Table 1. Subject Characteristics.
| fMRI experiments (n=15) | Behavioral experiment (n=6) | |
|---|---|---|
| Gender | Males=15 | Females=3; males=3 |
| Mean age (SD) (years) | 26.7 (5.7) | 25.6 (8.2) |
| Age range | 20–42 | 21–42 |
| Cannabis use (lifetime) | <5 times: 9 subjects; 5–14 times: 6 subjects | Mean use: 150 times |
| Other illicit drug use (lifetime) | Amphetamines, 3 subjectsa; LSD/Psilocybin, 3 subjects;a,b MDMA, 5 subjects;b Cocaine, 1 subject | Cocaine only –1 subject; Cocaine, LSD/Psilocybin, ketamine, MDMA, 1 subject |
| Current tobacco smokers | 7 subjects; mean number of cigarettes smoked/day, 2.92 (SD, 4.9) (range, 0–15/day); 2 subjects smoked >10 cigarettes/day | 3 subjects; mean number of cigarettes smoked/day, 5.0 (SD, 6.3) (range, 0–15/day); 1 subject smoked >10 cigarettes/day |
a
1 subject had experimented with both amphetamines and LSD/Psilocybin.
b
1 subject had experimented with both LSD/Psilocybin and MDMA.