社会认同理论起源于Henri Tajfel的早期作品，该作品探讨了感性过程导致社会刻板印象和偏见的方式。这导致了Tajfel及其同事在20世纪70年代早期进行的一系列研究，这些研究被称为极小组研究。在这些研究中，参与者被任意分配到不同的群体。然而，尽管他们的团体成员没有意义，但研究显示，参与者倾向于他们被分配到的团体 – 他们的团体 – 而不是团体成员，即使他们没有从团体成员中获得个人利益而且没有与任何一组成员的历史。研究表明，群体成员资格非常强大，只需将人们分组，就足以让人们从群体成员身份来看待自己。此外，这种分类导致了群体偏袒和群体外歧视，表明群体之间可能存在任何直接竞争的冲突。
The theory of social identity originated from Henri Tajfel’s early work, which explores the ways in which perceptual processes lead to social stereotypes and prejudices. This led to a series of studies conducted by Tajfel and his colleagues in the early 1970s, which were called polar group studies. In these studies, participants were arbitrarily assigned to different groups. However, although their group members are meaningless, studies have shown that participants tend to be assigned to groups – their groups – rather than group members, even if they do not derive personal benefits from group members and do not have any group The history of members. Studies have shown that group membership is very powerful, and simply grouping people is enough to allow people to look at themselves from group membership. In addition, this classification leads to group bias and extra-group discrimination, indicating that there may be any direct competition between groups.