Social Identity Theory (SIT)
A psychological theory that describes how a person’s sense of who they are (self-concept) is shaped by their membership in social groups.
SIT explains phenomena like prejudice, discrimination, and in-group bias, demonstrating how group membership can shape behavior even in the absence of resource competition.
Social Categorization
Social Categorization
The process of organizing individuals into groups based on shared characteristics (nationality, gender, or even trivial factors like favorite colors.)
Social categorization forms the basis of in-groups ("us") and out-groups ("them"). We tend to identify with groups that are more most salient to us. This distinction influences human behaviour and perceptions.
Social Comparison
- The process of evaluating one’s own group (in-group) against other groups (out-groups) to highlight differences and enhance the in-group’s perceived status.
- Groups aim to appear superior to others, which boosts self-esteem.
- In-group favouritism is where we are more likely to identify with those in our group, over others.
Positive Distinctiveness
- The desire to make one’s in-group distinctively and positively different from out-groups.
- This can result in biased judgments and preferential treatment for in-group members.
Key Studies
Case studyTajfel et al. (1971), The Minimal Group Paradigm
Aim:
To investigate the effects of social categorization on intergroup behavior, specifically the emergence of in-group favoritism and out-group discrimination.
Participants:
64 male students (aged 14–15) from a school in Bristol, England, assigned to eight groups of eight.
Procedure:
- Stage 1: Participants estimated the number of dots on a screen and were categorized as "overestimators" or "underestimators" (arbitrarily assigned).
- Stage 2: Participants allocated points (convertible to money) using a matrix, deciding rewards for anonymous members of in-groups and out-groups.
Results:
- Participants consistently favored in-group members, even at a personal cost or reduced group reward.
- The mean choice for in-group members in different-group matrices was 9.2, compared to the fairness point of 7.5.
Conclusion:
In-group favoritism and out-group discrimination can arise from trivial group distinctions, supporting the claims of SIT.
Evaluation:
- The random assignment to groups minimized potential confounding factors. This strengthens the study's internal validity.
- Subsequent research have consistently replicated similar findings and patterns of in-group favoritism. This reinforces the reliability of Tajfel’s findings.
- The study has low ecological validity as the laboratory setting and artificial design do not accurately reflect real-world group dynamics.
- The sample consisted only of male, British students, making it difficult to generalize findings across different age groups, genders, and cultures.
- Participants may have possessed demand characteristics, guessing the study’s purpose and behaving in ways they believed were expected of them (e.g. favoring their in-group). This could reduce the study’s validity.
Park and Rothbart (1982), Sororities and In-Group Bias
Aim:
To examine in-group bias and the out-group homogeneity effect among sorority members.
Participants:
90 sorority members from the University of Oregon.
Procedure:
Participants rated their own sorority and two others on 10 characteristics (8 positive and 2 negative). They assessed how well these traits represented their group versus others.
Results:
- For positive characteristics, participants rated their own sorority more favorably than others.
- For negative characteristics, they attributed these more to out-groups.
- Participants also perceived out-group members as more similar to each other than in-group members.
Conclusion:
Findings support SIT’s claims about in-group favoritism, positive distinctiveness, and the out-group homogeneity effect, demonstrating how group membership affects perception and behavior.
Evaluation:
- The study's use of naturally occurring social groups, increases its ecological validity. Participants already had a strong identification with their groups, making the findings more applicable to real-world intergroup dynamics.
- Subsequent research have consistently replicated similar findings and patterns of in-group favoritism. This reinforces the reliability of Tajfel’s findings.
- The sample consisted only of sorority members at a single university, making it difficult to generalize findings to other populations, such as non-Greek students and/or men.
- There may have been a potential for social desirability bias. Participants may have responded in a way that aligns with social expectations within their sororities rather than their true beliefs. This lowers the validity of the findings.
- Naturalistic settings introduce potential confounding variables (e.g. pre-existing biases, friendships, and status differences), which may have influenced the results.
