Physician: In an experiment, 50 patients with chronic back pain were divided into two groups. Small magnets were appl...

Faezeh on November 2, 2020


Can anyone explain why answer choice A is correct, please?

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Emil-Kunkin on June 14, 2023

Hi, the experiment as described has a major flaw: the control group was aware that they were not administered any sort of treatment. This means that the placebo effect might have been a factor. Maybe the magnets had no effect but the patients who were given magnets thought that the magnets helped, and then convinced themselves the magnets did indeed help.