Social identification and social differentiations if to use Teshfel and Turner's categorial grid are based on process of a categorization "we" and "they". Or, according to the well-aimed statement of Porshnev, - "any opposition unites, everyone opposes, the measure of opposition is an association measure.
This statement it illustrates key parameters of positive feeling of identity. It is the only case when Freud used the term "identity" not simply by the way, and in very essential ethnic sense.
In other words, when comparing the ethnic group with others, people most often seek to keep or restore positive group identity. Members of group of the prepotent majority usually have with it no special difficulties.
Children of groups of minority have a tendency to be identified with prepotent group that reflects early awareness of children on existence of a certain social structure, that in society one groups are estimated above, than others.