Glossary Definition
double-blind experiment
An experiment designed such that neither the participants nor the researchers observing them know which participants are in the experimental and control groups until after the observations are complete. Double-blind experiments are particularly important in the field of medicine because they control for both the placebo effect and unconscious bias on the part of the researchers — two factors that can make the results of a medical study difficult to interpret. To learn more, visit our side trip Fair tests in the field of medicine.

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