Question

Fred looks forward to the day when he can play peek-a-boo with his son. at this point, each time he says "peek-a-boo" and hides, baby billy looks bored and turns away. "he just doesn't seem to understand that i still exist when he can't see me. he loses interest." fred is looking forward to the development of

Answer 1

Object permanence. This typically starts to develop between 4-7 months of age. It's the ability to understand that things can levae their sight and that doesn't mean they're gone forever. It is a critical milestone in development.