Giving placebos in drug experiments is necessary to:
Correct answer: C. control for the effects of suggestion and expectation
- A. counteract the random assignment of subjects
- B. counteract the side effect of the drug
- C. control for the effects of suggestion and expectation
- D. keep control subjects from knowing they have been given the drug
Explanation
A placebo controls for changes caused by participants' expectations and suggestions rather than by the drug's active ingredients. This helps isolate the drug's actual effect.
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