#experimental_procedure  the specific techniques used in conducting a particular experiment
  supertype:  #procedure.activity__process__proces  a particular course of action intended to achieve a results; "the procedure of obtaining a driver's license"; "it was a process of trial and error"
  subtype:  #double-blind_procedure__double-blind_experiment__double-blind_study  an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment; a double-blind procedure is used to guard against both experimenter bias and placebo effects

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