The placebo effect and the influence of participant expectation 1 on hearing aid trials
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The placebo effect and the influence of participant expectation on hearing aid trials.
OBJECTIVE The aim of the study was to investigate the influence of participant expectation on the outcome of a trial that compared two behind-the-ear hearing aids with identical electroacoustic performance, except that one was called a "new" hearing aid and the other a "conventional" hearing aid. DESIGN Twenty experienced adult hearing aid users were told that they were taking part in a trial...
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