Development and refinement of the mobile anger reduction intervention for veterans with posttraumatic stress disorder.

Problematic anger is commonly reported among veterans with posttraumatic stress disorder (PTSD) and is associated with numerous psychosocial impairments. There is a clear need to develop innovative and effective anger interventions. One of the cognitive mechanisms associated with anger is the hostile interpretation bias, which is the tendency to interpret ambiguous interpersonal situations as hostile. The current study presents a successive cohort design methodology to develop and refine a mobile treatment application, entitled Mobile Anger Reduction Intervention (MARI), which uses interpretation bias modification techniques to modify hostile interpretation bias.Two cohorts (total N = 13) of veterans with PTSD and problematic anger used the MARI application for 4 weeks. After each cohort, qualitative and quantitative data were used to modify the MARI application. The intervention is described, as well as the qualitative and quantitative findings and subsequent changes made to the mobile application based on participant feedback.Treatment adherence was high (90% of participants completed all sessions). Participants reported that they found the treatment helpful and easy to use and experienced improvements in hostile interpretation bias and problematic anger.This study demonstrates the utility of a successive cohort treatment design for the development of mobile interventions. (PsycInfo Database Record (c) 2023 APA, all rights reserved).