Yuri is the mother of 3-year-old Decha. Yuri shows Decha two equal balls of Play-Doh and determines that he views them as both the same. She then rolls one of the balls into a long 'snake' and asks Decha if the amounts of clay are still the same or if one is different. Decha replies, "The snake has more Play-Doh now!" Decha's reply indicates that he does not yet understand _____.

Question

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Decha's response shows that he has not yet developed an understanding of conservation, which is the ability to understand that even if the shape or appearance changes, the amount of a substance remains the same. This is a key developmental milestone in Piaget's theory of cognitive development. Decha is not demonstrating a lack of understanding of animism, centration, or symbolic language in this scenario.

Yuri Is the Mother of 3-Year-Old Decha