Add Yahoo as a preferred source to see more of our stories on Google. Everything you've wanted to know about object permanence, including how to help your baby develop this skill. If you have ever ...

What is cognitive development? Expert Dr Samantha Durrant answers parents' questions around this tricky subject, and how it ...

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 ...

Object permanence, as many will remember from college psychology class, refers to the understanding that things and people continue to exist even when you can’t see or hear them. First documented by ...

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 ...