The article is devoted to the review of feacheres of a process of social categorization,its object and functions. The specific of use of this process in main theories of psychology of social cognition is under the consideration.
The article discusses the perception of social groups, in particular, their entitativity. Different approaches to determining the entitativity of the social group are reviewed. A parallel between the perception of the entitativity of the group and assignation of different levels of activity to the group is declared.