Marijuana research studies

The following are marijuana research studies being conducted by the Brown University School of Public Health, which are looking for active participants:

Arthritis Research Study at Brown University looking for volunteers ages 18-65. Eligible participants must have a current rheumatoid or psoriatic arthritis diagnosis to participate in confidential research on cannabis’ effects on associated pain and inflammation. Receive $300 by completing the study. Call 401-863-6433 or email [email protected] [Study protocol # 1904002430]


Estudio de Investigación de Artritis en la Universidad de Brown en busca de voluntarios de 18 a 65 años. Los participantes elegibles deben tener un diagnóstico actual de artritis reumatoide o psoriásica para participar en una investigación confidencial sobre los efectos del cannabis en el dolor e inflamación. Reciba $300 por completar el estudio. Llame al 401-863-6433 o envié un correo electrónico a [email protected] [Protocolo de estudio # 1904002430]

Who: Age 18-30

About:  We are looking for research volunteers in the Providence area who drink alcohol and use cannabis regularly to participate in a paid confidential research study from Brown University. 

Time Involved: Participation involves completing interviews, filling out questionnaires, and the use of an alcohol sensor bracelet and smart phones to report on alcohol and other substance use in daily life for four weeks. Procedures will occur remotely (via videoconference) with the option of an in-person session.

Compensation:   Participants will be compensated up to $450 for their participation.

Contact: or (401) 863-6635

See if you are eligible

Who: Do you use cannabis and/or alcohol? Are you between the ages of 18-25?

About: You may be eligible to participate in a study on the drinking and/or cannabis use experiences of young adults. Participation will involve annual in-person sessions, online surveys, and three separate month-long daily data collection periods over the course of two years. Daily data collection includes surveys via a mobile app and wearing a biosensor bracelet that detects your drinking. All data collection is confidential.

Time involved: Participation will involve annual in-person sessions, online surveys, and three separate month-long daily data collection periods over the course of two years.

Compensation: If eligible, you can receive up to $337 over 1 month in the first year, and up to $732 total over the course of the study. Some participants may be eligible for up to $1,026 over the course of the study. You may be compensated though a reloadable spending card or an gift card.

Contact: With any questions, contact [email protected] or 401-863-2485. View the study flyer

See if you may be eligible

Protocol #2883. Principal Investigator: Merrill.
Brown University’s Department of Behavioral and Social Sciences.

Principal Investigator: Sarah Thomas, Ph.D.

Who: We are recruiting teens ages 14-17 with a range of marijuana use—from none to a lot. To be eligible, teens must have a parent or guardian willing to participate (we do not share substance use information with parents), and must not have braces, permanent retainer, or implanted metal.

About: The goal of this study is to understand behavior and brain activity related to how teens make decisions and respond to rewards because we want to understand how decision-making may differ based on teens’ amount of marijuana use.

Time involved: Participants will fill out questionnaires, play special computer games, & complete an MRI brain scan. The study requires 6 hours in 2-3 visits. Participants will receive a brief mental health assessment at no cost and will be compensated for their time.

Contact: For more information about the Teen Decision-making Study, call us at 401-365-4320, email us at [email protected]

Find out more or sign up

Eligible participants must be current cannabis users and at least 18 years old to participate in a confidential Brown University research study on measuring THC levels in breath or saliva. Participants will be able to provide breath or saliva samples from their own residence. Receive up to $45 by completing the study. Follow the link to complete the online screening: Call 401-863-6614 or email [email protected] with any questions.

[Study Protocol # 2109003094]

See if you are eligible

View the Study Flyer