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Placebo effect

The placebo effect, also known as non-specific effects and the subject-expectancy effect, is the phenomenon that a patient's symptoms can be alleviated by an otherwise ineffective treatment, since the individual expects or believes that it will work.

Some people consider this to be a remarkable aspect of human physiology; others consider it to be an illusion arising from the way medical experiments were conducted.

Note: This article excerpts material from the Wikipedia article "Placebo effect", which is released under the GNU Free Documentation License.

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