Double-blind procedure refers to a procedure for circumventing the effects of experimenter or participant expectations. In a double-blind study, neither the participant nor the experimenter knows what treatment the participant is receiving until the very end of the study. Double-blind procedure, moreover refers to an investigation where neither subjects nor investigators know who members of experimental and control groups are. Please see Singleblind procedure.)
Lexicon of Psychology - Terms, Treatments, Biographies,