The investigators will also evaluate mediators of intervention effects. Additionally, the investigators will follow procedures to assess mediation. Mediation will test indirect effects using the AB products method where A will represent effects of intervention contrasts by time interactions on mediators (expression of guilt and change thought). B will represent the associations of mediators on subsequent drinking outcomes. Both A and B paths will control for baseline outcomes. Evaluation of hypotheses regarding the moderation effect will test whether individual differences in guilt-proneness interact with intervention contrasts. These will be tested by expanding the above model to add main effects and product terms of proposed moderators with intervention contrasts.