Discrimination and Substance Use: Examining the Moderating Role of Impulsivity among Racial-Ethnic Minority Adolescents

Background: Research on substance use among racial-ethnic minority populations notes that discrimination experiences predict substance use outcomes. Individual-level factors, such as impulsivity, are also known risk factors for substance use. However, little is known about the direct and interaction effects between discrimination experiences and impulsivity among racial-ethnic minority youth. The current study examines the effects of perceived experiences of discrimination on alcohol and marijuana use among racial-ethnic minority youth, and whether individual differences in impulsivity traits help to further understand potential risk for substance use. Methods: Participants were 112 racial-ethnic minority adolescents (Mage = 15.27; African American, Hispanic, Multiracial, Native American/Alaskan Native, or Other). Adolescents completed self-report measures of perceived experiences of discrimination, alcohol and marijuana use (past year occurrence and problematic use), and five impulsivity traits (i.e., sensation seeking, lack of planning, lack of perseverance, negative urgency, and positive urgency). Results: A significant main effect of perceived discrimination on problem marijuana use was found, as well as a significant main effect of lack of premeditation on current marijuana use. Several marginally significant main effects emerged for alcohol use and problem alcohol use (i.e., positive urgency and sensation seeking, respectively). Conclusion: While no significant moderation effects emerged, marginal findings suggest a potential interactive effect of discrimination and impulsivity traits on problem alcohol and marijuana use among racial-ethnic minority youth. Further research is needed in this area to replicate findings, which is critical to informing effective intervention and prevention efforts for this population of youth.