Difficulty: Intermediate | Prerequisites: Familiarity with social cognition basics (schemas, attribution). Group dynamics material helps but is not essential.
Prejudice is one of the most heavily tested topics in social psychology. This section asks where prejudice comes from (categorisation, attribution errors, social identity), how it perpetuates itself (self-fulfilling prophecies, subtyping), and what can be done about it. It connects backwards to group dynamics and forward to aggression and conflict. You should already understand the fundamental attribution error and have a rough sense of ingroup/outgroup distinctions.
Prejudice is sustained by cognitive shortcuts (categorisation, illusory correlations), attribution biases (the group-serving bias), and self-perpetuating cycles where expectations shape both perception and behaviour. Stereotype threat shows that merely being aware of a negative stereotype can impair performance. Reducing prejudice requires cooperative contact, institutional change, and internal motivation.
Categorisation
The cognitive process of clustering objects or people into groups to simplify the environment. In simple terms, it is the mental shortcut of sorting people into boxes based on visible cues.
Stereotype
A generalised belief about a group of people that assumes a correlation between group membership and certain characteristics. Think of it as the mental picture that pops up when you hear a group label.
Illusory correlation
Perceiving a relationship between two things (e.g. a group and a behaviour) when no such relationship exists, or overestimating its strength. This often happens because distinctive events are more memorable.
Fundamental attribution error
The tendency to attribute others' behaviour to their dispositions rather than to situational factors. In simple terms, assuming someone acted a certain way because of who they are, not because of the circumstances.
Group-serving bias
Explaining away outgroup members' positive behaviours while attributing their negative behaviours to their dispositions, and doing the reverse for one's own group.
Subtyping
Accommodating individuals who deviate from a stereotype by treating them as "exceptions to the rule," thereby preserving the overall stereotype.
Subgrouping
Accommodating individuals who deviate from a stereotype by forming a new, narrower stereotype for that subset. Unlike subtyping, this can gradually reshape the original category.
Stereotype threat
A disruptive concern, when facing a negative stereotype, that one will be evaluated based on that stereotype. In simple terms, the anxiety of worrying you will confirm a negative expectation about your group.
Self-fulfilling prophecy
A belief or expectation that causes a person to act in ways that ultimately confirm the original belief. In the context of prejudice, discriminatory treatment can produce the very behaviours the prejudice predicted.
Ostracism
Acts of excluding or ignoring. Relevant here because social exclusion based on group membership is a key mechanism through which prejudice causes harm.
Breaking the prejudice habit is difficult. Unwanted thoughts and feelings can persist even when a person consciously rejects them, especially for older adults and people under the influence of alcohol.
The good news: prejudicial reactions are not inevitable.
Awareness of the gap between how one should feel and how one does feel can motivate change.
Automatic prejudices subside more reliably when the motivation to avoid prejudice is internal ("I personally believe this is wrong") rather than external ("I don't want to look prejudiced").
We simplify our environment by clustering objects and people into categories. For those categories we often rely on stereotypes, particularly when pressed for time, preoccupied, tired, or emotionally aroused. Ethnicity and sex are especially powerful sorting dimensions.
Categorisation is not the same as prejudice, but it provides the foundation on which prejudice is built.
Distinctiveness and distorted judgement:
Distinctive people and vivid or extreme occurrences capture disproportionate attention and distort our judgements.
When someone in a group is conspicuous, we tend to see that person as causing whatever happens around them.
The extra attention paid to distinctive individuals creates an illusion that they differ from the norm more than they really do.
Illusory correlations:
Our minds use distinctive or vivid cases as shortcuts for judging entire groups.
Distinctive events foster illusory correlations: we perceive a link between a group and a behaviour even when none exists, because both the group and the behaviour were attention-grabbing.
Stereotypes rest on this assumed correlation between group membership and individual characteristics.
When explaining others' actions, we frequently commit the fundamental attribution error: attributing behaviour to inner dispositions while discounting situational forces.
The group-serving bias takes this further:
Outgroup members' positive behaviours are explained away ("she got lucky").
Their negative behaviours are attributed to their dispositions ("that's just how they are").
Meanwhile, the same pattern is reversed for one's own group: positive behaviour is dispositional, negative behaviour is situational.
Prejudice has consequences as well as causes. It creates self-reinforcing cycles.
Self-perpetuating judgements:
Prejudgements guide attention and memory. When a group member behaves as expected, we note it and our belief is confirmed.
When a member behaves inconsistently with our expectation, we explain it away as due to special circumstances.
Subtyping preserves the stereotype by treating deviant individuals as "exceptions to the rule."
Subgrouping creates a new sub-stereotype for the deviant subset, which can gradually reshape the original category over time.
Discrimination as self-fulfilling prophecy:
Discrimination can produce the very behaviours it predicted. Victims may respond in two broad patterns:
Blaming oneself: withdrawal, self-hate, aggression directed inward against one's own group.
Blaming external causes: fighting back, suspiciousness, increased group pride.
Attitudes may coincide with social hierarchies partly because of how discrimination itself shapes its victims' behaviour and outcomes.
Stereotype threat is the disruptive concern, when facing a negative stereotype, that one will be evaluated based on it. Unlike long-term self-fulfilling prophecies that gradually shape self-concept, stereotype threat has immediate effects on performance.
How it undermines performance:
Stress impairs brain activity, particularly in areas needed for complex cognitive tasks.
Self-monitoring (worrying about making mistakes) disrupts focused attention.
Suppressing unwanted thoughts and emotions consumes working-memory resources.
Positive stereotypes can work in the other direction, enhancing performance when people are reminded of a favourable group association.
Do stereotypes bias judgements of individuals?
Yes, but with nuance:
Stereotypes often contain a kernel of truth, in the sense that they reflect group averages, but they overstate differences and obscure individual variation.
People often evaluate individuals more positively than the groups those individuals belong to.
The strength of the stereotype matters: a strong, widely held stereotype biases judgements more.
Stereotypes can operate subtly, colouring how we interpret ambiguous behaviour.
We evaluate people more extremely when their behaviour violates our stereotypes (the contrast effect).
Six strategies drawn from the research:
Seek to create cooperative, equal-status relationships (the contact hypothesis works best under these conditions).
Mandate nondiscrimination through institutional policy.
Remove institutional supports for prejudice.
Spread the norm that inclusiveness and diversity are valued.
Personalise outgroup members: make efforts to see individuals rather than a homogenous mass.
Use awareness of one's own automatic prejudices as motivation to change; internal motivation is more effective than external pressure.
"Categorisation is prejudice." Categorisation is a normal cognitive process. It provides a foundation for prejudice but is not prejudice itself.
"Stereotype threat only affects minority groups." Any group can experience stereotype threat when a relevant negative stereotype is salient. Men can experience it in domains stereotyped as female, for example.
"Subtyping weakens stereotypes." The opposite. Subtyping preserves the overall stereotype by carving out exceptions. Subgrouping, by contrast, can gradually change the broader category.
"If a stereotype contains some truth, it is not harmful." Even accurate group-level averages distort judgements of individuals and fuel self-fulfilling prophecies.
Be able to distinguish categorisation from prejudice and explain why categorisation is a necessary but not sufficient condition.
Know the difference between subtyping and subgrouping and which one preserves vs. changes stereotypes.
Expect a question on stereotype threat: how it works mechanistically (stress, self-monitoring, working-memory drain) and how it differs from a self-fulfilling prophecy in timescale.
The group-serving bias is a common short-answer target. Be ready to explain it with examples for both ingroup and outgroup.
Know the six strategies for reducing prejudice and be able to explain why internal motivation matters more than external pressure.
True or false: Categorisation and prejudice are the same thing. (False. Categorisation provides a foundation for prejudice but is not prejudice itself.)
Fill in the blank: Treating individuals who deviate from a stereotype as "exceptions to the rule" is called ________. (Subtyping.)
True or false: Stereotype threat affects only long-term self-concept. (False. Its effects are immediate.)
Fill in the blank: The ________ bias involves explaining away outgroup members' positive behaviours while attributing their negative behaviours to dispositions. (Group-serving.)
True or false: External motivation to avoid prejudice is more effective than internal motivation. (False. Internal motivation is more effective.)
Q: Explain how illusory correlations contribute to stereotyping. Use the concept of distinctiveness in your answer.
A: Distinctive people and events capture more attention than ordinary ones. When a member of a minority group (distinctive by rarity) performs an unusual behaviour (distinctive by nature), both elements are memorable. The pairing is encoded more strongly than base rates would predict, creating a perceived correlation between the group and the behaviour that does not reflect reality.
Q: A company hires a woman as head of engineering. Her male colleagues privately note she is "not like other women." Which concept does this illustrate, and does it weaken the stereotype?
A: This illustrates subtyping. By treating her as an exception to the rule, her colleagues preserve the overall stereotype about women and engineering. The stereotype remains intact because it is not forced to accommodate her success.
Q: Describe two mechanisms by which stereotype threat impairs cognitive performance.
A: First, the stress produced by stereotype threat impairs brain activity, reducing the neural resources available for complex tasks. Second, self-monitoring (constantly checking whether one is making mistakes) diverts focused attention away from the task itself, consuming working-memory capacity that would otherwise be used for problem-solving.
Q: Why is internal motivation to avoid prejudice more effective than external motivation?
A: External motivation (wanting to appear unprejudiced to others) only suppresses prejudice when social scrutiny is present. Internal motivation (a personal conviction that prejudice is wrong) creates a stable discrepancy between how one feels and how one believes one should feel, which motivates genuine change that persists even without an audience. Research shows that automatic prejudices subside more reliably when motivation is internally driven.
Prejudice builds directly on group dynamics: ingroup bias, group polarisation, and groupthink all amplify prejudiced attitudes. It also connects forward to aggression (prejudice can fuel hostile behaviour toward outgroups) and to the conflict and peacemaking unit, where intergroup contact and superordinate goals are presented as remedies for the same biases discussed here.
Prejudice, stereotyping, discrimination, categorisation, social categorisation, illusory correlation, distinctiveness, group-serving bias, fundamental attribution error, subtyping, subgrouping, stereotype threat, self-fulfilling prophecy, ostracism, contact hypothesis, equal-status contact, internal motivation, automatic prejudice, implicit bias, outgroup homogeneity, ingroup favouritism, confirmation bias in prejudice