Animal studies indicate that the effect of serotonin on aggression may reflect a more general effect of serotonin on
A) cognitive function.
B) risky behaviors.
C) threat behavior.
D) maternal behavior.
E) learning and memory.
Answer: B
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Distribution-free tests are
a. more sensitive to the effects of outliers than parametric tests. b. more sensitive to the effects of scores near the mean than parametric tests. c. largely unaffected by the presence of outliers. d. both a and c
Which of the following can often lead to experimenter bias?
A. expectancy effects B. manipulation checks C. sensitivity effects D. range effects
Sigmund Freud developed which of the following modern approaches?
a. behavioral c. humanistic b. cognitive d. psychoanalytic
Assuming a large standard deviation, as the sample size increases:
a. the less likely it is that nonprobability sampling is appropriate. b. the more likely it is that nonprobability sampling is appropriate. c. sample error increases. d. sample error decreases.