Where and with whom does a brief social-belonging intervention promote progress in college?

A promising way to mitigate inequality is by addressing students' worries about belonging. But where and with whom is this social-belonging intervention effective? Here we report a team-science randomized controlled experiment with 26,911 students at 22 diverse institutions. Results showed that the social-belonging intervention, administered online before college (in under 30 minutes), increased the rate at which students completed the first year as full-time students, especially among students in groups that had historically progressed at lower rates. The college context also mattered: The intervention was effective only when students' groups were afforded opportunities to belong. This study develops methods for understanding how student identities and contexts interact with interventions. It also shows that a low-cost, scalable intervention generalizes its effects to 749 4-year institutions in the United States.

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.