How do social networks cluster when groups interact, not just pairs?

When three or more people interact simultaneously in a group, do they cluster by similarity like pairs do? This survey catalogs measures and models for detecting homophily (birds of a feather) and heterophily (opposites attract) in hypergraphs—networks with group-level ties. The authors show that group-level mixing patterns differ fundamentally from pairwise ones, offering methodological guidance for studying team formation, collaboration networks, and real social systems.