Researchers at Brown University’s School of Public Health are actively recruiting volunteers for six distinct cannabis-related studies through the Center for Alcohol and Addiction Studies.

Each study focuses on specific age groups and patterns of cannabis or substance use, with compensation offered for participation. Below is a look at all six.

BEST Project

Volunteers aged 18-25 who have used cannabis in the past month are eligible for the Behavioral Economic Study of microTransitions (BEST Project). This is a longitudinal, three-year study investigating cannabis behaviors and life changes during early adulthood. Participants may earn up to $915 for full participation.
Key facts: age 18-25, must have used cannabis in the past month, long-term involvement.

CAR Study

The CAR Study targets adults aged 18-60 who are current cannabis users and frequent drivers. The focus: driving behaviours in daily life among cannabis users. Up to $340 compensation is offered.
Key facts: age 18-60, current cannabis use + frequent driving, observational research into cannabis+driving.

Project CannTalk

Project CannTalk is recruiting adults ages 45-74 (according to the main page) who currently use cannabis. The study explores cannabis behaviour in daily life, with in-person baseline screening at the Providence research centre. Compensation is up to $570.
Key facts: age 45-74, current cannabis users, about 8.5 months participation, in-person baseline plus follow-ups.

Project DREAMS

This study enrols adults aged 18-34 who use cannabis and have a history of depression. Participants will complete questionnaires, brief medical screening, two in-person lab sessions, biological samples, and daily mobile phone surveys. Compensation is up to $451 plus entry to a prize drawing.
Key facts: age 18-34, cannabis use + history of depression, mixed in-lab and mobile-survey participation.

Project LINC

Project LINC invites adults over 18 who are in the Providence area, recently entered treatment or are seeking treatment for alcohol use and have used cannabis. Participation involves interviews, questionnaires, use of an alcohol sensor bracelet and smartphone reporting. Compensation is up to $710.
Key facts: adults 18+, recent alcohol-treatment entry or seeking treatment, plus cannabis use, mixed remote/ in-person.

Project MARS

Project MARS seeks adults aged 21-50 who drink alcohol currently and use cannabis. It examines the combined effects of cannabis and alcohol. Participants complete in-person sessions and daily smartphone surveys. Compensation is up to about $572.
Key facts: age 21-50, current alcohol + cannabis use, in-person + app-based daily surveys.

To find out more about these studies or to take part in a screener to see if you’re eligible, click here.