Group memberships and post-traumatic growth: How we connect determines how we recover

This paper examines key processes from the social identity model of traumatic identity change in the context of the aftermath of a natural disaster. It focuses on the roles of (i) group membership gain, (ii) group membership continuity, (iii) social identity revitalisation, and (iv) the severity of natural disaster exposure on post-traumatic growth (PTG) and post-traumatic stress (PTS). Participants: (N = 410, M_age = 53.24 years) comprised adult survivors of the Australian 2019-20 Black Summer bushfires, recruited to complete an online survey via geo-targeted Facebook advertisements. Results: showed that group membership gain was positively correlated with PTG, whilst group membership continuity negatively correlated with PTS, highlighting the different roles played by group gain and continuity in post-trauma recovery. Preliminary evidence for the validity of a new author-developed social identity revitalisation measure was found, which mediated some relationships between group gain and continuity and PTG and PTS. Lastly, the extent that participants were affected by the fires moderated the relationship between group gain and PTS. Specifically, for those most affected, group gain was correlated with lower reported PTS, whilst for those less affected, group gain was correlated with higher reported PTS. We discuss implications for theory and draw attention to the concept of revitalisation, which shows promise as a potentially critical contributor to post-trauma recovery.