Prejudice and Discrimination

students, imagine walking into a new school and noticing that some students are instantly welcomed while others are ignored because of the way they look, speak, or dress. That quick judgment can affect friendships, group work, job opportunities, and even how people feel about themselves. In psychology, these judgments and actions are studied as part of prejudice and discrimination. 🌍

In this lesson, you will learn to:

• explain the main ideas and key terms behind prejudice and discrimination,
• apply IB Psychology HL reasoning to real situations,
• connect these ideas to the broader study of human relationships,
• and use psychological evidence to support your understanding.

By the end, students, you should be able to describe how prejudice begins, how it turns into discrimination, and why these processes matter in families, schools, workplaces, and societies.

Understanding the key terms

In psychology, prejudice is an unjustified attitude toward a person or group based on their membership in a social category. It usually involves three parts: feelings, beliefs, and behavior tendencies. A person may feel uncomfortable around a group, believe negative stereotypes about that group, and act in ways that avoid or exclude its members.

Discrimination is the behavior that results from prejudice. It is the unfair treatment of individuals because they belong to a particular group. A student being left out of a club because of ethnicity, or a worker being paid less because of gender, are examples of discrimination.

A related term is stereotype. A stereotype is a general belief about the characteristics of a group. Stereotypes can be positive or negative, but they are often oversimplified and inaccurate. For example, believing that all teenagers are lazy is a stereotype. When a stereotype is accepted without question, it can lead to prejudice.

Another useful term is in-group and out-group. The in-group is the group a person belongs to, while the out-group is a group they do not belong to. People often show more trust and favor toward the in-group, which can create bias. 🤝

A final key term is social identity. This is the part of a person’s self-concept that comes from group membership, such as nationality, religion, school team, or ethnicity. If a group becomes important to someone’s identity, they may defend it strongly and view other groups more negatively.

Why prejudice develops

Psychologists explain prejudice using several approaches. One major explanation is social identity theory, developed by Henri Tajfel and John Turner. This theory says people want a positive social identity, so they compare their in-group with other groups. If their in-group seems better, their self-esteem may improve. This can lead to in-group favoritism and unfair judgments about out-groups.

A famous demonstration of this idea is Tajfel’s minimal group studies. Participants were randomly assigned to groups based on trivial factors, such as estimating dots on a screen. Even though the groups were meaningless, participants still favored their own group when giving rewards. This shows that group membership alone can be enough to create bias.

Another explanation is realistic conflict theory, associated with Muzafer Sherif. This theory states that prejudice grows when groups compete for limited resources such as money, status, jobs, or land. When people believe another group threatens what they value, hostility can increase. Sherif’s summer camp research, often called the Robbers Cave study, found that boys in competing groups developed conflict, insults, and aggression. When they had to work together on shared goals, tension decreased.

Psychologists also study the role of learning. Children can learn prejudiced attitudes from parents, friends, media, and culture. If a person hears repeated negative messages about a group, those ideas can become normal to them. This means prejudice is not only personal; it is also social and cultural.

From attitudes to actions: discrimination in real life

Prejudice does not always lead to direct discrimination, but it often increases the chance of unfair behavior. A person may have a hidden bias yet not act on it openly because of laws, social pressure, or personal values. Still, discrimination can appear in subtle ways.

For example, in a school, a teacher may call on boys more often than girls in science class without realizing it. In hiring, a manager may assume a candidate with an unfamiliar name is less qualified. In social settings, people may avoid sitting next to someone wearing religious clothing. These actions may seem small individually, but they can limit opportunities and create repeated harm.

Psychology distinguishes between direct discrimination and indirect discrimination. Direct discrimination is obvious unfair treatment, such as refusing service to someone because of race. Indirect discrimination happens when a rule or practice seems neutral but disadvantages a group. For instance, a school event held only at a time that makes it difficult for some religious students to attend may unintentionally exclude them.

Discrimination can also become institutional when unfair treatment is built into systems and organizations. This is important in IB Psychology HL because it shows that prejudice is not just about individual attitudes; it can also be shaped by social structures.

Psychological research and evidence

One important area of research is how people make judgments about others. Research on implicit bias suggests that people may hold automatic associations outside conscious awareness. These associations can affect decisions quickly, especially when people are under time pressure. This helps explain why prejudice can appear even in individuals who sincerely believe in equality.

A widely discussed example is the study of stereotype threat by Claude Steele and colleagues. Stereotype threat occurs when people fear confirming a negative stereotype about their group, and that fear can hurt performance. For example, if students are reminded of a stereotype that says their group performs poorly in math, they may become anxious and score lower. The important point is that prejudice does not only harm relationships; it can also affect achievement and confidence.

Research also shows that contact between groups can reduce prejudice under certain conditions. The contact hypothesis, associated with Gordon Allport, states that prejudice is reduced when groups interact under equal status, cooperative conditions, shared goals, and support from authority figures. This idea links directly to human relationships because many friendships, classrooms, and workplaces improve when people work together toward common goals.

However, contact does not always work automatically. If groups compete, or if one group has more power, contact may increase tension instead of reducing it. That is why psychologists emphasize the conditions of contact rather than contact alone.

Applying IB Psychology HL reasoning

students, in IB Psychology HL, you should not just define prejudice and discrimination; you should explain them using psychological theory and evidence. A strong answer might compare social identity theory and realistic conflict theory.

For example, if asked why prejudice exists in sports teams, you could say that social identity theory explains loyalty to one’s own team and negative views of rival teams, while realistic conflict theory explains how competition for trophies, status, or resources can strengthen hostility. This kind of comparison shows deeper understanding.

You can also apply research methods. A psychologist studying prejudice might use a lab experiment to test how group labels affect behavior. For example, participants could be randomly assigned to read a job application with either a familiar or unfamiliar name, and the researcher could measure how qualified the applicant is judged to be. Because the only planned change is the name, the experiment can help show whether bias influences decision-making.

When evaluating research, IB expects you to consider strengths and limitations. A strength of experiments is control over variables, which helps identify cause and effect. A limitation is that real-life prejudice is more complex than a lab task, so results may not fully reflect everyday behavior. Another issue is ethics: researchers must avoid causing lasting harm, distress, or humiliation to participants.

Prejudice and discrimination in the broader topic of human relationships

This topic belongs to Psychology of Human Relationships because relationships are shaped by how people perceive, communicate with, and treat one another. Prejudice can weaken relationships by creating suspicion, distance, and unfair expectations. Discrimination can damage trust and belonging, which are essential for healthy relationships.

It also connects to communication and relationship change. Negative labels can change the way people speak to each other, often leading to less respect and more conflict. In groups, prejudice can make collaboration harder because people may not listen to members of an out-group.

Prejudice is also linked to group dynamics and conflict. Groups often develop strong identities, and these identities can create loyalty as well as rivalry. When a group sees another group as a threat, conflict may grow. Understanding these processes helps explain bullying, racism, sexism, xenophobia, and other forms of exclusion.

Finally, prejudice relates to prosocial behaviour and social responsibility. Reducing discrimination often requires people to act responsibly, challenge unfair comments, support targeted individuals, and create inclusive spaces. In this way, psychological knowledge can help improve relationships and communities. 🌱

Conclusion

Prejudice is an attitude based on group membership, while discrimination is the behavior that comes from that attitude. students, the key psychological message is that these are not random personal flaws alone; they are influenced by identity, competition, learned beliefs, and social systems. Social identity theory, realistic conflict theory, stereotype threat, and the contact hypothesis all help explain different parts of the picture.

Within Psychology of Human Relationships, this topic matters because it shows how group membership can shape trust, communication, conflict, and cooperation. Understanding prejudice and discrimination helps us explain why relationships sometimes break down and how they can be improved through fairness, cooperation, and respectful contact.

Study Notes

• Prejudice = an unjustified attitude toward a group.
• Discrimination = unfair behavior toward a person because of group membership.
• Stereotypes are simplified beliefs about groups and can feed prejudice.
• In-group members are “us”; out-group members are “them.”
• Social identity theory explains prejudice through in-group favoritism and the need for positive self-esteem.
• Realistic conflict theory explains prejudice through competition for limited resources.
• Sherif’s Robbers Cave study showed how competition increases conflict and shared goals reduce it.
• Tajfel’s minimal group studies showed that even random group labels can create bias.
• Stereotype threat happens when fear of confirming a stereotype harms performance.
• Contact hypothesis says prejudice can decrease when groups interact with equal status, cooperation, shared goals, and support.
• Prejudice affects relationships by reducing trust, empathy, and cooperation.
• Discrimination can be direct, indirect, or institutional.
• In IB Psychology HL, always connect definitions to theory, research evidence, and real-world application.