate a message about psychosis and schizophrenia.
  • Mental Health — BEHAVIORAL
    Participants will view and rate a message about mental health.
  • Reproductive Health — BEHAVIORAL
    Participants will view and rate a message about reproductive health.
  • Respiratory Health — BEHAVIORAL
    Participants will view and rate a message about respiratory health.
  • Edibles — BEHAVIORAL
    Participants will view and rate a message about edibles.
  • Cannabis Hyperemesis Syndrome — BEHAVIORAL
    Participants will view and rate a message about cannabis hyperemesis syndrome.
  • Control — BEHAVIORAL
    Participants will view and rate a control message.

Study Details

The purpose of this activity is to identify promising cannabis warning messages from different themes. Participants will be adults who live in the United States, including both people who use cannabis and those who do not use cannabis. In an online within-subjects experiment, participants will be randomly assigned to view 7 cannabis warning messages from different themes developed as part of previous study activities. After viewing each cannabis warning message, participants will rate the message on awareness, clarity, believability, cognitive elaboration, perceived message effectiveness, and reactance. The survey will take 15-20 minutes.

Key Dates

First listed
Jul 13, 2026
Start date
Jul 13, 2026
Status verified
Jun 2026
Primary completion
Nov 30, 2026
Completion
Nov 30, 2026

Study Design

Enrollment
1,500 participants (estimated)
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
PREVENTION

Arms

  • Experimental: Cannabis warning messages
    Participants will view and rate 7 cannabis warning messages. The cannabis warning messages cover 11 different themes plus a control theme and were identified in a previous study activity. Theme 1: Constituents Theme 2: Cognitive Functioning Theme 3: Cardiovascular Health Theme 4: Motor Vehicle Crashes Theme 5: Dependence Theme 6: Psychosis and Schizophrenia Theme 7: Mental Health Theme 8: Reproductive Health Theme 9: Respiratory Health Theme 10: Edibles Theme 11: Cannabis Hyperemesis Syndrome Theme 12: Control

Primary Outcome Measure

Cognitive Elaboration [ Time Frame: Baseline (one time online survey) ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
University of North Carolina at Chapel HillChapel HillNorth Carolina27514
Sarah D Kowitt, PhD, MPH
[email protected]
919-974-4980

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By research site
University of North Carolina at Chapel Hill· Chapel Hill, NC

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