Nice or smart? Task relevance of self-characteristics moderates interpersonal projection

Two studies investigated the impact of trait relevance to a specific task on peopleʹs projection of their characteristics onto a cooperative partner. We either measured (Study 1) or manipulated (Study 2) the relevance of a trait to a specific cooperative task. In both studies, participants first rated themselves on a list of traits. Then they imagined completing a cooperative task with an unknown partner. Finally, they rated the partner on the same list of traits. In Study 1, we found partner ratings to be positively influenced by self ratings and the idiosyncratic measure of trait relevance. In Study 2, participants rated the self and the partner on competence and warmth traits while completing an intellectual or a social task. We found partner ratings to be positively influenced by self ratings more on competence than on warmth in the intellectual task, but more on warmth than on competence in the social task. These results suggest that people project onto others in a way that maximizes their chances to succeed in cooperation.