Development and Learning
Unit 3 of AP Psychology, worth 15–25% of the exam. 14 questions below, each with the working. Every answer was checked by a second pass before it was published.
Themes and methods of developmental psychology, physical, gender, cognitive and social-emotional development, classical and operant conditioning, social and cognitive learning.
How this unit is tested
Development and learning questions on the AP exam almost always come as short scenarios: a child does something odd, a rat runs a maze, a teenager makes a moral choice. Your first job is to identify what type of question it is — a research design question (longitudinal vs. cross-sectional), a stage-identification question (Piaget, Erikson, Kohlberg), or a conditioning-analysis question (classical vs. operant vs. observational). Match the scenario's details to the theory's defining features rather than just its label.
For conditioning questions, slow down and label each element before answering: is there an involuntary, reflex-like association forming between two stimuli (classical), or is a voluntary behavior being shaped by its consequences (operant)? If a behavior is copied from watching someone else with no direct reinforcement to the observer, it is social/observational learning. For schedules of reinforcement, ask whether the reward depends on a number of responses (ratio) or an amount of time (interval), and whether that number/time is fixed or variable.
For the developmental theories, memorize each theorist's central claim in one sentence and the concrete evidence for it (Piaget's conservation tasks, Harlow's cloth-mother monkeys, Ainsworth's Strange Situation, Bandura's Bobo doll). The exam rewards students who can apply a stage or concept to a new example, not just recite the stage names in order.
Finally, practice writing a one-line justification for every answer, since free-response questions on this unit typically ask you to apply a term to a scenario and explain why it fits — the explanation is graded as heavily as the label itself.
What you have to know
Classical conditioning (Pavlov)
An unconditioned stimulus (UCS) naturally triggers an unconditioned response (UCR). When a neutral stimulus (NS) is repeatedly paired with the UCS, it becomes a conditioned stimulus (CS) that triggers a conditioned response (CR) on its own.
Operant conditioning (Skinner)
Behavior is shaped by its consequences: reinforcement (positive = adding a stimulus, negative = removing a stimulus) increases the frequency of a behavior, while punishment (positive = adding a stimulus, negative = removing a stimulus) decreases it.
Schedules of reinforcement
Fixed-ratio: reward after a set number of responses. Variable-ratio: reward after an unpredictable number of responses (most resistant to extinction). Fixed-interval: reward for the first response after a set time. Variable-interval: reward for the first response after an unpredictable time.
Piaget's stages of cognitive development
Sensorimotor (birth–2, object permanence develops); Preoperational (2–7, egocentrism, lacks conservation); Concrete operational (7–11, conservation and logical thought about concrete objects); Formal operational (11+, abstract and hypothetical reasoning).
Erikson's psychosocial stages
Development proceeds through eight age-linked crises, each resolved along a spectrum from a positive to a negative outcome, e.g., trust vs. mistrust in infancy, identity vs. role confusion in adolescence, generativity vs. stagnation in middle adulthood.
Kohlberg's levels of moral development
Preconventional morality is based on avoiding punishment or gaining reward; conventional morality is based on social rules and approval; postconventional morality is based on self-defined, internalized ethical principles.
14 practice questions
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A researcher tests memory in 20-, 40-, and 60-year-olds all within the same month rather than following one group over decades. What design is this, and what is its main limitation?
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Answer. Cross-sectional design; its main limitation is that differences between age groups may reflect cohort effects (generational differences) rather than true developmental change.
Cross-sectional designs compare different people of different ages at one point in time, which is fast but confounds age with the generation each group grew up in. Longitudinal designs avoid this by tracking the same individuals over time, at the cost of time and participant attrition. -
During prenatal development, a mother's heavy alcohol use can cause fetal alcohol syndrome. What general term describes any external agent, like alcohol, that can cause abnormal prenatal development?
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Answer. A teratogen.
Teratogens include substances like alcohol, drugs, and certain diseases that cross the placenta and disrupt normal fetal development, with effects varying by the timing and amount of exposure. -
A 4-year-old watches water poured from a short, wide glass into a tall, narrow glass and insists there is now 'more' water, even though the amount hasn't changed. Which Piagetian stage does this illustrate, and what cognitive limitation is at play?
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Answer. Preoperational stage; the child lacks conservation, the understanding that quantity stays the same despite changes in appearance.
Preoperational children focus on the most visually striking dimension (the water's height) rather than mentally reversing the pouring action, so they fail conservation tasks that concrete operational children can pass. -
According to Vygotsky, the range of tasks a child cannot yet do alone but can accomplish with guidance from a more skilled person is called the:
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Answer. Zone of proximal development
Vygotsky emphasized that cognitive growth is driven by social interaction; the support a more skilled partner provides within this zone is called scaffolding. -
According to gender schema theory, how do children come to understand and enact gender roles?
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Answer. They actively organize information about male and female traits and behaviors into mental frameworks (schemas), based on cultural definitions, and then adjust their own behavior to match those schemas.
This theory blends cognitive and social learning ideas: children are not just told how to act, they build a mental category system for gender and use it to interpret and guide their own behavior. -
In Harry Harlow's experiments, infant rhesus monkeys given a choice between a wire 'mother' providing food and a soft cloth 'mother' providing no food overwhelmingly preferred the cloth mother. What did this demonstrate about attachment?
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Answer. Contact comfort, not just feeding, is a primary basis of attachment.
Harlow's findings challenged the idea that attachment forms purely because a caregiver provides food, showing that warmth and physical comfort are central to the infant-caregiver bond. -
In Ainsworth's Strange Situation, a child becomes very distressed when the caregiver leaves, but on reunion alternates between seeking contact and angrily resisting comfort. Which attachment style does this describe?
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Answer. Resistant/ambivalent
Resistant/ambivalent children show intense distress at separation and mixed, hard-to-soothe reactions at reunion, unlike secure children who are easily comforted or avoidant children who show little distress at all. -
According to Erikson, adolescents are primarily working through which psychosocial crisis?
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Answer. Identity vs. role confusion.
Erikson proposed that the central task of adolescence is developing a coherent sense of self; failing to resolve this crisis leaves the person confused about their values, goals, and social role. -
A teenager decides not to cheat on a test, not from fear of getting caught but because he has personally reasoned that honesty is a fundamental principle he values, even when it conflicts with school policy. This reflects which level of Kohlberg's moral development?
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Answer. Postconventional
Postconventional moral reasoning is based on self-chosen, internalized ethical principles rather than external rules or a desire for social approval, which distinguishes it from the conventional level. -
In Watson and Rayner's Little Albert study, a white rat (initially neutral) was repeatedly paired with a loud, frightening noise until Albert cried at the sight of the rat alone. What serves as the conditioned stimulus (CS) in this study?
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Answer. The white rat.
The rat began as a neutral stimulus but, through repeated pairing with the loud noise (the UCS), became a conditioned stimulus capable of triggering fear (the CR) on its own. -
A slot machine pays out after an unpredictable number of pulls, keeping gamblers pulling the lever steadily for long stretches. Which schedule of reinforcement is this, and why is it so resistant to extinction?
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Answer. Variable-ratio schedule; it is resistant to extinction because the unpredictability of reward keeps the organism responding at a high, steady rate since any given pull might pay off.
Because rewards on a variable-ratio schedule are tied to an unpredictable number of responses, there is no reliable pattern signaling 'no reward is coming,' so the behavior persists even during long stretches without payoff. -
A teenager loses phone privileges for missing curfew (grounding), and separately begins buckling her seatbelt every time because doing so stops the car's annoying beeping sound. Which pair correctly labels these two consequences?
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Answer. Grounding is negative punishment; buckling the seatbelt is negative reinforcement.
Grounding removes a desired stimulus (phone access) to decrease late behavior, making it negative punishment. Buckling the seatbelt removes an aversive stimulus (the beeping) and increases the behavior, making it negative reinforcement. -
In Bandura's Bobo doll experiment, children who watched an adult model hit and kick an inflatable doll were later more likely to act aggressively toward the doll themselves, even without being reinforced for doing so. What does this demonstrate?
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Answer. Observational learning (modeling): behaviors can be learned by watching and imitating others, without any direct reinforcement to the learner.
This study is the classic evidence for social learning theory, showing that reinforcement is not required for learning to occur, only for the behavior to be performed. -
Rats allowed to explore a maze freely with no reward later learned to run it correctly almost immediately once food was placed at the end, performing as well as rats that had been reinforced all along. What is this phenomenon called?
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Answer. Latent learning.
Tolman's experiment showed that the rats had formed a cognitive map of the maze during unreinforced exploration; the learning was present but hidden until there was an incentive (food) to demonstrate it.
What people get wrong
- Treating 'positive' and 'negative' in operant conditioning as 'good' and 'bad.' Instead, remember positive means adding a stimulus and negative means removing one, regardless of whether the outcome is pleasant.
- Confusing classical and operant conditioning in a scenario. Instead, check whether the behavior is an involuntary reflex being paired with a new stimulus (classical) or a voluntary behavior being shaped by consequences that follow it (operant).
- Mixing up variable-ratio and variable-interval schedules. Instead, ask what determines the reward: number of responses (ratio) or elapsed time (interval); remember variable-ratio produces the highest, steadiest response rate and greatest resistance to extinction.
- Assuming Piaget's stage ages are rigid boundaries. Instead, identify the stage by the cognitive ability or limitation shown (e.g., lack of conservation, egocentrism), since exam scenarios test the behavior, not just the age.
- Confusing cross-sectional and longitudinal designs. Instead, check whether different people of different ages are tested once (cross-sectional, risks cohort effects) or the same people are tested repeatedly over time (longitudinal, risks attrition).
Drill this unit until it sticks
These questions come back on a schedule built from what you get wrong, alongside the rest of AP Psychology. Free, and no account needed to start.