Why do babies love peekaboo so much? It may be because when you hide your face, they think it has ceased to exist. That’s according to Swiss psychologist Jean Piaget’s theories about “object ...

Things continue to exist even when we can’t see them, but until we’re old enough to understand that notion, it’s out of sight, out of mind. Object permanence is one of those things we figure out when ...

Fifteen years ago, textbooks on human development stated that babies of six months of age or younger had no sense of "object permanence" -- the psychological term that describes an infant's belief ...

The work of Jean Piaget shaped our understanding of cognitive development in children, and it also gave us several tasks that we can use to study other animals. One classic issue studied by Piaget is ...

Developmentalists have overlooked the fundamental problem of the real impermanence of things. The question of the development of the rational understanding of impermanence is as yet unposed, despite ...

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