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 ...

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 ...

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