Ψ One of the most important cognitive accomplishments of infancy is the ability to understand that objects & people exist independently of one's perception of them even when hidden from sight. (object permanence)
Ψ One way to test for awareness of object performance is to use dynamic perception - specifically to asses whether an infant will search for an object that is hidden in their presence.
Ψ Renee Baillargeon did extensive experimentation on object permanence which proved that infants understand this concept months before they demonstrate it on Piaget's hidden object task.
Growth & Development|
Robert C. Gates