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Cannabis Warning Message Testing

This study is looking for adults in the United States to help test different warning messages about cannabis (marijuana) use. The goal is to find the most effective ways to communicate important information about cannabis, such as its effects on cognitive functioning (thinking and memory), cardiovascular health (heart and blood vessels), and the risk of dependence. You will view and rate various warning messages on topics like constituents (ingredients), cognitive functioning, cardiovascular health, motor vehicle crashes, and dependence. The study aims to understand how clear, believable, and effective these messages are. This is an online survey open to both people who use cannabis and those who do not. The study is currently recruiting participants.

Study design
This is an interventional study planning to enroll 1500 participants. You will be randomly assigned to view and rate different cannabis warning messages.
What's involved
You will complete an online survey that takes 15-20 minutes. During the survey, you will view and rate seven cannabis warning messages.
Compensation
Not stated in the trial record.
Follow-up
Your participation involves a one-time online survey at baseline, with no specified follow-up after that.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07699198

Developing and Strengthening Cannabis Warnings: Warning Message Testing

Not Yet Recruiting
NAAges 18+InterventionalPrevention
University of North Carolina, Chapel Hill
~1,500 participants
Updated 2026-07-13 on ClinicalTrials.gov
What's tested:ConstituentsCognitive FunctioningCardiovascular HealthMotor Vehicle CrashesDependencePsychosis and Schizophrenia

At a glance

Recruiting sites
0 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Cognitive Elaboration
Measured over Baseline (one time online survey)

Conditions

Cannabis
Marijuana Use

Explore related trials

Cannabis misuse

Where it's being run

1 sites across 1 states
North Carolina1

Study leadership

  • Sarah D Kowitt, PhD, MPH · PRINCIPAL_INVESTIGATOR · University of North Carolina, Chapel Hill
  • Leah M Ranney, PhD, MA · PRINCIPAL_INVESTIGATOR · University of North Carolina, Chapel Hill

Who to contact

Sarah D Kowitt, PhD, MPH
[email protected]
919-974-4980
Email the study team

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Do you actually qualify for this trial?

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Eligibility criteria

Inclusion

Age 18 years of age and older
Live in the United States

Exclusion

Age less than 18 years of age
Does not live in the United States

What this trial measures

  • Cognitive ElaborationBaseline (one time online survey)

    A one item measure of cognitive elaboration to assess how much a message makes the participant think about the health risks of cannabis. Response options are on a 5-point scale from 5='A great deal' to 1= 'Not at all', with higher scores indicating higher cognitive elaboration.