Difficulty: Intermediate | Prerequisites: Social Identity Theory, cognitive schemas (System 1/System 2), Week 9 (Emotions).
This topic examines how humans form groups around shared goals (coalitions), how categorical thinking leads to stereotypes, and how stereotypes produce prejudice, stigma, and discrimination. It covers Tajfel's Social Identity Theory, Sherif's Realistic Conflict Theory, how stereotypes function as cognitive schemas, when they are most and least accurate, self-fulfilling prophecies, stereotype threat, and strategies for reducing prejudice. This is one of the most content-heavy weeks in the course.
Humans uniquely form coalitions (groups organised by shared goals/beliefs, not just kinship). Categorical thinking and group signals help us manage these structures but also produce stereotypes, which function as social schemas that speed up processing at the cost of accuracy for individuals. Prejudice is a negative attitude attributed to someone based on perceived group membership, driven fundamentally by competition over limited resources (Realistic Conflict Theory). Stereotypes are usually probabilistically accurate at the group level but become harmful when individuals are reduced to group features. Stereotype threat, self-fulfilling prophecies, and subtle discrimination (benevolent discrimination, tokenism) compound the problem. Reducing prejudice requires bias awareness, counter-stereotyping, perspective-taking, and reconfiguring coalition boundaries.
Stereotypes
Beliefs or expectations about the attributes thought to be characteristic of members of a group. Cognitively, they function as social schemas. In simple terms, these are the mental shortcuts you use to make quick judgements about someone based on which group they appear to belong to.
Stigma
The experience of being socially rejected or reduced in the eyes of others, often due to negative stereotyping.
Prejudice
Negative attitudes directed presumptively toward members of a group, usually due to negative stereotyping. A categorical inference attributed to someone because of their perceived group membership, not an evaluation of their individual character.
Discrimination
Unfair or unjust treatment motivated by prejudice.
Coalition
A social group constructed around shared goals or ideas (as opposed to kinship). A rare phenomenon in the animal kingdom, undertaken only by socially and cognitively sophisticated birds and mammals.
Tajfel's Social Identity Theory
A theory describing how group identity forms through three processes: Social Categorisation ("what groups exist?"), Social Identification ("which groups are mine?"), and Social Comparison ("are my groups better than others?").
Realistic Conflict Theory (Muzafer Sherif)
The theory that intergroup prejudice is fundamentally driven by competition over limited resources, explaining the material and evolutionary rationale for ingroup-outgroup double standards.
Pygmalion Effect
The simplest form of self-fulfilling prophecy: if someone expects you to have a certain characteristic and interacts with you accordingly (with Confirmation Bias), you are likely to unintentionally exhibit that trait.
Stereotype Threat
Performance-impairing anxiety that arises when one fears confirming a negative stereotype about a group one belongs to.
Attributional Ambiguity
The uncertainty stereotyped individuals face in interpreting whether others' behaviour toward them is based on their individual character or their group membership.
Benevolent Discrimination
Enacting discriminatory behaviours while rationalising that they are designed to benefit the victims.
Tokenism
Perfunctory gestures of inclusion intended only to deflect criticism.
Double Consciousness
The need to see yourself through the eyes of the mainstream, experienced by members of stigmatised groups.
Outgroup Homogeneity
The tendency to see outsiders as interchangeable, low-value, and less human, while seeing ingroup members as noble, individual, and self-determined.
In non-human animals, most social groups are organised by family/genetic relatedness. Humans are unique in forming coalitions: groups constructed around shared goals or ideas.
Coalition formation is a cognitive superpower, but it requires categorical thinking sensitive to both intentional and accidental cultural cues.
Group signals help identify membership:
Costly signals (hard to fake): permanent tattoos, scarring, piercings
Involuntary signals (hard to fake): food aversions and spoken accents (both difficult to mask after childhood)
The categorical groups that primarily define our social worlds are organised by goals and beliefs (ideology): national, religious, gender, political.
Self-categorisation is closely tied to personal values, calibrating social expectations and shaping self-esteem.
Best understood through Tajfel's Social Identity Theory and its three central processes:
Social Categorisation: "What groups exist?"
Social Identification: "Which groups are mine?"
Social Comparison: "Are my groups better than the others?"
The nature of these processes assumes intergroup conflict is likely.
The most fundamental driving force for intergroup prejudice is competition over limited resources.
Realistic Conflict Theory (Muzafer Sherif) explains the material and evolutionary rationale for ingroup-outgroup double standards:
Ingroup favouritism: seeing members as noble, individual, nuanced, and self-determined
Outgroup homogeneity: seeing outsiders as interchangeable, low-value, less human
Cognitively, stereotypes exist as social schemas (internal memory models structuring thought). This means:
We process information more quickly when consistent with our stereotypes
We focus attention more easily on stereotype-consistent information
We use tacit inferences to make inconsistent details fit together
Stereotypes are not inherently negative. They are a type of cognitive organisational structure that allows System 1 assessments. We use them in negative contexts, but the mechanism is neutral.
Stereotypes are exquisitely tuned learning engines that are very good at picking up real trends. They are usually probabilistically accurate at the group level.
The main problem: these processes are designed to make us effective under typical ancestral conditions, not 100% correct.
Stereotypes are most inaccurate about:
Winners of competitions between groups (our side always wins)
The threat/danger posed by outgroups (over-estimated)
How "natural" or "universal" ingroup norms are (over-estimated)
The degree of consensus within an outgroup (over-estimated)
The degree of variation within an outgroup (under-estimated)
Stereotypes are harmful not primarily when they are false, but when the individual is reduced to group features.
Self-fulfilling prophecy: when expectations shape behaviour to bring about the expected outcome.
The simplest form is the Pygmalion Effect: if someone expects you to have a trait and interacts with you through Confirmation Bias, you are likely to exhibit that trait.
Stereotype threat: performance-impairing anxiety from fear of confirming a negative stereotype about one's group. Affects academic performance, test scores, and professional settings.
Effects of stereotypes on stereotyped individuals:
Attributional ambiguity (uncertain whether others' behaviour is about you or your group)
Self-stereotyping (stereotypes affect one's own self-evaluations)
Self-fulfilling prophecy
Stereotype threat
Benevolent discrimination: enacting discriminatory behaviours while rationalising them as beneficial to the victims
Tokenism: perfunctory gestures of inclusion to deflect criticism
Double consciousness: the need to see yourself through the eyes of the mainstream
Modern racism: indirect/covert racism maintained despite rejection of overt racism
Awareness of own biases
Valuing diversity/difference
Counter-stereotyping
Perspective-taking
Diversifying media exposure
Individuation (treating people as individuals rather than group members)
Increased opportunities for contact and interaction
Inducing people to temporarily entertain alternative coalitions that transcend existing group lines reduces bias immediately.
Students often assume stereotypes are always inaccurate. They are usually probabilistically accurate at the group level. The harm comes from reducing individuals to group features.
Prejudice is not the same as discrimination. Prejudice is an attitude; discrimination is behaviour.
Students sometimes think the Pygmalion Effect is about self-belief. It is about other people's expectations shaping your behaviour through their interaction patterns.
"Privately held prejudices are harmless" is a common lay belief the course explicitly challenges. Because most judgement is System 1 (automatic), private prejudices leak into behaviour.
⚠️ Know the distinction between stereotypes, stigma, prejudice, and discrimination. Each is a separate concept.
⚠️ Tajfel's three processes (Social Categorisation, Social Identification, Social Comparison) are frequently tested.
⚠️ Realistic Conflict Theory and its connection to resource competition is a core exam concept.
⚠️ The five areas where stereotypes are most inaccurate are a common exam list.
⚠️ Know the difference between stereotype threat and self-fulfilling prophecy.
⚠️ Be able to list at least four tactics for reducing prejudice.
⚠️ Costly signals vs. involuntary signals as indicators of group membership.
Fill in the blank: In non-human animals, most social groups are organised by ______. (Family/genetic relatedness.)
True or False: Stereotypes are usually inaccurate at the group level. (False. They are usually probabilistically accurate.)
Fill in the blank: The three processes in Tajfel's Social Identity Theory are Social Categorisation, Social Identification, and ______. (Social Comparison.)
True or False: Stereotype threat improves performance by increasing motivation. (False. It impairs performance through anxiety.)
True or False: Privately held prejudices cannot affect behaviour because they are not expressed openly. (False. System 1 judgement means private prejudice leaks into behaviour automatically.)
Q: What is prejudice?
A: Unfair pre-judgement of an individual based on the generalised characteristics of a group they are perceived to belong to.
Q: What type of social groups are humans uniquely good at forming?
A: Coalitions, social groups organised by shared goals and/or beliefs.
Q: According to Realistic Conflict Theory, what elicits group conflict?
A: Perceived competition over resources or status, along group lines.
Q: Are stereotypes more likely to be wrong than right at the group level?
A: No. Stereotypes and schemata are usually probabilistically accurate.
Q: Are stereotypes only harmful when they are generally false?
A: No. The main issue is the reduction of the individual to group features.
Q: What is Stereotype Threat?
A: Performance-impairing anxiety from fear of confirming a negative stereotype.
Q: What is a Self-Fulfilling Prophecy in social psychology?
A: When one's expectations shift behaviour to bring about that expected outcome.
Q: What are the four main tactics best suited to reducing prejudice?
A: Bias control, pro-diversity attitudes, counter-stereotypes, and perspective-taking.
Q: How can coalition-based social cognition be manipulated to reduce prejudice?
A: Inducing participants to temporarily entertain alternative coalitions that transcend existing group lines reduces bias immediately.
This connects to Emotions (Week 9) because emotional reactions (fear, disgust) toward outgroups drive prejudiced attitudes. It connects to Persuasion (Week 10) because prejudice reduction strategies often work by triggering cognitive dissonance. It connects to Group Dynamics (Week 15) because groupthink and group polarisation amplify prejudiced attitudes when groups are homogeneous.
Stereotypes, stigma, prejudice, discrimination, coalition, categorical thinking, group signals, costly signals, involuntary signals, Social Identity Theory, Tajfel, social categorisation, social identification, social comparison, Realistic Conflict Theory, Muzafer Sherif, ingroup favouritism, outgroup homogeneity, schema, stereotype accuracy, self-fulfilling prophecy, Pygmalion Effect, stereotype threat, attributional ambiguity, self-stereotyping, benevolent discrimination, tokenism, double consciousness, modern racism, reducing prejudice, counter-stereotyping, perspective-taking, individuation, PSY 301, social psychology, NYU