‘We Remember Them’: A Mixed Methods Study of Posttraumatic Growth, Collective Efficacy, and Agency among Survivors of Mass Violence in Isla Vista, California

ABSTRACT Mass violence in the United States has been shown to cause trauma for survivors. These events may also create for survivors the experience of posttraumatic growth (PTG), the facets of which include personal strength, appreciation for life, new possibilities in life, spiritual change, and enhanced relationships with others. However, the role of collective efficacy and agency in the development of PTG following mass violence remains unknown. The purpose of this study is to assess the relationship between PTG and experiences of collective efficacy and agency among survivors of the Isla Vista, California tragedy of 2014. The mixed methods objective was to explore the interpretive context within which the agency and collective efficacy experiences occurred. Quantitative data collected in a questionnaire (n = 166) were used to inform the collection of qualitative interview data (n = 12). Participating in therapy, organizing community events, and making the decision to either leave or stay in Isla Vista positively correlated with PTG based on hierarchical regression analysis. Themes of personal agency, the importance of role, and participating in collective action emerged from interviews. This study offers unique methodological approaches to using mixed methods data to understand the experiences which contributed to PTG among survivors of a mass shooting.