Prejudice and Discrimination

students, imagine walking into a new school, team, or workplace and being judged before you even speak. That quick judgment can shape how people treat you, what opportunities you get, and how safe you feel. In psychology, these experiences are studied through the ideas of prejudice and discrimination. They matter because relationships do not happen in a vacuum 💬—they are shaped by beliefs, emotions, social identity, and power.

In this lesson, you will learn how psychologists define prejudice and discrimination, how they are connected, and why they matter in the broader study of human relationships. You will also see how research helps explain why people sometimes favor their own group, fear other groups, or act unfairly. By the end, you should be able to explain the key terms, apply them to real-world examples, and connect them to IB Psychology SL expectations.

Understanding prejudice, discrimination, and stereotypes

Prejudice, discrimination, and stereotypes are related, but they are not the same thing.

A stereotype is a simplified belief about a group of people. For example, someone may think all teenagers are irresponsible or that all athletes are popular. Stereotypes can be positive, negative, or neutral, but they are often unfair because they ignore individual differences.

Prejudice is an attitude or feeling, usually negative, toward a person or group based on group membership. It has an emotional component. A person may feel dislike, fear, or suspicion toward another group even if they have never interacted with anyone from that group.

Discrimination is behavior. It refers to actions that treat people unfairly because of group membership. For example, refusing to hire someone because of their ethnicity is discrimination. If prejudice is a feeling, discrimination is the action that may follow.

A helpful way to remember the difference is this:

$- stereotype = belief$

• prejudice = feeling or attitude

$- discrimination = behavior$

These ideas are connected, but one does not always lead to the others. Someone may hold a stereotype but not act on it. Another person may discriminate because of social pressure, even if they do not personally hold strong prejudice. IB Psychology values this distinction because it helps explain how attitudes and behavior can differ in real life.

For example, students, if a student assumes that “girls are not good at math,” that is a stereotype. If the student feels that girls are less capable, that is prejudice. If the student gives boys more attention in class or discourages girls from joining an advanced math club, that is discrimination.

Why prejudice happens: social identity and group processes

One major explanation comes from social identity theory, developed by Henri Tajfel and John Turner. This theory says that people divide the social world into groups, such as “us” and “them.” We often gain part of our self-esteem from the groups we belong to, such as a sports team, nationality, religion, or school house. Because of this, people tend to favor their own group, called the in-group, and may view other groups, called the out-group, less positively.

This process can lead to in-group bias, where people judge their own group more favorably than others. It does not always require deep conflict. Even when groups are formed randomly, people often still show preference for their own side. In Tajfel’s minimal group studies, participants were assigned to groups based on trivial criteria, yet they still tended to allocate more rewards to members of their own group. This suggests that simply categorizing people can trigger bias.

Another useful idea is social categorization. Humans simplify the world by placing people into categories. While this helps us process information quickly, it can also lead to overgeneralization. Once someone is placed in a category, the brain may ignore personal details and rely on stereotypes instead.

A real-world example is school cliques. If a group of students labels another group as “weird,” “snobby,” or “lazy,” those labels can affect friendship choices, trust, and teamwork. Over time, these group-based judgments can become prejudice and even lead to discrimination.

The role of conformity, norms, and power

Prejudice is not only about personal beliefs. It is also influenced by the social environment. People often conform to group norms to avoid rejection or to be accepted. If a peer group uses biased jokes or makes negative comments about another group, individuals may join in even if they do not fully agree. This can create a cycle where prejudice becomes normal in a group.

Norms are shared rules about behavior in a group. If the norm in a workplace or classroom is inclusive and respectful, prejudice is less likely to be expressed openly. If the norm tolerates exclusion or unfairness, discrimination becomes more likely.

Power also matters. Groups with more social, economic, or political power can more easily shape laws, opportunities, and public opinion. Discrimination often reflects power imbalances because it limits access to education, housing, jobs, or safety. This is why prejudice is not just a private attitude; it can have large social consequences.

For example, students, if a school club only allows certain students to join based on appearance or background, the club is not just being rude—it is exercising exclusionary power. In society, discrimination can be even more harmful when it affects healthcare, policing, or employment.

Research methods and IB application

IB Psychology expects you to connect theory with evidence. Prejudice and discrimination can be studied using experiments, observations, interviews, and surveys. Psychologists often examine how people behave in controlled settings to test whether group labels influence judgment.

A classic method is the laboratory experiment, where researchers manipulate one variable and measure another. In studies of prejudice, a common independent variable might be group membership, and the dependent variable might be how fairly participants divide resources, rate a person, or choose a partner.

A key strength of experiments is control. Researchers can isolate specific causes, such as whether seeing an “in-group” label changes decisions. A limitation is that real-life prejudice is complex, and laboratory settings may not fully represent everyday life.

Another IB-relevant approach is to use scenario-based judgments. For example, participants might read identical descriptions of two job candidates, with only the name or group identity changed. If the candidate from one group is rated more favorably, researchers can infer bias.

This is important because discrimination is sometimes subtle. It may appear in hiring decisions, classroom expectations, or media representation. Even when people claim to be fair, hidden biases can affect behavior.

One important study often discussed in this area is by Dovidio and Gaertner, who found that people may appear nonprejudiced on the surface while still showing bias in ambiguous situations. This helps explain why discrimination can continue even in societies where overt prejudice is less openly accepted.

Prejudice in everyday relationships

Prejudice and discrimination are directly relevant to psychology of human relationships because they influence how people form, maintain, or break social bonds. Trust, attraction, cooperation, and conflict are all affected by group-based judgments.

In friendships, prejudice can prevent people from getting to know each other. Someone may avoid a peer because of race, religion, gender, disability, or accent, even though the two could have a strong connection. In families, biased beliefs may create tension when relatives disagree about social groups or identity. In romantic relationships, stereotypes about gender roles can shape expectations and communication.

In group dynamics, prejudice can increase conflict. People may blame out-groups for problems, strengthen their own group identity, or resist cooperation. This can be seen in school settings, sports teams, online communities, and nations. When prejudice is shared by many people, discrimination can become normalized and harder to challenge.

On the other hand, positive relationships can reduce prejudice. Contact between groups can help when it includes equal status, shared goals, cooperation, and support from authority figures. When people work together successfully, stereotypes often weaken because they meet individuals rather than abstract labels.

Reducing prejudice and discrimination

Psychologists have found several ways to reduce prejudice. One important method is the contact hypothesis, which suggests that under the right conditions, contact between groups can improve attitudes. The best conditions include equal status, common goals, cooperation, and institutional support.

Another method is perspective taking, where people try to imagine another person’s experience. This can increase empathy and reduce automatic bias. Education also helps by teaching accurate information about groups and encouraging critical thinking about stereotypes.

However, change is not always quick. Prejudice can be deeply rooted in social norms, media, and long-standing inequality. That is why reducing discrimination often requires both individual change and structural change, such as fair policies, inclusive language, and equal access to opportunities.

For IB Psychology, it is important to remember that reducing prejudice is not only about “being nice.” It involves understanding how group identity, norms, power, and social learning shape behavior. This makes the topic relevant to social responsibility and ethical citizenship 🌍.

Conclusion

Prejudice and discrimination are central ideas in the psychology of human relationships because they shape how people see, treat, and respond to one another. Prejudice is an attitude, discrimination is behavior, and stereotypes are beliefs about groups. Research such as social identity theory shows how group membership can influence bias, while studies of social norms and contact explain why prejudice can grow or decrease.

For students, the key takeaway is that prejudice and discrimination are not isolated problems. They affect friendships, teamwork, institutions, and society as a whole. Understanding them helps psychologists explain conflict, unfairness, and the conditions that support more respectful relationships.

Study Notes

• Stereotype = a belief about a group.
• Prejudice = an attitude or feeling toward a group.
• Discrimination = unfair behavior toward a group.
• Social identity theory explains bias through in-groups and out-groups.
• In-group bias happens when people favor their own group.
• Social categorization helps people simplify the world, but it can lead to bias.
• Group norms can encourage or discourage prejudice.
• Power matters because discrimination often limits real opportunities.
• Experiments can test how group labels affect judgments and behavior.
• Prejudice influences friendships, teamwork, conflict, and social trust.
• The contact hypothesis suggests that positive intergroup contact can reduce prejudice.
• Reducing prejudice often requires both personal awareness and social change.