(other than marijuana in the case of the marijuana smokers), and no subject in either group reported use of any illicit substance greater than 5 times in their lives. However, the chronic, heavy marijuana smokers reported using alcohol more days per month (9.6 days) than the non-marijuana smoking control subjects (4.0 days). This difference was statistically significant (p < 0.05), yet there were no significant differences between the groups for the number of days intoxicated in the past month (chronic heavy marijuana smokers = 4.8 days/month; non-marijuana smoking control subjects = 2.3 days/month), and no subject in either group met diagnostic criteria for alcohol abuse or dependence. With regard to clinical state, as seen in Table 2, no significant between-group differences were detected for the Beck Depression Inventory (BDI), Positive and Negative Affect Scale (PANAS), or Profile of Mood State (POMS), suggesting that the samples were equally matched on clinical state at the time of testing. No subject in either study group demonstrated clinically elevated scores on the PANAS, POMS, or the BDI. On the Beck Depression Inventory (BDI), all subjects within the non-marijuana smoking control subjects scored within the minimal range, as did all but one of the chronic,
