Threats to personal control fuel similarity attraction.

We propose that experiencing a lack of personal control will increase people's preferences for self-similar others and that this effect would be explained by a greater need for structure. Our hypotheses received support across 11 longitudinal, experimental, and archival studies composed of data from 60 countries (5 preregistered studies, = 90,216). In an analysis of cross-country archival data, we found that respondents who indicated a lower sense of personal control were less likely to prefer to live with neighbors who had a different religion, race, or spoke a different language (Study 1). Study 2 found that participants who perceived lower (vs. higher) personal control indicated greater liking for coworkers who they perceived to be more self-similar across a wide range of characteristics (e.g., gender, personality). Studies 3a and 3b, two live-interaction experiments conducted in the United States and China, provided additional causal evidence for control-motivated similarity attraction. A causal experimental chain (Studies 4a to 4c) and a manipulation-of-mediation-as-a-moderator study (Study 5) provided evidence for the mediating effects of the need for structure. Study 6, a longitudinal study with Chinese employees, found that workers who reported perceiving a lower (vs. higher) sense of personal control preferred more self-similar coworkers, and this effect was mediated by a greater desire for structure. Finally, exploring downstream consequences, Studies 7a and 7b found that control-motivated similarity attraction was associated with a greater preference for homogenous (vs. diverse) groups. These findings highlight how the fundamental motive for personal control shapes the structure of social life.