Feasibility and Acceptability of the Cannabis Awareness and Prevention Toolkit
June 30, 2026 updated by: Bonnie Halpern-Felsher, Stanford University
The Stanford Smart Talk Cannabis Awareness and Prevention Curriculum includes 5 lessons, each providing activities, online quiz games, and worksheets in addition to presentations, resources, and other materials aimed at addressing key factors associated with youth cannabis use, including changing adolescents' attitudes towards and misperceptions about cannabis; increasing their refusal skills to pulls of marketing and social media; reducing stress and depression which have been linked to cannabis initiation and use; improving coping skills; and decreasing intentions and actual use of all cannabis products.
The aim of this study is to investigate the extent to which the curriculum changes students' intentions to use and actual use of cannabis.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Actual)
658
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
California
-
Palo Alto, California, United States, 94304
- Stanford University
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
10 years to 20 years (Child, Adult)
Accepts Healthy Volunteers
Yes
Description
Inclusion Criteria:
- Middle school and high school students receiving health education at schools participating in the study
Exclusion Criteria:
-
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
|---|---|
|
Experimental: Receives the Stanford Smart Talk Cannabis Prevention and Awareness curriculum
Stanford Smart Talk Cannabis Prevention and Awareness curriculum administered
|
Stanford Cannabis Awareness and Prevention curriculum delivered as a 5-session curriculum administered in a school classroom setting.
|
|
No Intervention: Does not receive Stanford Smart Talk Cannabis Prevention and Awareness curriculum
Receives another curriculum or no cannabis prevention curriculum
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Cannabis Use (Lifetime)
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assess lifetime cannabis use.
This outcome measure assesses cannabis use.
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
|
Cannabis Use (Past 30 Days)
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assess cannabis use in the past 30 days.
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
|
Intention to Use Cannabis in the Future - Smoked Cannabis
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assessing participant intention to use cannabis in the future.
Assessed on a Likert-scale (1 - Definitely not, 4 - Definitely yes).
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
|
Intention to Use Cannabis in the Future - Vaped Cannabis
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assessing participant intention to use cannabis in the future.
Assessed on a Likert-scale (1 - Definitely not, 4 - Definitely yes).
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
|
Intention to Use Cannabis in the Future - Cannabis Edibles
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assessing participant intention to use cannabis in the future.
Assessed on a Likert-scale (1 - Definitely not, 4 - Definitely yes).
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
|
Cannabis Knowledge
Time Frame: Baseline and Post-intervention (approx. 3 days post-baseline)
|
Participants were asked 13 questions related to their knowledge of cannabis, resulting in an overall scale of 0 to 13, higher scores indicated greater knowledge.
|
Baseline and Post-intervention (approx. 3 days post-baseline)
|
|
Perceived Addictiveness and Harmfulness - Smoked Cannabis
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assessing participants' perceptions of cannabis addiction and harm.
Assessed on a Likert-scale (1 - Not at all addictive/harmful, 5 - Extremely addictive/harmful).
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
|
Perceived Addictiveness and Harmfulness - Vaped Cannabis
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assessing participants' perceptions of cannabis addiction and harm.
Assessed on a Likert-scale (1 - Not at all addictive/harmful, 5 - Extremely addictive/harmful).
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
|
Perceived Addictiveness and Harmfulness - Cannabis Edibles
Time Frame: Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Investigator-originated survey measures (questions) assessing participants' perceptions of cannabis addiction and harm.
Assessed on a Likert-scale (1 - Not at all addictive/harmful, 5 - Extremely addictive/harmful).
|
Baseline, Post-intervention (approx. 3 days post-baseline), and 6-month Follow-up
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Bonnie Halpern-Felsher, Ph.D., Stanford University
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
October 1, 2022
Primary Completion (Actual)
May 16, 2025
Study Completion (Actual)
May 16, 2025
Study Registration Dates
First Submitted
August 26, 2022
First Submitted That Met QC Criteria
August 26, 2022
First Posted (Actual)
August 30, 2022
Study Record Updates
Last Update Posted (Actual)
July 28, 2026
Last Update Submitted That Met QC Criteria
June 30, 2026
Last Verified
June 1, 2026
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 58068
- 1R34DA053704 (U.S. NIH Grant/Contract)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.