But that’s not all. Deutsch and Gerard coined the term ‘groupiness’ to describe how cohesive a particular group is – how much its members tend to conform. In sociology the term for this is entitativity, essentially meaning the degree to which the group works as a single entity. We tend to divide the world into ‘in-groups’ and ‘out-groups’, meaning those that we identify ourselves as being a part of, and everyone else. For example, your in-group may be your university alma mater, while the out-group may include students from a rival institution.
