Study guide
This chapter is educational content only, not medical advice, and does not guarantee any exam outcome. It follows the AAMC content outline's integration of psychology, sociology, and biology to explain behavior, from neurons and sensation to group dynamics and social structure, again delivered through a research-based passage typical of this section's format.
Passage: A Social-Cognition and Learning-Theory Study
A research team led by Dr. Priya Nakamura studies how observers judge the cause of a stranger's behavior. In one experiment, participants watch a video of a man, described only as 'Tom,' who trips while walking down a crowded sidewalk. Half the participants are told Tom is a stranger; the other half are told Tom is a close friend of the participant. Participants rate how much they attribute the fall to Tom's personal clumsiness (a dispositional attribution) versus the uneven pavement (a situational attribution). Participants judging a stranger attribute the fall more to Tom's own clumsiness, a pattern consistent with the fundamental attribution error, the tendency to overweight dispositional causes and underweight situational causes when explaining others' behavior; participants judging a friend show a smaller version of this bias, illustrating how the fundamental attribution error weakens as social closeness and familiarity increase, since observers more readily grant situational explanations to people they know well. In a second experiment, the team studies learned behavior in a different sample: children who watch an adult model either play gently with a toy or aggressively strike it. Children who observed the aggressive model reproduce more aggressive actions toward the same toy when given the chance, even without direct reinforcement, a finding consistent with Albert Bandura's social learning theory (also called observational learning), which holds that behavior can be acquired by watching a model and later imitating that behavior, particularly when the model is perceived as similar, high-status, or rewarded for the behavior. In a third experiment, the team pairs a neutral tone with a mild puff of air to the eye (which naturally triggers a blink) across repeated trials; after conditioning, the tone alone triggers a blink, a classic classical conditioning result in which the tone (initially a neutral stimulus) becomes a conditioned stimulus producing a conditioned response, paralleling Pavlov's original paradigm pairing a bell with food to produce salivation.
Questions 1-4 (Passage-Based)
1. The pattern observed when participants judged a stranger's fall (attributing it more to clumsiness than to the sidewalk) illustrates: (A) classical conditioning (B) the fundamental attribution error (C) observational learning (D) operant conditioning. The passage explicitly names this pattern as 'consistent with the fundamental attribution error,' matching (B); this is a comprehension-level question requiring only reading the passage's own labeled explanation. 2. Based on the passage, why did the bias weaken when participants judged a close friend rather than a stranger? (A) friends never trip (B) social closeness reduces the tendency to overweight dispositional explanations, a weakening of the fundamental attribution error described in the passage (C) situational attributions are always correct for friends (D) the passage does not address this. The passage states the smaller bias for friends illustrates how 'the fundamental attribution error weakens as social closeness and familiarity increase,' directly supporting (B). 3. The children's imitation of the aggressive model, without any direct reward to the children themselves, best illustrates: (A) classical conditioning (B) social learning theory (observational learning) (C) the fundamental attribution error (D) Hardy-Weinberg equilibrium. The passage explicitly labels this result as 'consistent with Albert Bandura's social learning theory (also called observational learning),' matching (B); note reinforcement of the model, not the child, can still support learning under this theory. 4. In the third experiment, after conditioning, the tone functions as the: (A) unconditioned stimulus (B) unconditioned response (C) conditioned stimulus (D) conditioned response. The passage states the tone 'becomes a conditioned stimulus producing a conditioned response,' directly supporting (C); the air puff is the unconditioned stimulus and the reflexive blink to the air puff is the unconditioned response, while the blink to the tone alone is the conditioned response.
Biological Bases of Behavior: Neurons, Sensation, and the Nervous System
Behavior begins with the nervous system's basic signaling unit, the neuron, which receives input through dendrites, integrates signals at the cell body, and (if the summed input depolarizes the membrane past threshold) fires an action potential that travels down the axon. The action potential is an all-or-none electrical signal driven by voltage-gated sodium and potassium channels: sodium channels open first, causing rapid depolarization, and potassium channels then open as sodium channels inactivate, repolarizing the membrane. At the axon terminal, the electrical signal triggers calcium influx, prompting synaptic vesicles to release neurotransmitter into the synaptic cleft; the neurotransmitter binds receptors on the postsynaptic neuron, producing either an excitatory postsynaptic potential (making firing more likely) or an inhibitory postsynaptic potential (making firing less likely), depending on the receptor and neurotransmitter involved. Key neurotransmitters have characteristic roles: dopamine is heavily involved in reward and motivation circuits, serotonin influences mood and is a target of many antidepressant medications, acetylcholine operates at the neuromuscular junction and in memory-related circuits, and GABA is the primary inhibitory neurotransmitter in the brain. The nervous system divides broadly into the central nervous system (brain and spinal cord) and peripheral nervous system, which further splits into the somatic division (voluntary motor control and sensory input) and autonomic division, itself divided into sympathetic (fight-or-flight activation, increasing heart rate and diverting blood to skeletal muscle) and parasympathetic (rest-and-digest, promoting digestion and lowering heart rate) branches that generally act in opposition to maintain homeostasis. Sensation begins when a stimulus activates specialized sensory receptors, transducing physical or chemical energy into electrical signals, with sensory thresholds (the minimum stimulus intensity reliably detected) and adaptation (reduced response to a constant, unchanging stimulus) shaping how perception differs from raw physical stimulus intensity.
Social Structure, Stratification, and Group Behavior
Sociology contributes a set of concepts describing how social position and group membership shape behavior and life outcomes. Social stratification refers to a society's hierarchical arrangement into layers based on unequal access to wealth, power, and prestige, and sociologists distinguish class (an economically defined position, often tied to income, wealth, and occupation), status (the social honor or prestige attached to a position), and power (the capacity to achieve goals despite resistance, per Max Weber's classic three-part framework). Social mobility describes movement between strata, which can be intergenerational (comparing a person's position to their parents') or intragenerational (change within one person's lifetime), and can be upward or downward. Socioeconomic status (SES), typically measured by some combination of income, education, and occupation, correlates with numerous outcomes studied on the exam, including health disparities, access to healthcare, and educational attainment, though the exam expects you to reason about mechanisms and associations described in a passage rather than to assume causation from correlation alone. Group behavior is shaped by structural and situational forces: social facilitation describes improved performance on simple or well-learned tasks in the presence of others (and impaired performance on complex or novel tasks, an effect sometimes called social inhibition); groupthink describes a flawed group decision-making process in which the desire for consensus overrides realistic appraisal of alternatives, often worsened by high group cohesion and insulation from outside opinions; and social facilitation aside, deindividuation describes a loss of individual self-awareness and accountability in group or crowd settings, associated with increased conformity to group norms, including antisocial ones. Socialization, the lifelong process by which individuals learn the norms, values, and behaviors of their culture, occurs through agents including family, peer groups, schools, and media, and helps explain how social structure is reproduced across generations even without any single actor intending that reproduction.
Key terms
- Fundamental attribution error
- — The tendency to overweight dispositional (personality-based) explanations and underweight situational explanations for another person's behavior.
- Social learning theory (observational learning)
- — Albert Bandura's theory that behavior can be learned by observing and imitating a model, without requiring direct reinforcement of the observer.
- Classical conditioning
- — A learning process in which a neutral stimulus, repeatedly paired with an unconditioned stimulus, becomes a conditioned stimulus that elicits a conditioned response.
- Action potential
- — An all-or-none electrical signal along a neuron's axon, generated by sequential opening of voltage-gated sodium and then potassium channels.
- Sympathetic nervous system
- — The autonomic division activating fight-or-flight responses, increasing heart rate and redirecting blood flow to skeletal muscle.
- GABA
- — The primary inhibitory neurotransmitter in the central nervous system, reducing the likelihood of postsynaptic neuron firing.
- Social stratification
- — The hierarchical arrangement of a society into layers based on unequal access to wealth, power, and prestige.
- Socioeconomic status (SES)
- — A composite measure, typically combining income, education, and occupation, associated with health and educational outcomes.
- Groupthink
- — A flawed group decision-making pattern in which the desire for consensus overrides realistic evaluation of alternative courses of action.
- Deindividuation
- — A reduction in self-awareness and personal accountability in group or crowd settings, associated with increased conformity to group norms.
- Social mobility
- — Movement between social strata, classified as intergenerational or intragenerational and as upward or downward.
- Socialization
- — The lifelong process by which individuals learn their culture's norms, values, and behaviors through agents such as family, peers, and schools.
Exam tips
- When a passage names a psychological phenomenon directly (as many social-cognition passages do), answer the comprehension question by locating that label rather than reasoning from first principles.
- Keep classical conditioning's four terms straight by function, not just name: unconditioned stimulus and response occur without learning; conditioned stimulus and response only exist after pairing.
- For nervous system items, work through the sequence in order (dendrite input, threshold, action potential, neurotransmitter release, postsynaptic effect) to locate exactly where a described disruption acts.
- Distinguish sociological concepts that sound similar but differ in mechanism, such as groupthink (consensus-seeking suppresses dissent) versus deindividuation (loss of self-awareness in a crowd) — passages often test the specific mechanism, not just the outcome.
- When a passage reports a correlation between a social variable (such as SES) and an outcome, do not select an answer choice that asserts direct causation unless the passage itself supports that stronger claim.