For example, prelinguistic infants generally can hold about three objects in mind at a time. If you hide toys in a box while an infant watches, she can remember up to three hiding places. However, if you label several toys with a nonsense word like “dax” and several more with “blicket” before hiding them—assigning the toys to categories—the infant can hold up to six objects in mind! This happens even if all six toys are physically identical, strongly suggesting that infants gain the same efficiency benefits from conceptual knowledge that adults do. Conceptual combination plus words equals the
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