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A research team is studying the effectiveness of a new herbal supplement designed to enhance concentration. One group of participants receives the actual supplement, while a second group receives a pill that looks identical but contains only an inert substance. After one week, both groups show a significant improvement in their ability to concentrate on a difficult task. Which psychological principle best explains the improvement observed in the group that received the inert pill?
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Example of the Placebo Effect in a Drug Trial
A research team is studying the effectiveness of a new herbal supplement designed to enhance concentration. One group of participants receives the actual supplement, while a second group receives a pill that looks identical but contains only an inert substance. After one week, both groups show a significant improvement in their ability to concentrate on a difficult task. Which psychological principle best explains the improvement observed in the group that received the inert pill?
Double-Blind Study
Which of the following statements best defines the placebo effect in the context of psychological research?