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experimenter effect

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noun
psychol the influence of an experimenter's expectations on his results
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Medical definitions for experimenter effect

experimenter effect

n.
The influence of the experimenter's behavior, personality traits, or expectancies on the results of his or her own research.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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