Developing and Strengthening Cannabis Warnings: Warning Message Testing

Summary

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.

Conditions

• Cannabis
• Marijuana Use

Interventions

BEHAVIORAL

Constituents

Participants will view and rate a message about constituents.

BEHAVIORAL

Cognitive Functioning

Participants will view and rate a message about cognitive functioning.

BEHAVIORAL

Cardiovascular Health

Participants will view and rate a message about cardiovascular health.

BEHAVIORAL

Motor Vehicle Crashes

Participants will view and rate a message about motor vehicle crashes.

BEHAVIORAL

Dependence

Participants will view and rate a message about dependence.

BEHAVIORAL

Psychosis and Schizophrenia

Participants will view and rate a message about psychosis and schizophrenia.

BEHAVIORAL

Mental Health

Participants will view and rate a message about mental health.

BEHAVIORAL

Reproductive Health

Participants will view and rate a message about reproductive health.

BEHAVIORAL

Respiratory Health

Participants will view and rate a message about respiratory health.

BEHAVIORAL

Edibles

Participants will view and rate a message about edibles.

BEHAVIORAL

Cannabis Hyperemesis Syndrome

Participants will view and rate a message about cannabis hyperemesis syndrome.

BEHAVIORAL

Control

Participants will view and rate a control message.

Sponsors & Collaborators

• National Institute on Drug Abuse (NIDA)

  collaborator NIH

• University of North Carolina, Chapel Hill

  lead OTHER

Principal Investigators

• Sarah D Kowitt, PhD, MPH · University of North Carolina, Chapel Hill

• Leah M Ranney, PhD, MA · University of North Carolina, Chapel Hill

Study Design

Allocation

NA

Purpose

PREVENTION

Masking

NONE

Model

SINGLE_GROUP

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2026-07-13

Primary Completion

2026-11-30

Completion

2026-11-30

Countries

• United States

Study Locations