Michael is playing ball with his father when the ball rolls under the sofa.Michael turns his attention to another toy,not even attempting to look under the sofa for the ball.Piaget would say that Michael has:

Question

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According to Piaget's theory of cognitive development, children develop object permanence around the age of 8 to 9 months, which means they understand that objects continue to exist even when they cannot be seen or heard. If Michael did not attempt to look for the ball under the sofa, it suggests that he has not yet developed object permanence.

Michael Is Playing Ball with His Father When the Ball