Philip watches his mom put his favorite toy underneath his blanket. When the toy is not visible Philip loses interest and does not know where the toy is. Based on this scenario, we can assume that Philip:

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Philip's behavior indicates that he has not yet developed a sense of object permanence, which is the ability to understand that objects continue to exist even when they are out of sight. This is a common developmental milestone that infants typically acquire between 6 and 8 months of age.

Philip Watches His Mom Put His Favorite Toy Underneath His