Prejudice, Discrimination, Prosocial Behavior, and Relationships

1. Stereotypes, Prejudice, Discrimination, and In-Group Bias

A stereotype is a generalized belief about a group (the cognitive component). Prejudice is a negative attitude — an unjustified or unsupported negative feeling — toward a group (the affective component). Discrimination is unfair behavior directed at people because of their group membership (the behavioral component). The three are distinct and don't always co-occur.

People divide the social world into in-groups ("us") and out-groups ("them"), and in-group bias — favoring one's own group — emerges even in the minimal group paradigm, where membership is arbitrary and meaningless (Tajfel and colleagues). Social identity theory (Tajfel & Turner) explains this: part of our self-esteem comes from group membership, so we boost our in-group to feel better about ourselves. Implicit bias refers to automatic, often unconscious associations and attitudes (measured with tools like the Implicit Association Test) that can influence behavior without deliberate intent — distinct from explicitly endorsed prejudice.

2. Reducing Prejudice: The Contact Hypothesis

The contact hypothesis (Gordon Allport, 1954) proposes that intergroup contact can reduce prejudice — but only under specific conditions: equal status between groups, common goals, intergroup cooperation, and institutional support. When contact is casual, unequal, or competitive, it can backfire. Supportive evidence includes cooperative-learning classrooms (the "jigsaw classroom") and Sherif's Robbers Cave experiment, in which rival summer-camp groups reduced hostility only after working together on shared, superordinate goals. This is a hopeful but conditional finding — contact helps under the right conditions and is not a cure-all.

3. Prosocial Behavior and Attraction

Prosocial behavior is any voluntary action intended to benefit others; altruism is helping motivated purely by concern for another's welfare, with no expectation of personal benefit — and whether truly selfless helping exists is debated (Batson's empathy-altruism hypothesis argues that empathy motivates genuinely altruistic helping). Empathy — understanding and sharing another's feelings — is a key motivator of helping. The bystander effect (Latané & Darley, 1968) is the finding that the more people present at an emergency, the less likely any single person is to help. It arises largely from diffusion of responsibility — each bystander assumes someone else will act — plus pluralistic ignorance (assuming others' inaction means no real emergency) and evaluation apprehension. Latané and Darley developed this work after the 1964 Kitty Genovese case, whose original press reports of "38 unresponsive witnesses" were later shown to be inaccurate.

Turning to relationships: attraction is reliably predicted by proximity (we like those we see often — the mere exposure effect), similarity (shared attitudes and values), and reciprocity (we like people who like us); physical attractiveness also influences initial attraction. Sternberg's triangular theory of love holds that love has three components — intimacy (closeness and emotional connection), passion (physical and romantic arousal), and commitment (the decision to maintain the relationship) — whose combinations form types such as romantic love (intimacy + passion), companionate love (intimacy + commitment), and consummate love (all three).

How it works

1. We categorize people into in-groups and out-groups, then favor our in-group (in-group bias).
2. Stereotypes (beliefs), prejudice (feelings), and discrimination (actions) can follow, sometimes implicitly.
3. Prejudice can be reduced when groups meet under equal status, shared goals, cooperation, and institutional support.
4. In an emergency, each extra bystander diffuses responsibility, so help becomes less likely.
5. Help becomes more likely when the situation is clear, the helper feels capable, someone takes the lead, and empathy is engaged.
6. Attraction grows from proximity, similarity, and reciprocity, and relationships are described by combinations of intimacy, passion, and commitment.

Common confusions

Memory aids

For the three layers of intergroup bias, use "ABC: Belief, Attitude, Conduct" — Belief = stereotype (what we think), Attitude = prejudice (what we feel), Conduct = discrimination (what we do). For love, remember "IPC: Intimacy, Passion, Commitment" — consummate love needs all three.

Quick review

Topic Recap

Intergroup bias has three layers — stereotypes (beliefs), prejudice (feelings), and discrimination (actions) — rooted in in-group favoritism explained by social identity theory. Implicit bias operates below awareness, and the contact hypothesis shows that prejudice can be reduced under equal-status, cooperative, institutionally supported contact. Helping is undermined by the bystander effect and diffusion of responsibility (Latané & Darley), while empathy, proximity, similarity, and reciprocity promote connection. Sternberg's triangular theory organizes love into intimacy, passion, and commitment.

Knowledge Check

1. A hiring manager believes "older workers are slow with technology" and does not interview an older applicant. The belief is a ____, and the refusal to interview is ____.
2. In the minimal group paradigm, people favor their own group even when groups are ______.
3. According to the contact hypothesis, contact reduces prejudice only when groups have equal status, common goals, cooperation, and ______.
4. In Latané and Darley's research, a person is most likely to help when they are ______.
5. Which combination of Sternberg's components defines companionate love?

Answers and Rationales

1. Stereotype; discrimination. The belief is a generalized cognitive claim (stereotype); the refusal to interview is behavior based on group membership (discrimination).
2. Arbitrary or meaningless. In-group bias appears even with trivial criteria such as a coin flip, supporting social identity theory.
3. Institutional support. Allport's four conditions are equal status, common goals, cooperation, and institutional support; missing any one can undermine the effect.
4. Alone (the only bystander). With no one else to share responsibility, helping is faster and more likely.
5. Intimacy + commitment. Companionate love combines closeness and a decision to stay, without the intense passion of romantic love.