How prototypical are we compared to them? The role of the group relative prototypicality in explaining the path from...

In two cross-sectional and two experimental studies across both advantaged and disadvantaged group members (N_total = 1980 from two national contexts, UK and Italy), we explored if perceptions of group relative prototypicality may explain the association of positive and negative contact with collective action. Specifically, across studies, we investigated subgroup relative prototypicality with respect to four different common identities (national, supranational, based on humanity, humanity values). In Studies 1-2, among advantaged group members, positive contact was positively associated with collective action intentions via greater relative prototypicality of disadvantaged groups; in Study 2, we also found that negative contact was negatively associated with collective action intentions via decreased relative prototypicality of disadvantaged groups. By contrast, among disadvantaged group members, relative prototypicality did not exert any mediation effects. Experimental Studies 3-4 using advantaged group member participants generally provided causal evidence that positive (imagined) contact increases relative prototypicality of the disadvantaged group (Study 3), and that relative prototypicality increases collective action (Study 4).