If a person sees a victim in dire need, but doesn't know how to help, that person will most likely:
a) stay with the victim.
b) do nothing.
c) go for help.
d) attempt to offer first aid.
ANS: B, Knowing what to do is one of the steps in deciding to render aid in an emergency.
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Harlow's studies of surrogate monkey mothers showed that
a. infant monkeys preferred the terry cloth surrogate only when it was the source of food. b. the wire surrogate was preferred because of its association with food. c. when frightened, the infant monkeys ran to the terry cloth surrogates for security and comfort. d. the attachment shown to the wire feeding mothers was identical to that displayed toward real monkey mothers.
On the basis of twin studies and other kinship evidence, researchers estimate that about __________ of the differences in IQ among children can be traced to their genetic makeup
A) a quarter B) a third C) half D) two-thirds