A social group to which you belong. A social group to which you do not belong. Situations, cognitions, beliefs, and feelings that arise when people from different groups interact with or think about each other. A diffuse but interrelated set of social psychological theories about when and why individuals identify with and behave as a part of social groups. Key assumption: we all have a need for positive self regard. How do we achieve this positive self regard: via our own achievements, via identification with the achievements of the social groups we belong to. Four main components of social identity theory: categorization. People naturally group other social objects into groups. Why do we categorize people into groups: old way of thinking. We have limited cognitive resources that must be conserved. Categorize people on the basis of shared features. Ingroups and outgroups formed on trivial, highly context- specific features. Creating ingroups and outgroups from the most minimal of conditions.