from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Describing an experiment (usually medical) in which the identity of those conducting the test(s) is kept secret from both the subjects and the administrators until the outcome of the experiment is known.


Sorry, no etymologies found.


  • Experimenters often use what is called a double-blind procedure to assure the validity of their data.


  • If neither the women participating in the study nor the health professionals working with them know which group each woman is in, the study is called double-blind.

    Our Bodies, Ourselves: Menopause

  • The mistake rate, however, fell to 12 per cent in the so-called "double-blind sequential" line-ups.

    The Independent - Frontpage RSS Feed

  • Complicating the issue is the fact that many believe a gold-standard study would be unethical: How could you carry out what’s called a double-blind study of a large group of children—randomly assigning half to be immunized and half not, leaving the second group of kids vulnerable to serious and often deadly diseases?

    You Raising Your Child

  • It was a double-blind mall intercept with a total of 440 interviews using open - and closed-ended questions, including “Did the commercial say, show, or imply anything about any unique feature of the advertised dryer?”

    Archive 2009-10-01

  • For in this country, it is unlikely that the popular obsession with empirical, double-blind, better living through chemistry, underwriters laboratory tested, government inspected, grade "A" ways of embracing reality will be fading away anytime soon.

    Vaishali: The Voodoos and Don'ts of American Culture

  • Although several open-label trials on gene therapy have shown promise in treating neurologic disease, the researchers noted that this is the first of its type to be confirmed in a follow-up randomized double-blind trial, a study in which neither the investigators nor the patients knew which patients were receiving the real or sham treatment.

    Gene therapy may help reverse Parkinson's symptoms

  • In a randomized, double-blind controlled study of 297 patients at 30 sites, those treated with the Alair device had a 32% reduction in asthma attacks, an 84% reduction in emergency-room visits and a 66% reduction in school or work days lost due to asthma.

    New Surgery to Treat Asthma

  • Homeopathic individualized Q-potencies versus fluoxetine for moderate to severe depression: double-blind, randomized non-inferiority trial.

    Dana Ullman: Homeopathy: A Healthier Way to Treat Depression?

  • This study included 91 outpatients with moderate to severe depression who received an individually chosen homeopathic medicine or fluoxetine (Prozac) 20 mg/day (up to 40 mg/day) in a prospective, randomized, double-blind double-dummy eight week trial.

    Dana Ullman: Homeopathy: A Healthier Way to Treat Depression?


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