A placebo effect can occur when the
A. participant believes they are receiving a beneficial treatment.
B. random sampling procedure has been conducted inaccurately.
C. researcher fails to obtain informed consent from the participants.
D. correlation between two key variables equals zero.
Answer:A
A placebo effect can occur when the
A. participant believes they are receiving a beneficial treatment. B. random sampling procedure has been conducted inaccurately. C. researcher fails to obtain informed consent from the participants. D. correlation between two key variables equals zero.