The ________ approach to classroom learning designed by Aronson and his colleagues takes advantage of the six principles of effective contact between groups

At about ___ months of age, children demonstrate that their attachment to their primary caregiver(s) has peaked

A) 2-6 B) 6-8 C) 9-12 D) 12-18

Recent research has confirmed Piaget's belief that children are egocentric through the entire preoperational stage

Indicate whether this statement is true or false.