To study the effects of Healing Touch; what is the best choice to minimize confounding variables?
A) Offer a small payment for participants' time.
B) Offer all participants a Healing Touch session when data collection is completed.
C) Offer to enroll only individuals who do not have any medical conditions.
D) Offer another activity that gives similar time and attention to control group participants.
D
Feedback:
The best way to minimize confounding variables is to offer another activity that gives similar time and attention to control group participants—known as a placebo. Otherwise, the participant's knowledge of not receiving a treatment may affect the study's results. None of the other answers would control for this potential confounding variable.
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