Study participation will involve:
· A 3-hour screening evaluation to determine eligibility.
· A 1.5-hour visit to get trained on study tasks.
· If you are eligible, 7 study session where you use alcohol and cannabis, either alone or both at the same time. Each session lasts about 10 hours in the lab and are spaced about 1 week apart.
· Please note that the 2 screening visits and 7 study sessions must take place during weekdays and will occur at the Johns Hopkins Bayview Medical Center in Baltimore, Maryland