Definition
A placebo effect occurs when a treatment or medication with no therapeutic value (a placebo) is administered to a patient and the patient's symptoms improve. The patient believes and expects that the treatment is going to work, therefore it does. The placebo effect is also a factor to some degree in clinically effective therapies, and explains why patients respond better than others to treatment despite similar symptoms and illnesses.
Origins
The word placebo is from the Latin "I shall please." Throughout most of...
Source: Encyclopedia of Alternative Medicine, ©2006 Gale Cengage. All Rights Reserved. Full copyright.
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