Ahmed is a deaf infant who has just begun forming his first signs. His playmate, Alice, can hear and she has just begun to use pointing gestures to communicate. Ahmed and Alice are the same age. How old would you predict Ahmed and Alice to be?

Newborns prefer

a. colored displays. b. black-and-white displays. c. objects that move quickly across their field of vision. d. nonhuman objects.

People deprived of rapid eye movement (REM) sleep:

A) experience paradoxical sleep. B) learn more slowly. C) have fewer chances of experiencing REM rebound. D) spend less time in REM sleep during subsequent sleep periods.