Kaplan Nursing Practice Questions - Kaplan Nursing School Admissions Test Exam

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Read the passage and answer the question. The placebo effect — improvement in a patient's condition following a treatment with no active ingredient — is one of medicine's most studied phenomena. Researchers believe expectation, conditioning, and the patient-provider relationship all contribute. Modern clinical trials use placebo controls precisely because subjective improvements occur even when no drug is administered, making it essential to distinguish a medication's true biological effect from background expectations. What is the author's primary purpose in this passage?
Correct Answer:
To explain why clinical trials use placebo controls.

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