Double-blind

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Double-blind study

Double-blind (pronunciation: /ˈdʌb(ə)l blʌɪnd/) is a term used in research design, particularly in psychology, medicine, and related fields. It refers to a type of study in which both the participants and the researchers are unaware of which participants receive the treatment or intervention and which do not. This method is used to prevent bias in research results.

Etymology

The term "double-blind" comes from the combination of "double", meaning twice or two, and "blind", referring to the lack of knowledge or awareness. It was first used in the context of medical research in the mid-20th century.

Related Terms

  • Blind experiment: An experiment in which information about the test is kept from the participant until after it is completed. Double-blind studies are a type of blind experiment.
  • Single-blind: A study in which only the participant, and not the experimenter, is unaware of the treatment or intervention being given.
  • Placebo: A substance or treatment which is designed to have no therapeutic value. Placebos are often used in double-blind studies to compare the effects of the actual treatment.
  • Randomized controlled trial: A type of scientific experiment that aims to reduce bias when testing a new treatment. Double-blind studies are often randomized controlled trials.

See Also

External links

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