double blind experiment

dou·ble blind ex·per·i·ment

(dŭb'ĕl blīnd eks-per'i-mĕnt)
An investigation conducted with neither experimenter nor subjects knowing which experiment is the control; prevents bias in recording results.
See also: double-masked experiment
References in periodicals archive ?
Benton and Roberts completed a double blind experiment on sixty children.
We hope and want to believe that randomized, placebo-controlled, double blind experiments eliminate bias and give us a firm basis for evidenced-based medicine, but the experts suggest research can be, and often is, perverted.