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Intergroup bias

Intergroup bias is the tendency to favor your own group over other groups in Social Psychology. It shows up as in-group favoritism, negative out-group judgments, and unequal treatment.

Last updated July 2026

What is intergroup bias?

Intergroup bias is the tendency in Social Psychology to evaluate your own group more positively than groups you see as outsiders. That can show up as liking, trusting, or rewarding in-group members more, even when the actual evidence does not justify the difference.

The bias starts with social categorization. As soon as people sort others into groups, even by something minor, they often start noticing "us" versus "them." That split can shape attention, memory, and judgment, so the in-group feels familiar and the out-group can seem more distant or more similar to itself than it really is.

A lot of intergroup bias is tied to identity, not just personal opinion. When a group becomes part of how you see yourself, protecting the group can feel like protecting your own status. That is why the bias can appear in everyday choices like picking a teammate, defending a friend group, or assuming your own class, club, or team is more capable.

This concept matters because the bias does not always look like open hate. Sometimes it shows up as subtle preference, like giving more credit to an in-group member, assuming an out-group member is less qualified, or treating the in-group as more deserving of resources. In hiring, promotions, classroom participation, or leadership selection, those small preferences can add up to real inequality.

Intergroup bias also connects to conflict. When groups compete for status, resources, or recognition, the bias often gets stronger because people start interpreting events through group loyalty. But the pattern is not fixed. Social Psych looks at how contact, shared goals, and changing norms can soften bias, especially when people have repeated, meaningful interaction across group lines.

Why intergroup bias matters in Social Psychology

Intergroup bias shows up in Social Psychology whenever you need to explain why people do not judge groups evenly. It gives you a clear way to connect individual perception to bigger patterns like prejudice, discrimination, and conflict between groups.

It also helps you read everyday behavior more carefully. If a manager keeps promoting people from their own network, a student group keeps trusting its own members, or two clubs assume the other side is the problem, intergroup bias may be part of the explanation. The concept helps you separate personal dislike from group-based preference.

In group decision making, intergroup bias can distort choices without anyone noticing. A group may give more weight to familiar voices, dismiss outside ideas faster, or treat in-group mistakes as one-offs while seeing out-group mistakes as proof of incompetence. That makes the term useful for interpreting performance, fairness, and conflict in real situations.

It also connects directly to other core ideas in the course, especially social identity theory and the Contact Hypothesis. Those ideas help explain where the bias comes from and what can reduce it, so intergroup bias is often the middle piece that ties cause and effect together.

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How intergroup bias connects across the course

in-group favoritism

Intergroup bias often shows up as in-group favoritism, which is the actual preference for members of your own group. If a question describes giving your team better treatment, more trust, or extra credit, this is usually the clearest label. Intergroup bias is the broader pattern, while in-group favoritism is one common behavior you can observe.

social identity theory

Social identity theory explains why intergroup bias happens in the first place. People get part of their self-esteem from group membership, so protecting the in-group can feel personal. When the course asks why group loyalty shapes judgment, social identity theory is usually the framework behind the bias.

Contact Hypothesis

The Contact Hypothesis is one of the main ways Social Psychology thinks intergroup bias can be reduced. Regular contact can lower fear and stereotypes, especially when groups meet under equal status and shared goals. It is not just any interaction that works, though. Token contact or forced competition can leave the bias intact.

Stereotyping

Stereotyping and intergroup bias feed each other. Bias makes you notice information that supports your group preference, and stereotypes give that preference a story, like "our group is more competent" or "their group is unreliable." When you see a scenario with broad assumptions about a group, stereotyping is often part of the mechanism.

Is intergroup bias on the Social Psychology exam?

A quiz question or short essay may describe a hiring decision, classroom group project, or team rivalry and ask you to name the bias behind it. Your job is to point out the in-group preference, then explain how it affects judgment, treatment, or resource sharing. If a scenario shows people giving their own group the benefit of the doubt, that is a strong sign of intergroup bias. In a discussion post, you might also connect it to social identity theory or explain how contact between groups could reduce it. The best answers do more than label the term, they show exactly how the group divide changes behavior.

Intergroup bias vs explicit bias

Intergroup bias is the tendency to favor your own group, and it can be subtle or automatic. Explicit bias is openly stated or consciously endorsed prejudice. Someone can show intergroup bias without admitting any bias at all, which makes the distinction useful when a scenario involves quiet favoritism rather than direct hostile statements.

Key things to remember about intergroup bias

  • Intergroup bias is the tendency to favor the in-group and evaluate out-groups less positively.

  • It often starts with social categorization, where people quickly sort others into "us" and "them."

  • The bias can affect choices in hiring, promotion, teamwork, and everyday social interactions.

  • It is linked to social identity, stereotypes, and conflict between groups, not just personal dislike.

  • Social Psychology also looks at ways to reduce it, especially through contact and shared goals.

Frequently asked questions about intergroup bias

What is intergroup bias in Social Psychology?

Intergroup bias is the tendency to favor people in your own group over people in other groups. In Social Psychology, it is used to explain why group membership shapes judgment, treatment, and trust. It can be subtle, like giving the in-group more benefit of the doubt, or more obvious, like discriminating against an out-group.

Is intergroup bias the same as prejudice?

Not exactly. Prejudice is a negative attitude toward another group, while intergroup bias is broader and includes positive treatment of the in-group as well as negative treatment of out-groups. A person can show intergroup bias simply by preferring their own group, even if they do not express an openly hostile prejudice.

What causes intergroup bias?

Social categorization is a big cause, because once people sort others into groups, they often start thinking in terms of group membership. Social identity theory also helps explain it, since people want their own group to seem valuable. Competition, stereotypes, and group norms can make the bias stronger.

How can intergroup bias be reduced?

The Contact Hypothesis is the classic answer here. Meaningful contact between groups, especially when there are shared goals and equal status, can reduce fear and soften stereotypes. Superficial contact does not always work, so the quality of the interaction matters.

Intergroup Bias | Social Psychology | Fiveable