Peer relationships, school, and dealing with the demands of their environment are the main focus for the majority of children in which of the following age groups?

Meg has severe mental retardation, but can play any musical piece on the piano after hearing it only once. Her behavior is an example of ______ performance

a. profound c. savant b. Mensa d. paradoxical

________________ studies the relationship between physical energies and psychological experiences

a. Physiology b. Psychophysics c. Psychometrics d. Psychopathology