double-blind

[duhb-uhl-blahynd]

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

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

Word History and Origins

Origin of double-blind¹

First recorded in 1935–40

Example Sentences

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

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

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"Previous research suggesting potential links between calcium supplement use and the risk for dementia was purely observational in nature. Our research, in comparison, consisted of a post-hoc analysis from a 5-year double-blind, placebo controlled randomized clinical trial on calcium supplements to prevent fracture. Whilst our study is still epidemiology, its design does reduce the likelihood of unmeasured confounding"

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But to move from hypothesis to proven treatment, he says, the scientific community urgently needs double-blind, randomized, controlled trials—the gold standard for treatment research—on nicotine therapy for post-acute infection syndromes.

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Just last week, Kennedy told American parents to “do your own research” on vaccines as if the average American mother is capable of running a double-blind study at her kitchen table in her abundant downtime.

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