AP Psychology Unit 3: Development and Learning

Unit 3 covers development and learning: classical and operant conditioning, observational learning, and development across the lifespan. Conditioning questions require you to identify the elements in a described scenario, which is where most marks are lost.

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288 questions7 CED topics100% with a figure
How this unit behaves

What 288 questions on it look like

This is the largest unit in AP Psychology by practice volume — 288 questions against the subject's other units. Weight your revision accordingly.

100% of the questions come with a figure — a graph, diagram or data display. Reading the figure correctly is most of the work before any content knowledge applies.

Operant Conditioning76
Themes and Methods in Developmental Psychology52
Cognitive Development Across the Lifespan47
Classical Conditioning32
Social, Cognitive, and Neurological Factors in Learning32
Social-Emotional Development Across the Lifespan30
Communication and Language Development19

Questions per CED topic.

From the bank

Three real development and learning questions

Drawn from the practice pool, not from the mock papers.

Social-Emotional Development Across the Lifespan · Concept Application · with figure

A toddler explores a playroom while a caregiver sits nearby. When a stranger enters, the toddler moves closer to the caregiver, then returns to exploring after being comforted. Which interpretation best fits the behavior?

  1. AThe caregiver is being used as a secure base for exploration and reassurance.correct
  2. BThe toddler has completed formal operational reasoning.
  3. CThe toddler has learned language only through imitation of adult grammar.
  4. DThe stranger has become an unconditioned stimulus.
Why A is correct

The behavior shows exploration balanced with caregiver reassurance.

secure attachment explains the evidence in "A toddler explores a playroom while a caregiver sits nearby.". The credited option, "The caregiver is being used as a secure base for exploration and reassurance", is supported because Exploring while returning for comfort is consistent with secure attachment behavior. "The toddler has learned language only through imitation of adult grammar" is a real-looking alternative, but The observation is about attachment, not language learning; "The stranger has become an unconditioned stimulus" also fails because The stranger may be new, but the scenario does not make the stranger an unconditioned stimulus. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.

Common mistakes. "The toddler has learned language only through imitation of adult grammar" answers a different issue from the one being tested. "The stranger has become an unconditioned stimulus" also drifts, since the stranger may be new, but the scenario does not make the stranger an unconditioned stimulus.

Cognitive Development Across the Lifespan · Concept Application · with figure

A child says that a tall, narrow glass has more juice than a short, wide glass even after watching the same juice poured from one container to the other. Which concept best explains the child's error?

  1. AThe child is showing object permanence by searching for a hidden toy.
  2. BThe child focuses on one dimension and misses the transformation.correct
  3. CThe child is using a variable-ratio schedule to maintain behavior.
  4. DThe child is demonstrating retroactive interference from new learning.
Why B is correct

The child does not yet coordinate height and width to conserve volume.

"A child says that a tall, narrow glass has more juice than a short, wide glass even after watching the same..." details toward cognitive development, not just a familiar Development and Learning label. The credited option, "The child is focusing on one visible dimension and not coordinating the transformation", is supported because The child centers on height and fails to conserve quantity. "The child is demonstrating retroactive interference from new learning" is a real-looking alternative, but No memory interference pattern is described; "The child is showing object permanence by searching for a hidden toy" also fails because Object permanence concerns knowing an object exists when out of sight. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.

Common mistakes. The tempting shortcut is to grab child is demonstrating retroactive; that misses the item because no memory interference pattern is described. A second shortcut, child is showing object, fails because object permanence concerns knowing an object exists when out of sight.

Communication and Language Development · Concept Application · with figure

A preschooler says 'I goed to the park' after correctly saying 'I went' many times before. What does this error most strongly suggest about language development?

  1. AThe child has lost the ability to form any past-tense sentence.
  2. BThe child is showing sensory adaptation to repeated speech sounds.
  3. CThe child overapplies a grammar rule instead of only copying phrases.correct
  4. DThe child has entered a sleep stage marked by rapid eye movements.
Why C is correct

The child is overapplying a rule, which supports active language learning.

overregularization is the mechanism that makes "A preschooler says 'I goed to the park' after correctly saying 'I went' many times before." coherent. The credited option, "The child is applying a grammatical rule too broadly rather than only copying phrases", is supported because Overregularization shows active rule use, even when the rule is applied incorrectly. "The child has lost the ability to form any past-tense sentence" is a real-looking alternative, but The error does not mean all past-tense ability is lost; "The child is showing sensory adaptation to repeated speech sounds" also fails because Sensory adaptation is unrelated to grammar. The aim is to connect the concrete evidence to the psychological mechanism, then reject choices that shift the process, time frame, or research logic away from the scenario pattern.

Common mistakes. "The child has lost the ability to form any past-tense sentence" is the first trap: The error does not mean all past-tense ability is lost. "The child is showing sensory adaptation to repeated speech sounds" is different but still misses the task because sensory adaptation is unrelated to grammar.

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FAQ

Development and Learning questions

How do I tell classical from operant conditioning?

Classical pairs a stimulus with a reflexive response. Operant changes the frequency of a voluntary behaviour through its consequences.

What is negative reinforcement?

Removing something unpleasant to increase a behaviour. It is not punishment — reinforcement always increases the behaviour.
Last reviewed 2026-08-28. Unit and topic names follow the College Board course framework. Question counts describe the PrepScore practice bank, not the exam.
Topic by topic

Worked questions by topic

6 of this unit’s topics have enough practice questions for a page of their own.

Themes and Methods in Developmental Psychology52 questionsCognitive Development Across the Lifespan47 questionsSocial-Emotional Development Across the Lifespan30 questionsClassical Conditioning32 questionsOperant Conditioning76 questionsSocial, Cognitive, and Neurological Factors in Learning32 questions
Same course
Unit 1: Biological Bases of Behavior288 questionsUnit 2: Cognition288 questionsUnit 4: Social Psychology and Personality288 questionsUnit 5: Mental and Physical Health288 questions

Practise development and learning until the reasoning is automatic.

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