The effects of being categorised: The interplay between internal and external social identities

In this chapter, we consider the independent and interactive effects of internal categorisations (how people see themselves) and external categorisations (how they are categorised by others) on social behaviour. Our point of departure is that people do not necessarily accept external categorisations that are imposed upon them (regardless of whether these refer to artificially constructed or naturally occurring groups) and that this affects their willingness to invest in the group. We first outline different reasons people may have to behave in line with externally imposed group memberships. Subsequently, we examine how self-presentation motives may interfere with identity expression, as people consider different social norms, different audiences, and the psychological costs associated with the management of their social identities. We conclude by delineating the conditions under which external categorisations can be internalised by targets, depending on the interplay of multiple identities as well as the way people are treated by others.