Follow-up research designed to evaluate specific components of Piaget's theory of cognitive development has shown that object permanence emerges earlier than Piaget had suggested.

Question

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Numerous studies have found that infants as young as 3-4 months old exhibit some level of understanding that objects continue to exist even when they are out of sight, which is earlier than Piaget's original estimate of 8-9 months.

Follow-Up Research Designed to Evaluate Specific Components of Piaget's Theory