Cognitive Development Across the Lifespan

AP Psychology· difficulty 3/5

Conservation is the understanding that

A
$Objects continue to exist when out of sight$
B
$Memories remain accessible across the lifespan$
C
$All shapes of equal area weigh the same$
D
$Quantity remains the same despite changes in shape or arrangement$
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Explanation

Classic test: pouring water into different-shaped glasses; mastered in concrete operational stage.

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