Behavior and sex roles are conditioned by

What is an infant's vision at birth?

a) 20/20 b) 20/40 c) 20/200 d) 20/600

Preschoolers generally do not recognize that if 8 - 5 = 3, then 3 + 5 = 8 . This is because their thought is characterized by

a. irreversibility. b. animism. c. egocentrism. d. centration.