Prediction of College Drug Use from Personality and Inner Experience

Abstract

The purpose of this study was to determine the extent to which subjects comprising substance use criterion groups (nonusers, alcohol only users, marijuana only users, polydrug users) could be differentiated on the basis of theoretically relevant personality and inner experience constructs. The test battery included variables from the domains of needs, daydreaming and mental style, optimal level of stimulation, and locus of control. Separate stepwise discriminant analyses were computed for males and females in order to predict drug-use pattern. The analyses were replicated, and the best set of predictor variables was used to predict classifications in different samples. The results indicate that it is possible to differentiate among the criterion groups in a statistically reliable manner on the basis of well-conceived assessment instruments with an accuracy of 60 to 65%. The consistency of the obtained discriminant results across four different samples suggests that rather than seeking some superordinate personality trait to differentiate substance users from nonusers, a general cluster of variables which may be described under the rubric “hang loose ethic” will best separate the groups.