Multiple Choice
Placebos are used in experiments to
A) control for the variability of individuals who tend to volunteer for research studies.
B) control for the expectations of some research participants that they will improve just because they are in a research study.
C) help determine whether an independent variable actually causes a statistically significant change in a dependent variable.
D) make certain that the treatment and control group are randomly selected.
Correct Answer:
Verified
Correct Answer:
Verified
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