On the question of pre-existing personality differences between users and nonusers of drugs

This study represents a beginning attempt to investigate the possible existence of predrug usage, personality differences between users and nonusers of drugs. Ss were male college students: 30 heavy marijuana (multiple drug) users, 30 light marijuana users, and 30 nonusers were compared on the results of the Gordon Personal Profile administered prior to the use of any drugs. Significant differences were found on two of the personality scales on this instrument.