Cognitive Development Across the Lifespan

Cognitive Development Across the Lifespan is topic 3.4 of AP Psychology, inside Development and Learning. This page works through three real practice questions on it, with the full reasoning behind each credited answer.

Practise this topic freeThe whole unit
47 questionsConcept Application100% with a figure
Worked examples

Three real cognitive development across the lifespan questions

From the practice pool, not the mock papers — each with the reasoning that produces the answer.

100% of them come with a figure. Reading the graph or diagram correctly is most of the work here before any content knowledge applies.

96% test a single AP skill: Concept Application. That makes this topic unusually predictable to prepare for.

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.

Concept Application · with figure

A child can finish a puzzle only when an older sibling gives hints and removes one distracting piece at a time. Which Vygotsky concept is most relevant?

  1. AObject permanence
  2. BZone of proximal developmentcorrect
  3. CHabituation
  4. DDiscrimination
Why B is correct

The child succeeds with guidance in the supported range.

Cognitive Development Across the Lifespan reasoning here starts with "A child can finish a puzzle only when an older sibling gives hints and removes one distracting piece..." and asks what mechanism fits. The credited option, "Zone of proximal development", is supported because The task is possible with support but not yet independently. "Object permanence" is a real-looking alternative, but No hidden object is involved; "Habituation" also fails because No reduced response to repeated stimulation is described. 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.

Concept Application · with figure

A child understands that clay rolled into a long snake contains the same amount as when it was a ball. Which ability is shown?

  1. AConservationcorrect
  2. BEgocentrism
  3. CSecure attachment
  4. DToken economy
Why A is correct

The child recognizes stable quantity despite shape change.

conservation explains the evidence in "A child understands that clay rolled into a long snake contains the same amount as when it was a ball.". The credited option, "Conservation", is supported because The child understands quantity remains the same despite a change in appearance. "Secure attachment" is a real-looking alternative, but No caregiver reunion pattern is described; "Token economy" also fails because No exchangeable reward system is used. 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.

47 questions on this topic, free to start.

Ten a day at no cost. One account covers SAT, ACT and AP.

Start free
Last reviewed 2026-08-28. Topic and unit names follow the College Board course framework. Question counts describe the PrepScore practice bank, not the exam.
Same unit
Operant Conditioning76 questionsThemes and Methods in Developmental Psychology52 questionsClassical Conditioning32 questionsSocial, Cognitive, and Neurological Factors in Learning32 questionsSocial-Emotional Development Across the Lifespan30 questions

Work cognitive development across the lifespan until the reasoning is automatic.

Real AP questions with a full explanation on every answer, and a mistake bank that only clears when you get it right.

Start freeBack to the unit