sociometry

/ˌsoʊsiˈɑmətri/
noun
  1. The study and measurement of social relationships within a group, often using surveys or tests to see who people prefer to work or spend time with.
    • Sociometry helps researchers understand friendship patterns in a classroom.
    • The teacher used sociometry to find out which students worked best together.
    • The company hired a consultant to apply sociometry and improve team dynamics.