Master attribution, conformity, obedience, persuasion, the Big Five, Maslow, Bandura, emotion theories, and every social and personality concept on the exam.
Unit 4 is the largest unit on the exam, covering roughly 22–26% of the AP Psychology test. It has three main sections: social psychology, personality, and motivation and emotion.
Social psychology covers attribution theory (fundamental attribution error, self-serving bias), attitudes and behavior change (cognitive dissonance, central vs. peripheral persuasion, foot-in-the-door and door-in-the-face compliance), and the powerful situational forces that shape behavior — conformity (Asch), obedience (Milgram), social facilitation, social loafing, bystander effect, groupthink, and group polarization.
Personality examines four major frameworks: Freud's psychodynamic theory (id, ego, superego, defense mechanisms), Maslow and Rogers's humanistic theory (self-actualization, unconditional positive regard), trait theory (Big Five / OCEAN), and Bandura's social-cognitive theory (reciprocal determinism, self-efficacy).
Motivation and emotion covers drive-reduction theory, the Yerkes-Dodson law, Maslow's hierarchy, intrinsic vs. extrinsic motivation, and the three major emotion theories: James-Lange, Cannon-Bard, and Schachter-Singer's two-factor theory.
Key terms preview
A taste of what you’ll find in The Essentials and Flashcards.
Fundamental attribution error
Overestimating personality and underestimating the situation when explaining other people's behavior.
Cognitive dissonance
The discomfort of holding conflicting beliefs — typically resolved by changing one to match the other.
Milgram obedience study
Most participants delivered what they believed were dangerous shocks when ordered by an authority.
Big Idea 1. We explain behavior with attributions — and we get them wrong
Attribution theory describes how we decide whether someone's behavior reflects who they are (dispositional) or the situation. The fundamental attribution error shows we systematically overestimate personality for others, while the self-serving bias shows we take credit for successes but blame situations for failures.
Big Idea 2. Attitudes shape behavior, and behavior shapes attitudes
We expect attitudes to drive behavior, but the reverse is also true. Cognitive dissonance shows that when our actions conflict with our beliefs, we often change the belief to match. Persuasion can use logic (central route) or surface cues (peripheral route) to shift attitudes.
Big Idea 3. Social situations shape behavior more than we expect
Conformity (Asch), obedience (Milgram), the bystander effect, social loafing, and groupthink all show that ordinary people behave very differently depending on the situation. Situational forces are often more powerful than personality.
Big Idea 4. Personality theories take very different angles
Psychodynamic theory: unconscious conflict. Humanistic theory: free will and self-actualization. Trait theory: stable Big Five dimensions. Social-cognitive theory: person-environment interaction. Each captures real aspects of personality.
Big Idea 5. Motivation has biological and psychological roots
Drive-reduction explains biological needs; Maslow's hierarchy adds psychological needs; the Yerkes-Dodson law links arousal to performance; and the intrinsic/extrinsic distinction shows that internal motivation often outlasts external rewards.
Big Idea 6. Emotion involves body, brain, and interpretation
James-Lange, Cannon-Bard, and Schachter-Singer's two-factor theory each describe a different relationship between physiology and feeling. Universal emotions (Ekman) and the facial-feedback effect highlight the biological side of emotional experience.