When she first started using cocaine, Helena really enjoyed the positive feelings that she got from the highs. After some time of using, however, she found that the "lows" that she experienced when she came off of the drug were too unpleasant to bear, and thus she was now using just to avoid experiencing those unpleasant feelings. Helena's cocaine addiction would best be explained from the ________ .
a. substance induced myopia.
b. the opponent-process theory.
c. amotivational syndrome.
d. an expectancy effect.
Answer: b. the opponent-process theory.
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Biological risk research for developmental disorders has identified biological predispositions to be
a. marginal. b. moderate. c. very strong. d. a nonfactor.
Which of the following is true about the size of a probability sample?
A. The larger the sample, the closer it will be to representing the full population. B. The smaller the sample, the closer it will be to representing the full population. C. You should always strive to have an extremely large probability sample. D. You should always strive to have an extremely small and specific probability sample.
A simple, unlearned response to a stimulus that may involve only two neurons is a(n) _______ _______
Fill in the blank(s) with correct word
Which of the following best explains why REM sleep is considered to be “paradoxical”?
A. Because during REM sleep, the eyes are moving but the brain is sleeping B. Because during REM sleep, the brain is the most active while the body is the least active C. Because during REM sleep, the mind is as alert as wakeful periods but the body is resting D. Because during REM sleep, the mind is dreaming but people have difficulty remembering their dreams