A child is shown two identical balls of clay, sees one of them rolled into a rod shape, and is then asked which ball contains more clay. This child is being tested for an understanding of _____________?

Correct answer: B. conservation of substance

  • A. object permanence
  • B. conservation of substance
  • C. the reversibility of actions
  • D. logical possibilities

Explanation

The clay task tests conservation of substance: the amount remains the same despite a change in shape. This ability generally develops during Piaget’s concrete operational stage.

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