한빛사논문
- 조회1,172
Ryan Hyona, Yoosik Youmb,1, Junsol Kimb, Jeanyung Cheyc, Seyul Kwakd, and Carolyn Parkinsona,e,1
aDepartment of Psychology, University of California, Los Angeles, CA 90095; bDepartment of Sociology, Yonsei University, Seoul 03722, Republic of Korea; cDepartment of Psychology, Seoul National University, Seoul 08826, Republic of Korea; dSeoul Metropolitan Government - Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul 03080, Republic of Korea; and eBrain Research Institute, University of California, Los Angeles, CA 90095
1To whom correspondence may be addressed.
Abstract
People often have the intuition that they are similar to their friends, yet evidence for homophily (being friends with similar others) based on self-reported personality is inconsistent. Functional connectomes—patterns of spontaneous synchronization across the brain—are stable within individuals and predict how people tend to think and behave. Thus, they may capture interindividual variability in latent traits that are particularly similar among friends but that might elude self-report. Here, we examined interpersonal similarity in functional connectivity at rest—that is, in the absence of external stimuli—and tested if functional connectome similarity is associated with proximity in a real-world social network. The social network of a remote village was reconstructed; a subset of residents underwent functional magnetic resonance imaging. Similarity in functional connectomes was positively related to social network proximity, particularly in the default mode network. Controlling for similarities in demographic and personality data (the Big Five personality traits) yielded similar results. Thus, functional connectomes may capture latent interpersonal similarities between friends that are not fully captured by commonly used demographic or personality measures. The localization of these results suggests how friends may be particularly similar to one another. Additionally, geographic proximity moderated the relationship between neural similarity and social network proximity, suggesting that such associations are particularly strong among people who live particularly close to one another. These findings suggest that social connectivity is reflected in signatures of brain functional connectivity, consistent with the common intuition that friends share similarities that go beyond, for example, demographic similarities.
social networks, homophily, fMRI, resting state, functional connectomes
논문정보
- Research article
- 2020년 12월 (BRIC 등록일 2020-12-18)
- 국내(교신)+국외 연구진
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