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The symptoms of Parkinson's disease can vanish briefly in the face of stress or a strong emotion. Now scientists are searching for a treatment based on this phenomenon, a form of the placebo effect.
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Doctor-patient interactions can make a big difference to the effectiveness of treatments. In a new study, even a fake pain treatment helped when doctors believed it was real.
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One athlete's "psych-up" ritual may psych out an opponent. And even treatments that lack hard evidence of benefit, scientists say, might provide a competitive edge if the athletes believe they work.