According to the DSM's multiaxial system, on which axis does a diagnosis of mental retardation appear?

Piaget's stage of cognitive development that has substages of primary circular reactions, tertiary circular reactions, and secondary schemata is

A. formal operational B. preoperational C. concrete operational D. sensorimotor

In a study comparing Japanese and Americans, the Japanese reported that their sense of self, in different situations, changes

a. 5 percent to 10 percent. b. 20 percent to 30 percent. c. 55 percent to 59 percent. d. 90 percent to 99 percent.