Relationship between locus of control and drug effects in users of narcotics, stimulants, hypnotic-sedatives, and hallucinogens.

A test is made of the hypothesis that the subjective effects of narcotics lead to an internal locus of control orientation. No support is evident. Similar findings are given for users of stimulants. As an aside to the major focus of the study, a test of locus of control differences between users of narcotics, stimulants, hypnotic-sedatives, and hallucinogens is given, with no differences being found.