Inclusion Criteria:  Right-handed Prior MJ users (has used MJ at least once in the past year, but no more than 1x/month in the past 12 months) Medically healthy (as determined by medical history and treatment) Adequate comprehension of English in order to complete study materials Acceptable birth control method for women (i.e., no copper IUD or any device that is not MRI safe)  Exclusion Criteria:  Participant currently uses psychoactive medications or substances Psychiatric diagnoses (determined by DSM-V) Participant heavily or regularly uses MJ (more than 1x/month in the past year) Current or past substance dependence (including MJ) Positive urine toxicology screens Positive pregnancy screens MRI contraindications (e.g., heart pacemaker)