Double-blind study
Double-blind study
A Double-blind study (pronunciation: /ˈdʌb(ə)l blaɪnd ˈstʌdi/) is a type of experimental design used in scientific research, particularly in the field of medicine and psychology.
Etymology
The term "double-blind" refers to the practice of keeping both the researcher and the participant unaware of the experimental condition to which the participant has been assigned. This is done to prevent bias from influencing the results of the study. The term is believed to have originated in the mid-20th century, although its exact origins are unclear.
Definition
In a double-blind study, neither the participants nor the experimenters know who is receiving a particular treatment. This procedure is utilized to prevent bias in research results. Double-blind studies are particularly useful for preventing bias due to demand characteristics or the placebo effect.
Related Terms
- Single-blind study: A study in which only the participant, and not the experimenter, is unaware of the experimental condition to which they have been assigned.
- Triple-blind study: A study in which the participant, experimenter, and the individual analyzing the data are all unaware of the experimental condition to which participants have been assigned.
- Placebo effect: A phenomenon in which a participant's symptoms can improve after receiving a placebo or fake treatment.
- Bias: A systematic error in data collection or analysis that can lead to incorrect conclusions.
See Also
External links
- Medical encyclopedia article on Double-blind study
- Wikipedia's article - Double-blind study
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