Social Identity Theory: Seeking In-group Favoritism and Out-group Derogation
Human nature seems to involve seeking belonging and rejecting outsiders. Social identity theory provides insight into this fundamental aspect of human psychology. Originally proposed by social psychologists Henri Tajfel and John Turner in the 1970s, social identity theory posits that people tend to classify themselves and others into various social categories, such as organizational membership, religious affiliation, gender, and age cohort (Tajfel & Turner, 1979). According to the theory, a large part of an individual’s concept of self is derived from perceived membership in relevant social groups. Groups that are part of their self-concept are considered the in-group, whereas groups they do not identify with are the out-group.
Social identity theory maintains that people are motivated to achieve positive self-esteem, and that a key source of self-esteem is favorable comparisons between the in-group and relevant out-groups (Tajfel & Turner, 1986). Therefore, individuals will tend to engage in in-group favoritism by evaluating their own group positively and exhibiting bias toward their group members. They will also engage in out-group derogation by negatively evaluating other groups and showing prejudice against out-group members. Tajfel and Turner outlined a minimal group paradigm experiment that demonstrated how even arbitrarily assigned and meaningless groups could produce in-group bias and out-group discrimination, indicating that social categorization and group membership alone are sufficient motivating factors underlying intergroup behavior and relations (Tajfel, Billig, Bundy, & Flament, 1971).
Numerous subsequent studies have found support for the core propositions of social identity theory across different cultures and contexts. For example, research on sport fan identification found that stronger identification with a favorite sports team leads fans to make more favorable evaluations of their team and display more hostility towards rival teams (Wann & Branscombe, 1993). Studies of organizational behavior found that employees engage in overt favoritism towards their own work units over other units (Riordan & Shore, 1997). Experiments manipulating group membership have consistently replicated the in-group bias and out-group discrimination predicted by social identity theory, even when group assignments were completely random (Diehl, 1990). Further evidence comes from research looking at intergroup relations between nations, ethnicities, genders, and other socially meaningful categories (Brown, 2000).
Social identity theory proposes that there are two main routes through which individuals can obtain positive self-esteem from their group memberships: social creativity strategies and social competition strategies (Tajfel & Turner, 1986). Social creativity refers to ways of positively redefining the attributes and perceptions of the in-group to ensure favorable comparisons. Some potential tactics include emphasizing dimensions on which the in-group is superior, making internal comparisons within the in-group to highlight variability, and derogating dimensions on which the out-group excels to diminish its advantages. Social competition involves actively striving to achieve higher status for the in-group relative to other groups through means like direct conflict, trying to dominate out-groups, and promoting public policies that benefit the in-group at the expense of others (Tajfel & Turner, 1979).
The theory predicts that when social identity or group status is threatened, individuals and groups are more likely to engage in defensive intergroup behaviors aimed at regaining positive distinctiveness. For instance, experiments simulating status loss found that participants made increasingly negative evaluations of high-status out-groups (Rabbie, Schot, & Visser, 1989). Surveys of Americans during periods of economic insecurity found they expressed more hostility towards immigrants and expressed support for restrictive immigration policies (Stephan, Ybarra, Martinez, Schwarzwald, & Tur-Kaspa, 1998). During times of crisis like war and terrorism, nations tend to see a spike in nationalistic sentiment and othering of antagonistic out-groups as a means of bolstering collective self-worth (Druckman, 1994).
Overall, considerable evidence supports the core propositions of social identity theory concerning psychological motivations underlying intergroup relations. The theory provides explanatory value regarding phenomena as diverse as sports fandom, workplace dynamics, interethnic attitudes, and international conflicts. The theory’s insights help elucidate why group memberships are central features of social identity and why people exhibit ingroup bias and outgroup discrimination. While additional motivations certainly also impact intergroup patterns, the findings regarding social identity theory’s proposed esteem-seeking mechanisms through in-group favoritism and out-group derogation bolster its status as a seminal social psychology model. Future research continues to build on and refine social identity theory, using it as a conceptual framework for understanding the roles of self-concept, social categorization, and intergroup behavior in diverse contexts. The theory remains highly influential due to its ability to provide a parsimonious yet powerful explanation of basic psychological mechanisms motivating core aspects of human social dynamics.
Andrew Stroud