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|History=Barseghyan's formulation of the third law was the first attempt to address the problem of method employment in the scientonomic context.
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A final change in method occurred when ''experimenter's bias'' was discovered:
<blockquote>The researchers that are in contact with patients can give patients conscious or unconscious hints as to which group is which. It is possible that the positive effect of the drug established in a blind trial was due to the fact that the patients in the placebo group knew that they were given a placebo. The method of drug testing was modified yet again to reflect this newly discovered phenomenon. The contemporary approach is to perform a double-blind trial where neither patients nor researchers know which group is which.[[CiteRef::Barseghyan (2015)|pp. 135-6]]</blockquote>
 
{{PrintDiagramFile|diagram file=Double Blind Trial Deduction (Barseghyan-2015-139).png}}
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