Study seeks adolescents enrolled in substance use treatment for marijuana

Researchers at the Johns Hopkins University are seeking adolescents, ages 13-18, who are enrolled in substance use treatment for marijuana use to participate in a new research study that seeks to understand how brain function changes during treatment.

The study entails three visits (three to six hours each), two of which will involve MRI scans. There is an optional follow-up study involving three additional 30- to 60-min study visits. If you are interested in participating or would like further information, call/email: 443-900-3404 or or

You will be paid $160 for your participation. Participants completing the main study plus the follow-up will be paid $250.

The research study uses a brain imaging technique called magnetic resonance imaging. During the study you will perform cognitive tests/games and answer questions about your life, behaviors, and stressful events.

No medications, no blood draws are involved.

Participants under the age of 18 years will be enrolled only with the consent provided by a parent or guardian.

You may be eligible if you:

  • Are 13-18 years old
  • Are receiving mental health treatment OR substance use treatment for marijuana use
  • Have no medical contraindications to completing an MRI scan

All emails/calls are confidential.

Study #: IRB00093540, PI: Christopher Hammond (Department of Psychiatry)