Adapting and Piloting Behavioral Activation for Veterans With Alcohol Use Disorder and Posttraumatic Stress Disorder

The goal of this clinical trial is to compare an adaptation of Behavioral Activation, a behavioral intervention, to Relapse Prevention treatment, another behavioral intervention, in a sample of U.S. military veterans with co-occurring alcohol use disorder (AUD) and posttraumatic stress disorder (PTSD). The primary aims of this study are to: 1. Adapt Behavioral Activation to treat veterans with AUD/PTSD, 2. Evaluate the feasibility, acceptability, and preliminary effects of Behavioral Activation for AUD/PTSD, and 3. Explore geospatial analysis as a new method for measuring AUD/PTSD recovery. Participants will complete self-report and interview measures immediately before and immediately after treatment. Participants will also be asked to participate in passive geospatial assessment for 14-day periods immediately before and immediately after treatment. Participants will be randomized to treatment condition, which involves 8 sessions of either Behavioral Activation or Relapse Prevention, delivered individually by a trained study therapist.