Case studies:
a. are an accurate method of obtaining experimental data
b. are useful in stimulating research and theory, but not in arriving at reliable conclusions about cause and effect
c. are useful in helping the researcher arrive at conclusions about alternative explanations but not in stimulating research
d. can be replicated in the laboratory
e. are not liable to the research biases
Ans: B
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An association has been found between postpartum depression and infant characteristics. What is a major difficulty involved in interpreting this relationship?
a. There has been no genotype discovered that is directly linked with postpartum depression. b. It cannot be determined if the postpartum depression caused poor infant characteristics or if the poor infant characteristics caused postpartum depression. c. There has been no genotype discovered that is directly linked with poor infant characteristics. d. The mother's and infant's genotype are too closely related to interpret the relationship.
To increase his sample size, Denzell asks parents of children in his study to nominate friends
that might also like to be in the study. This sampling method is known as: A) a sampling frame. B) simple random sampling. C) probability sampling. D) snowball or chain sampling.
Which statement best describes exercise habits in late adulthood?
a. Older adults exercise more often than midlife adults because they have fewer family obligations. b. Eighty-five to ninety-five percent of adults over age 65 never engage in vigorous exercise. c. Doctors don't recommend exercise for this age group. d. Aerobic exercise is not advised because it increases the risk of a heart attack.
Infusion of low doses of __________ will excite neurons.
A. GABA B. glycine C. glutamate D. dopamine