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Definition of Double-blinded study

Double-blinded study: A medical study in which both the subjects participating and the researchers are uaware of when the experimental medication or procedure has been given. Double-blinded studies are often used when initial studies shows particular promise.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=11177
Last Editorial Review: 3/19/2012

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