Which of the following statements is supported by research on babbling?
A) Babies only begin babbling if they consistently hear human speech.
B) Females typically begin babbling before males.
C) Babies have a limited repertoire of babbled sounds, depending on their IQ.
D) Deaf infants not exposed to sign language will stop babbling entirely.
D
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An employee who always goes above and beyond what his or her employer asks is demonstrating good _____
a. task performance b. organizational citizenship behavior c. situational judgment d. counterproductive behavior
How does a PET scan provide information about the functioning of the brain?
a) A computer interprets X-rays. b) It makes a record of radio waves directed to the brain. c) It monitors the radioactivity level of different areas of the brain. d) It records electrical activity from electrodes placed on the skull surface.