According to the discussion of early language production,
a. true babbling involves only vowels.
b. babbling is a form of intentional communication.
c. when infants are 1 month old, their babbling already sounds like the language spoken in their home.
d. intentional communication begins at about 9 months of age.
Ans: d
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Deprivation of REM sleep on one night results in an elevated amount of REM sleep on the following night. This rebound phenomenon suggests that
a. emotional well-being requires slow-wave sleep. b. REM sleep functions to rest the brain. c. there is a physiological need for stage 1 slow-wave sleep. d. there is a physiological need for a certain amount of REM sleep. e. the brain does not regulate REM sleep.