Who has different-race friends, and does it depend on context? Openness (to other), but not agreeableness, predicts lower racial homophily in friendship networks.

People form relationships with people from their own racial groups, a phenomenon called , which reduces interracial contact and exacerbates inequality and prejudice. Although viewed as arising from environmental factors, we argue that racial homophily also involves individual choice and, thus, personality factors. We address three major issues. First, are interpersonal concerns (Agreeableness) and intergroup concerns (Openness) differentially relevant to cross-race friendships? Second, are current conceptions of Openness sufficient, or do we need lower-level facets more attuned to intergroup concerns? Third, can we specify the interplay between personality and contextual factors in different settings? Across four studies (total N = 1,820), failed to predict more cross-race friendships, in both self- and peer reports, suggesting that interpersonal kindness was not sufficient to overcome racial homophily. In contrast, Openness and (O2, a new social facet of Openness) consistently predicted cross-race friendship. However, the O2 facet had the stronger and only unique effect, suggesting it is the "active ingredient." High-O2 individuals had an almost equal 1:1 ratio of same-to-different-race network members, whereas low-O2 individuals had 4:1 same-race. These results held for both college students and middle-aged adults, both friends and new acquaintances in the network, and both networks established before and at a diverse university. Finally, when moving to a more diverse environment, high-O2 individuals seemed to take advantage of the new environmental affordances, adding more different-race members to their networks. Overall, these studies advance understanding of person-environment transactions, showing how personality traits matter to the structure of people's social networks. (PsycInfo Database Record (c) 2022 APA, all rights reserved).