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 ...

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 ...