experimenter effects


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Related to experimenter effects: counterbalancing

ex·per·i·ment·er ef·fects

the influence of the experimenter's behavior, personality traits, or expectancies on the results of that person's own research. See: double-blind study.

ex·per·i·ment·er ef·fects

(eks-per'i-men'tĕr e-fekts')
The influence of the experimenter's behavior, personality traits, or expectancies on the results of that person's own research.
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There may have been a unique experimenter effect in the individual ("non-market") setting.
Through a better understanding of these experimenter effects, we will be able to make meaningful comparisons of results across studies that have employed different experimenters in differing laboratory contexts.
Experimenter effects and the remote detection of staring.
Nevertheless, although I do not believe that skeptics will inevitably fail to find evidence of psi in any experiment they conduct, it also seems obvious that the experimenter can have an effect upon the beliefs, expectations, and behaviour of the participant in ways that affect the outcome, such that it is rather surprising that commentators are suspicious of experimenter effects. I discussed this in some depth in a recent Minefield article (Roe, 2016b) and found that such effects should be expected given the social dynamic interaction between experimenter and participant that affords an opportunity for all sorts of implicit information to be communicated.
Palmer notes but does not fully develop the substantial likelihood of experimenter effects in the PMIR studies.
On the topic of experimenter effects, and experimenters who get exceptional results, probably few compare to the author of the next chapter: Rupert Sheldrake, a biologist, and a fellow of Clare College, Cambridge.
In addition to his critique of Kanthamani and Broughton (1994) and Willin (1996a), Wiseman (2010a) briefly mentions experimenter effects: "Perhaps the most far-reaching version of this 'get out of a null effect free' card involves an appeal to the 'experimenter effect,' wherein any negative findings are attributed to the psi- inhibitory nature of the parapsychologist running the study" (p.