Impulsivity and Problem Drinking in College: Examining the Mediating Role of Sex-Related Alcohol Expectancies and Alcohol Use at Sex

Background: Dispositional impulsivity has been consistently implicated as a risk factor for problem drinking among college students and research suggests that this relationship may be explained in part by alcohol expectancies. A subset of alcohol expectancies, sex-related alcohol expectancies, is particularly linked to problem drinking among college students. The acquired preparedness model of risk postulates that people with dispositional impulsivity develop stronger sex-related alcohol expectancies, are subsequently more likely to drink at problematic levels in sexual situations, and thus, engage in more problem drinking. Objectives: Using this model, the current study examined whether sex-related alcohol expectancies and alcohol use at sex mediated the relationship between impulsivity and problem drinking among college students. Methods: College students (N = 101) completed self-report measures of alcohol use, sex-related alcohol expectancies, and five dimensions of impulsivity: negative urgency, positive urgency, sensation seeking, lack of premeditation, and lack of perseverance. Results: Two facets of impulsivity—sensation seeking and lack of premeditation—provided unique contributions to problem drinking. Sex-related alcohol expectancies significantly mediated the effects of lack of premeditation and sensation seeking on problem drinking. In support of the acquired preparedness model, the relationship between the impulsivity traits and problem drinking was serially mediated by sex-related alcohol expectancies and alcohol use at sex. Conclusions: Results suggest that sensation seeking and lack of premeditation continue to be areas of intervention for problem drinking among college students, and implicate sex-related alcohol expectancies as an area of intervention for alcohol use at sex and problem drinking.