Author Dr. Jeremy Dean states why groups favor members of their own group over others and the importance of group membership in his article “Why Groups and Prejudices Form So Easily: Social Identity Theory” which connects to the film “Identity”by KJ Adams. For example, to understand why groups favor members of their own group over others, Tajfel came up with an experiment. The experiment revealed which group the boys favored: their own group or the other group. Tajfel results showed that the boys favored their own group, but they had nothing to gain or lose. It is better to favor your own group in the real world because you gain benefits. Tajfel also stated that group membership is important. This reveals that group membership forms and defines
