Sophisticated neuroscientific tools such as the electroencephalogram, which measures electrical activity of the brain, and functional magnetic resonance imaging, which provides pictures of brain activity, have shown us that dreams
a) occur in REM sleep only.
b) assist us in destroying painful memories.
c) help us understand our experiences and control our emotions.
d) are completely meaningless and useless.
Answer: c) help us understand our experiences and control our emotions.
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The umbilical cord contains
A) two veins and one artery. B) two arteries and one vein. C) two veins and two arteries. D) one vein and three arteries.
Which of the following quasi-experimental within-subjects research designs represents the strategy of testing the same individuals repeatedly over a long period of time, and age of the subjects represents the independent variable?
a. Longitudinal design b. One-group pretest-posttest design c. Interrupted time-series design d. Between-subjects factorial design