AP Psychology Unit 4 Practice Test: Social Psychology and Personality MCQs (Free PDF)

Here's a free AP Psychology Unit 4 practice test: 20 AP-style MCQs on social psychology and personality, seven scenario and data stimuli, and a full rationale for every answer, all aligned to the 2024-25 CED.

Below, three mistakes I see students make on Unit 4 and how to avoid them, plus one worked example so you can see the reasoning.

Unit 4 is 15-25% of the exam (every unit is weighted equally under the redesigned CED, so no single unit is "the biggest"). Unit 4 covers social influence, attribution, personality theories, motivation, and emotion. It's the unit where the same scenario can be about attribution, conformity, or attitude change depending on one line in the stem, so precise vocabulary matters more than in most units. For the full 5-unit map, see our AP Psychology units guide.

AP Psych MCQs mostly don't ask you to recall a definition in isolation. The 75-question multiple-choice section leans stimulus-heavy: many items sit on a scenario, a data table, a research vignette or a graph, and you're expected to apply the concept, not just name it.

One framing point matters more than any other for Unit 4: the CED downplays eponymous labels and emphasizes the underlying concept. Named emotion theories (James-Lange, Cannon-Bard, Schachter-Singer) are not testable by label, though the underlying ideas about arousal, cognition, and appraisal absolutely are. Personality stage theories and Freud's psychosexual stages are excluded outright. So a Unit 4 stem is almost always about the mechanism (what caused this behavior?) rather than "who proposed which model?". For the wider research-skill lens, our AP Psychology research methods guide covers the study designs Unit 4 loves to test.

Common stimulus formats on Unit 4 items include:

• Attribution vignettes that flip between explaining one's own behavior and someone else's
• Persuasion setups where the central vs peripheral route depends on the audience's attention
• Group-behavior scenarios (bystander diffusion, social loafing, conformity, deindividuation, groupthink)
• Audience-effect data tables on practiced vs novel tasks (social facilitation)
• Big Five correlation tables predicting a specific behavior
• Humanistic and psychodynamic therapy exchanges you have to label by perspective
• Motivation scenarios where an outside reward disrupts an already-enjoyed behavior

The practice test in the PDF mirrors that mix. Each item is tagged to a Unit 4 topic (4.1 through 4.7) and to a named AP Psych Science Practice.

Every year I see students walk into Unit 4 MCQs making the same three moves. Catching yourself doing any of them buys you marks with no extra content revision.

Social facilitation was the Unit 4 topic tested on the 2025 EBQ (Evidence-Based Question) (see the 2025 AP Psychology Chief Reader Report for the item). In practice, I see students give a blanket "an audience helps everyone perform better" and skip the practiced-vs-novel qualifier. That's the trap. Social facilitation says an audience raises arousal, which improves performance on well-practiced or simple tasks but worsens performance on new or complex ones.

The right framing on any Unit 4.3 audience-effect item: check the stem for how familiar the task is before you pick a direction. Familiar route, practiced skill, or dominant response? Faster with an audience. New skill, complex task, or unlearned response? Slower with an audience. Any stem that describes a beginner or a first attempt is likely testing the reverse of the classic facilitation story.

Attribution stems recur every year and I see students merge the two concepts almost every time we cover Unit 4. They aren't the same thing.

Fundamental attribution error is one-way: when you explain someone else's behavior, you overweight their traits and underweight the situation. Actor-observer bias is the flip in a single scenario: for the other person you reach for traits, for yourself you reach for the setting. If a stem gives you one perspective (an observer judging someone else), it's usually testing fundamental attribution error. If a stem shows the same person judging both someone else and themselves, and they use different explanations for each, it's testing actor-observer. The commuter in Question 1 of the pack does the second, not the first.

Conformity vignettes routinely turn on one word in the stem, and students commonly reach for "peer pressure" as a catch-all without distinguishing the two mechanisms the CED names. The CED cares about the distinction.

Normative social influence is about fitting in: the person publicly agrees with a group to be accepted, while their private view may differ. Informational social influence is about being accurate: the person adopts the group's view because they believe the group has better information than they do. Read the stem for the reason the person gave. "I did not want to stand out" or "I did not want to be the odd one out" points to normative. "Everyone else seemed to know what they were doing" or "the group seemed to have better information" points to informational. Obedience, by contrast, is about a direct order from a legitimate authority figure, not about peer influence at all.

Here's a question straight from the Unit 4 pack. The stimulus: a commuter is running late on the subway platform when another passenger accidentally bumps into her and spills coffee on her jacket. She thinks to herself, "What a careless person." Later that same day, she trips over her own bag and spills water on a coworker, and thinks, "The floor is so uneven near this desk."

The stem: "The commuter's judgment about the passenger who bumped into her, compared with her explanation of her own later spill, is the clearest example of which pattern?"

• (A) Just-world thinking, which is the belief that people generally receive the outcomes they truly deserve.
• (B) Self-serving bias, in which people credit success to their own skill and blame outside factors when they fail.
• (C) Actor-observer bias, in which people explain others' behavior with traits and their own behavior with the setting.
• (D) Mere-exposure effect, in which repeated contact with a specific stimulus tends to increase liking for that stimulus.

Answer: C. The commuter attributes the other person's spill to a stable trait ("careless person") while attributing her own spill to the setting ("the floor is uneven"). That flip between traits for others and situation for the self is the actor-observer pattern. A is about deserved outcomes, which the scenario doesn't describe. B is about success and failure judgments (crediting yourself for wins, blaming the setting for losses), not the same-behavior flip in the stem. D is about liking a repeated stimulus, which is unrelated.

Unit 4 stems very often describe the same surface behavior (someone goes along with a group, someone donates to a cause, someone changes their mind) with different reasons underneath. The reason is what fixes the label.

Before you look at the options, underline the sentence in the stem that explains why the person acted. "To fit in" points to normative influence. "Because they thought the group knew better" points to informational influence. "Because an authority told them to" points to obedience. "To reduce tension between two beliefs" points to cognitive dissonance. "Because a small ask came first" points to foot-in-the-door.

If you match the reason to a concept before you read the choices, you'll skip past three near-miss distractors and lock the answer faster.

Source: AP Psychology CED, Topic 4.3.

Unit 4.4 and 4.5 items usually turn on which personality perspective the therapist or researcher is working from. Each perspective has its own core vocabulary and the vocabulary is the tell.

• Humanistic (Rogers, Maslow): unconditional positive regard, self-actualization, the self, growth. If a therapist "accepts the client without conditions" or the stem mentions "reaching potential", the answer is humanistic.
• Psychodynamic: unconscious, early experiences, defense mechanisms, drives outside awareness. If a stem mentions childhood, early experiences, or content outside conscious awareness, it's psychodynamic.
• Social-cognitive (Bandura): self-efficacy, reciprocal determinism, observational learning, the belief in one's own ability. If the stem describes a person, a behavior, and an environment all influencing each other, it's social-cognitive.
• Trait: the Big Five (openness, conscientiousness, extraversion, agreeableness, neuroticism, OCEAN). If the stem gives a questionnaire and personality dimensions, it's trait.

The CED excludes Freud's psychosexual stages and any stage theory of personality, so an option that names stages is almost always wrong. Same for named emotion theories: the label is not testable, but the underlying idea (arousal alone, arousal plus cognition, appraisal) is.

Topic 4.6 loves the intrinsic vs extrinsic split, and the overjustification effect is a favorite trap. The pattern to remember: paying someone to do a thing they already enjoyed can shift the perceived reason for doing it from personal interest to the reward, so pulling the reward often leaves motivation lower than it started.

On a motivation stem, ask two questions in order. First, did the person enjoy the activity before any reward was introduced? If yes, and a reward is now added, watch for overjustification. Second, is the source of the motivation inside the activity (personal interest, curiosity, satisfaction) or outside it (money, grades, pressure from parents)? Inside is intrinsic, outside is extrinsic. Drive-reduction and homeostasis are about biological deficits like hunger or thirst, not about interest or reward, so those are usually wrong on reward-based stems.

Source: AP Psychology CED, Topic 4.6.

I recommend a three-pass method.

• First, an untimed pass: no clock, no pressure, roughly 90 seconds per question. The goal is diagnostic. You want to see whether you can reason from the stimulus at all, and to flag any Unit 4 topics you keep missing.
• Second, a timed pass one week later: 24 minutes for 20 questions, which matches the AP exam pace of about 72 seconds per MCQ (90 minutes across 75 questions).
• Third, a review pass: check the answer key, then revise weak topics on Cognito's AP Psychology notes before you retry the missed questions a week after that.

The gap between passes is where the learning sticks. For general study habits across the whole course, see how to study for AP Psychology.