The CAR Study is looking for volunteers ages 18-60 to participate in confidential research at Brown University about cannabis and driving behaviors in daily life.

We are looking for research volunteers in the Providence area who recently entered treatment or are seeking treatment for alcohol use and have used cannabis to participate in a paid confidential research study from Brown University. 

Project MARS is looking for volunteers ages 21-50. Eligible participants must be current alcohol drinkers and cannabis users to participate in a confidential research study on the effects of cannabis and alcohol at Brown University. Participants will complete in-person study sessions and daily surveys in a phone app.

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.