Three layers called the ectoderm, mesoderm, and endoderm form in the developing organism during the period of the

Which theorist claimed that experiences leave a permanent imprint on the brain

a) Freud b) Aristotle c) Penfield d) Ebbinghaus

Four-year-old Regis is learning to tie his own shoes. To help keep him on task, he talks to himself. For instance, he says, "First you make a knot. Then you make a loop." Regis' use of self talk is called

a. private speech. c. egocentric speech. b. social speech. d. self talk.