Eight-year-old Eric watches as you flatten one of two equal-sized balls of clay into a pancake. Eric says they both still have the same amount of clay. When he is asked how he knows that the ball and the pancake have the same amount of clay, he points out that the pancake could once again be rolled up into a ball, demonstrating that he

Question

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Eric understands the concept of reversibility, which is a hallmark of the concrete operational stage of cognitive development according to Jean Piaget's theory. This means that Eric can mentally reverse actions and understand that the pancake can be rolled back into a ball, maintaining the same amount of clay as before. This ability to mentally manipulate objects and ideas is a key feature of the concrete operational stage.

Eight-Year-Old Eric Watches as You Flatten One of Two Equal-Sized