In a blind or blinded experiment, information which may influence the participants of the experiment is withheld until after the experiment is complete.

What does it mean if a trial is double-blind?

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.

How does a double-blind trial work?

A double blind trial is a trial where neither the researchers nor the patients know what they are getting. The computer gives each patient a code number. And the code numbers are then allocated to the treatment groups. Your treatment arrives with your code number on it.