Closing ranks: Ingroup norm conformity as a subtle response to threatening climate change

We tested the hypothesis that climate change threat increases group-based cognition and action tendencies. As ingroups can provide extended primary control, we expected climate change threat to increase conformity with ingroup norms and group protective behavior. In three studies (N = 404), we experimentally manipulated climate change threat (Studies 1–3) and group norm content (Studies 2 and 3). We found that participants under climate change threat more strongly derogated group members who acted against the group’s interests (Study 1). When a specific group norm was made salient, both manipulated (Study 3) and perceived climate change threat (Studies 2 and 3) increased ingroup norm conformity. Importantly, this effect occurred for norms of radical left-wing behavior. This suggests that climate change threat does not necessarily induce a conservative shift. Instead, it elicits group-based defenses whose expression depends on which ingroup and which of its norms are salient