A double-blind study is one in which 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.

What is a double blinded research study?

Listen to pronunciation. (DUH-bul-blind STUH-dee) A type of clinical trial in which neither the participants nor the researcher knows which treatment or intervention participants are receiving until the clinical trial is over. This makes results of the study less likely to be biased.

What is the difference between a blind study and a double-blind study?

In a single blind study, the participants in the clinical trial do not know if they are receiving the placebo or the real treatment. ... In a double-blind study, both the participants and the experimenters do not know which group got the placebo and which got the experimental treatment.