Homophily is the notion that humans tend to preferentially interact and connect with individuals who are like them in some way. In other words, it’s the idea that “birds of a feather flock together.” While traditional research focuses on measuring homophily from the perspective of two-way relationships, such as ones encoded by friendship links in a social network, many human interactions are inherently group interactions and standard tools for measuring homophily do not apply in these settings.
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Source: Phys.org