Glossary D
Glossary D
Double-blind experiment is defined as an experimental procedure in which neither the researcher nor the patient knows whether the patient received the real treatment or the placebo until pre-coded records indicating which patient received which are consulted. It is designed to reduce the possibility that expectations for success will increase evidence for success. Moreover, Double-blind experiment is a study in which both the researchers and the participants are unaware of which experimental condition the participants are in, in order to prevent demand effects
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.)