MCAT, Medical exams

Psychological, Social, and Biological Foundations of Behavior

This section tests introductory psychology and sociology alongside the biological bases of behavior, organized under Foundational Concepts 6 through 10. It asks how people sense and interpret the world, how behavior is learned and changed, how identity and social interaction operate, and how social structure and inequality shape well-being and health. Terminology precision matters more here than anywhere else on the exam, because many questions turn on distinguishing closely related named concepts. Passages often present study results, so research-design and statistical reasoning appear alongside the content.

Position: 4 of 4 sections
Questions: 59 questions
Time: 95 minutes
Topics covered: 10 topics in this guide

What is covered

Topics inside this section.

These topics describe the scope students most often review for this part of MCAT. Treat them as a study checklist rather than an exhaustive list of what a single exam form can sample.

Sensation and perception: Sensory receptors, thresholds, and the pathways that carry signals, plus how perception organizes them. Pair each sense with its receptor and its cortical destination in a single card.
Cognition, memory, and language: Problem solving, decision-making heuristics, memory encoding and retrieval, and language development. Learn the named biases and memory failures by example, since stems describe rather than name them.
Emotion, stress, and consciousness: Theories of emotion, stress appraisal and response, sleep stages, and altered states of consciousness. Keep the competing emotion theories in one comparison table you can rebuild from memory.
Individual influences on behavior: Biological bases of behavior, personality theories, motivation, and psychological disorders. Attach each personality framework to its central claim rather than to a list of terms.
Learning, attitudes, and behavior change: Classical and operant conditioning, observational learning, attitude formation, and persuasion models. Reinforcement schedules and the routes to persuasion reward exact, not approximate, recall.
Social processes and group behavior: Conformity, obedience, group decision-making, socialization, and cultural transmission. Learn the classic study behind each named effect; passages often reconstruct one.
Self-identity and self-concept: Self-esteem, self-efficacy, locus of control, and theories of identity formation across the lifespan. Distinguish the identity theories carefully, because they are prime look-alike material.
Social thinking and social interaction: Attribution, stereotypes, prejudice and discrimination, attraction, aggression, and altruism. Practice separating attitude-level from behavior-level constructs, which stems deliberately blur.
Social structure and institutions: Theoretical approaches to society, plus education, family, religion, government, and medicine as institutions. Know what functionalism, conflict theory, and symbolic interactionism each predict.
Demographics, social inequality, and health disparities: Population characteristics and change, social stratification, and how access to resources shapes health outcomes. Connect each concept to a concrete health example, which is how this material is framed on the exam.

Study tips

How to practice Psych/Soc.

Section-specific guidance that follows from how this material is usually tested.

Build flashcards that force discrimination between look-alike terms — assimilation versus accommodation, role strain versus role conflict — because telling them apart is exactly what is tested.
Tie every sociology concept to a health or health care example; passages here are routinely framed around access, disparity, and outcomes.
Do not skip the biology in this section; neuroanatomy, neurotransmitters, and endocrine influence on behavior are fair game.
Practice timed passage sets even though the reading feels approachable, since the pacing risk here is over-reading rather than difficulty.
Review the research-methods vocabulary — sampling, validity, confounding, and basic statistics — as content you can be questioned on directly.

Where this fits

Psychological, Social, and Biological Foundations of Behavior is 4 of 4 sections in the MCAT guide. Use the full guide to balance it against everything else you have to review.

Back to the MCAT guide Official exam information

Sample Psych/Soc questions

Practice questions, not yet expert-reviewed

Original practice questions written to the published framework for this section. No expert has reviewed them, and they are not taken from any official exam. Try each one before you open the answer.

Question 1Foundational
Which form of learning changes the frequency of a voluntary behavior through reinforcement and punishment that follow it?
1. AClassical conditioning
2. BOperant conditioning
3. CHabituation
4. DObservational learning
Show answer
Answer: B. Operant conditioning
Operant conditioning shapes voluntary behavior through its consequences, with reinforcement making a behavior more likely and punishment making it less likely. Classical conditioning is the tempting distractor, but it pairs a neutral stimulus with a stimulus that already produces an involuntary response, so the learning happens before the behavior rather than after it.
Key insight: Consequences after a voluntary act mean operant; paired stimuli before a reflexive response mean classical.
Question 2Foundational
Which schedule of reinforcement produces the highest, steadiest rate of responding and the greatest resistance to extinction?
1. AFixed ratio
2. BVariable ratio
3. CFixed interval
4. DVariable interval
Show answer
Answer: B. Variable ratio
Reinforcing an unpredictable number of responses keeps the next reward always potentially one response away, which sustains rapid steady responding and makes extinction slow. Fixed ratio is the tempting distractor because it also produces high rates, but its predictable payout creates a pause right after each reinforcement.
Key insight: Ratio schedules drive rate and variable schedules resist extinction, so variable ratio maximizes both.
Question 3Intermediate
What is the name for the tendency to explain another person's behavior by their personality or character while underweighting the situational pressures acting on them?
1. AFundamental attribution error
2. BSelf-serving bias
3. CJust-world hypothesis
4. DHalo effect
Show answer
Answer: A. Fundamental attribution error
The fundamental attribution error is the systematic overuse of dispositional explanations for other people's behavior at the expense of situational ones. Self-serving bias is the tempting distractor, but it concerns explanations of one's own outcomes, crediting success to ability while blaming failure on circumstances.
Key insight: Judging others by disposition is the fundamental attribution error; excusing yourself by circumstance is self-serving bias.
Question 4Intermediate
Which sociological theoretical approach analyzes society as a system of interdependent parts, each of which serves a function that maintains social stability?
1. AFunctionalism
2. BConflict theory
3. CSymbolic interactionism
4. DSocial exchange theory
Show answer
Answer: A. Functionalism
Functionalism treats institutions such as family, education, and medicine as organs of a larger system whose functions keep society stable. Conflict theory is the tempting distractor, but it reads the same institutions as arenas where groups with unequal power compete over scarce resources, so it emphasizes change rather than equilibrium.
Key insight: Functionalism asks what an institution does for the whole; conflict theory asks whom it benefits.
Question 5Advanced
Which term describes the tension a person experiences from competing obligations that all belong to one single social role?
1. ARole strain
2. BRole conflict
3. CRole exit
4. DRole performance
Show answer
Answer: A. Role strain
Role strain is difficulty meeting the incompatible demands contained within a single role, such as a professor expected to teach heavily and publish constantly. Role conflict is the tempting distractor and is the classic look-alike, but it arises between two different roles, such as being a parent and an employee at the same time.
Key insight: Strain happens inside one role; conflict happens between two roles.

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Psychological, Social, and Biological Foundations of Behavior