A threat in the network: STEM women in less powerful network positions avoid integrating stereotypically feminine peers.

Integrating social identity threat and structural hole theories, this work examines how social network positions affect group-based identity threats. For individuals less well positioned to bridge (or "broker") relations between unconnected friends, stigma-by-association concerns may constrain affiliation with stereotypic targets. Three experiments (Ns = 280, 232, 553) test whether women (vs. men) in male-dominated STEM (vs. female-dominated) majors avoid befriending a female target with feminine-stereotypic (vs. STEM-stereotypic) interests. Only STEM women with less brokerage (i.e., less ability to manage introductions to unconnected friends) in their existing friendship networks avoided befriending (pilot experiment) and socially integrating (Experiments 1 and 2) feminine- (vs. STEM-) stereotypic targets, despite standardized target similarity and competence. STEM women in particular anticipated steeper reputational penalties for befriending stereotypically feminine peers (Experiment 2). Social identity threat may lead women in STEM-especially those lacking brokerage-to exclude stereotypically feminine women from social networks, reinforcing stereotypes of women and STEM fields.