Barley takes each of his toys out of the storage bin and lines them up along the wall of his bedroom. He then thinks to himself, "I have so many more toys now." In which of Piaget's stage of cognitive development does this evaluation represent a cognitive error that children typically correct?

Between the ages of 6 and 12 children strive to develop a sense of competence arising from their work and effort. Erikson refers to this stage of life as

a. trust versus mistrust. b. autonomy versus shame and doubt. c. initiative versus guilt. d. industry versus inferiority. e. identity versus role confusion

After becoming bored with classically conditioning his roommate, Lloyd, to cringe at the sound of a squeaky drawer, Don decides to give Lloyd a break and he repeatedly squeaks the drawer without hitting Lloyd with a ping pong ball. What procedure is Don using?

a. ?spontaneous recovery b. ?acquisition c. ?discrimination d. ?extinction