In an experiment on the effects of level of motivation on the performance of typists, the researcher randomly assigned one third of her subjects to each of three levels of motivation (and then induced different levels of motivation in the three groups)
She measured the average words typed per minute by each group, and found that performance was highest under medium motivation, average under low motivation, and worst under high motivation. What was the independent variable in this experiment?
a. motivation
b. typing speed
c. variation in typing speed
d. manipulation of typing speed
a
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Why are heroin users more likely to overdose when they inject heroin someplace other than their usual location?
A) Heroin users tend to inject a larger dose in new locations. B) Heroin users learn to associate safe practices with their usual location. C) Heroin users find drug use more rewarding in new locations. D) Cues that normally trigger a conditioned response that helps to prepare the body for the heroin are missing in the
An ancient treatment for emotional disturbance was:
a) psychoanalysis. b) exorcism. c) lobotomy. d) ECT.