Inside This Unit: The Full Breakdown
Social Psychology studies how the presence and expectations of others shape thought and behavior — attribution, attitudes, conformity, obedience, group processes, prejudice, and helping. Personality examines the enduring patterns that make individuals distinctive, across the psychodynamic, humanistic, trait, and social-cognitive approaches.
Why it matters
Classic social-psychology experiments (Asch, Milgram, Zimbardo, Festinger) are exam favorites and powerful EBQ evidence, and the person-versus-situation debate is a recurring argumentation prompt.
Key concepts
- Attribution theory explains behavior by disposition (internal) or situation (external); the fundamental attribution error overweights disposition for others’ behavior.
- Attitudes and actions influence each other — cognitive dissonance and foot-in-the-door show behavior changing attitudes, not just the reverse.
- Social influence ranges from conformity (Asch) to obedience (Milgram) to group effects (groupthink, group polarization, social facilitation, social loafing, deindividuation).
- Prejudice, aggression, and attraction have cognitive, emotional, and situational roots; the mere-exposure effect and proximity foster liking.
- Personality theories differ in their engine: psychodynamic (unconscious conflict), humanistic (growth and self-actualization), trait (the Big Five), and social-cognitive (reciprocal determinism).
- Trait theory and the Big Five (OCEAN) provide the most empirically supported, measurable description of personality.
Attribution, Attitudes, and Social Influence
Attribution theory holds that we explain behavior by attributing it to a person’s disposition or to the situation. The fundamental attribution error is our tendency to overestimate disposition and underestimate situation when judging OTHERS (the actor–observer difference and self-serving bias shape how we explain our own behavior). Attitudes and behavior are bidirectional: cognitive dissonance theory (Festinger) says that acting against our attitudes creates discomfort we relieve by changing the attitude, and persuasion techniques like foot-in-the-door leverage this. Conformity is adjusting behavior to a group: Asch’s line studies showed people conform to an obviously wrong majority, driven by normative (to be liked) and informational (to be right) social influence. Milgram’s obedience studies revealed that ordinary people will deliver apparent shocks under authority, highlighting the power of the situation.
Group Behavior, Prejudice, and Helping
Being in a group changes behavior. Social facilitation improves performance on easy/well-learned tasks when others are present, while social loafing reduces individual effort in groups. Deindividuation (loss of self-awareness in a group) can unleash impulsive behavior. Group decision-making shows groupthink (suppressing dissent for harmony) and group polarization (discussion intensifies the group’s initial leaning). Prejudice combines a cognitive component (stereotypes), an emotional component (prejudice), and a behavioral component (discrimination), fed by ingroup bias, scapegoating, and the just-world phenomenon. Aggression has biological, psychological, and social roots, and the bystander effect (with diffusion of responsibility) explains why help is less likely as the number of onlookers grows. Attraction is shaped by proximity, the mere-exposure effect, physical attractiveness, and similarity.
Theories of Personality
The psychodynamic approach (Freud and neo-Freudians) locates personality in unconscious conflict among the id, ego, and superego, managed by defense mechanisms — influential historically but criticized as hard to test. The humanistic approach (Maslow, Rogers) emphasizes free will, the drive toward self-actualization, and the role of unconditional positive regard in healthy self-concept. The trait approach describes personality with stable dimensions; the Big Five (OCEAN: openness, conscientiousness, extraversion, agreeableness, neuroticism) is the most research-supported and is measured with objective inventories. The social-cognitive approach (Bandura) stresses reciprocal determinism — the continuous interplay of person, behavior, and environment — and concepts like self-efficacy and locus of control. Evaluating a theory’s testability and evidence is a frequent exam task.
AP exam tip
When a scenario describes someone judging another person, check for the fundamental attribution error (blaming character, ignoring situation). For obedience/conformity prompts, tie the behavior to the SITUATION (authority, group pressure), not the person’s traits — that situational explanation is exactly what Milgram and Asch demonstrated and what graders look for.
Connections to other units
- Unit 2 (Cognition): Stereotypes are schemas, and attribution errors are cognitive biases.
- Unit 3 (Development and Learning): Observational learning and reinforcement shape attitudes, aggression, and personality.
- Unit 5 (Mental and Physical Health): Personality and social factors contribute to vulnerability, coping, and the biopsychosocial model of disorders.
