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double-blind procedure-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.ouble-blind procedure-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.
The double blind procedure is part of the scientific method that is used to prevent research outcomes from being 'influenced' by the placebo effect or observer bias. Double blinded research is used in many fields of research, including medicine, psychology, social sciences and forensic research.ontrols, double blind procedure, and randomized testing are used to reduce error, self-deception and bias. Control groups are used in controlled experiments to curb bias.