Definitions for "Double-blind study"
An intervention study where two or more groups of patients are deliberately given different treatments and neither the patient or the doctor responsible for the treatment is aware of which treatment is being administered.
A scientific study in which neither the subjects nor the researchers know which subjects are taking the drug and which are taking the placebo. This type of study is conducted to ensure objective results.
A trial in which neither the patient nor physician can distinguish between the real thing (for example a pill) and the inactive substance(the dummy pill)