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double-blind

American  
[duhb-uhl-blahynd] / ˈdʌb əlˈblaɪnd /

adjective

  1. of or relating to an experiment or clinical trial in which neither the subjects nor the researchers know which subjects are receiving the active medication, treatment, etc., and which are not: a technique for eliminating subjective bias from the test results.


double-blind British  

adjective

  1. of or relating to an experiment to discover reactions to certain commodities, drugs, etc, in which neither the experimenters nor the subjects know the particulars of the test items during the experiments Compare single-blind

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of double-blind

First recorded in 1935–40

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The study is double-blind, meaning neither the patients nor the researchers know which treatment each participant receives until the trial ends.

From Science Daily

The researchers conducted a randomized, double-blind, placebo-controlled clinical trial involving 28 outpatients diagnosed with MDD at the Fourth People's Hospital of Taizhou.

From Science Daily

Double-blind means neither the patients nor the researchers knew who received which treatment, helping reduce bias.

From Science Daily

In the experiment, forty-seven healthy adults participated in a double-blind randomized crossover trial.

From Science Daily

The trial was double-blind, meaning neither the patients nor their doctors knew who received the active treatment.

From Science Daily