When investigators plan clinical research,
a. they must ask people if they would be willing to be in a placebo group.
b. they have to evaluate the ethics of withholding treatment or providing nonstandard treatment to people.
c. they typically do not have to consult with an IRB because the IRB does not deal with clinical research.
d. they are allowed to study only those treatments that have been shown to be effective in treatments.
Question 2
The logic of an experiment is that when one group that experiences an experimental manipulation and another group does not, any differences in subsequent behavior are due to the independent variable.
This conclusion is true when
a. both groups are comparable at the beginning of the study.
b. the control group and the placebo group experience the same manipulation.
c. the study is double-blind, but not single blind.
d. demand characteristics are present in both groups.
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