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 ...

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 ...

One must understand that object permanence is not a clinically recognized problem in adults suffering from ADHD Object permanence is an old psychological concept coined by Swiss psychologist Jean ...

When do children start to understand something still exists even though they can’t see or hear it – and what activities will they enjoy doing at this time? By Ruth Thomson Object permanence means a ...