Larimer, Mary ECanning, Jessica Ryan2019-08-142019-08-142019Canning_washington_0250O_19928.pdfhttp://hdl.handle.net/1773/44436Thesis (Master's)--University of Washington, 2019Prevention research has utilized the Prototype Willingness Model (PWM) to understand decision-making surrounding adolescent and young adult drinking. The PWM posits a reasoned pathway (intentions), and a social reaction pathway (willingness) to engage in health-risk behavior. Intentions and willingness to drink can depend on context and varies between and within days. Facets of impulsivity, including negative urgency, sensation seeking and premeditation, have predicted willingness and drinking. It is uncertain whether impulsivity is associated with overall levels or daily variability of intentions and willingness. This study used ecological momentary assessment (EMA) to evaluate how impulsivity influences daily variability in intentions and willingness to drink and whether that variability predicts alcohol use and consequences. Participants (N = 124) aged 15-25 (mean age 18.69; 57.3% female) completed impulsivity at baseline and reported on intentions and willingness to drink 3 times a day on Fridays and Saturdays for 3 consecutive weeks. Results revealed average level of willingness mediated the relationships between premeditation and alcohol use and consequences. Daily variability of willingness mediated the association between negative urgency and consequences but not use. No facets of impulsivity were associated with average level of intentions. Finally, daily variability of intentions mediated the associations between premeditation and both alcohol use and consequences. This study demonstrates the significance of evaluating instability in willingness and intentions to drink along with average levels. Interventions targeting multiple facets of impulsivity may reduce alcohol use and consequences through changes in decision making variables.application/pdfen-USnonealcohol consequencesalcohol useImpulsivityintentionsprototype willingness modelPsychologyPsychologyThesis