Note: * Precertification of denosumab (Prolia and Xgeva) is required of all Aetna participating providers and members in applicable plan designs. For precertification of denosumab (Prolia and Xgeva), call (866) 503-0857, or fax (866) 267-3277.
(psychol) the influence of an experimenter's expectations on his results. experimenter effect in Medicine. experimenter effect n. The influence of the experimenter's behavior, personality traits, or expectancies on the results of his or her own research.
Experimenter's bias is the phenomenon in experimental science by which the outcome of an experiment tends to be biased towards a result expected by the human experimenter.The inability of a human being to remain completely objective is the ultimate source of this bias.n principle, if a measurement has a resolution of, then if the experimenter averages independent measurements the average will have a resolution of (this is the central limit theorem of statistics). This is an important experimental technique used to reduce the impact of randomness on an experiment's outcome.