double-blind
Say it: DUH-bul-BLIND /ˌdʌb(ə)lˈblaɪnd/ · adjective
What “double-blind” means
Neither participants nor assessing researchers know who gets which treatment.
More precisely: Describing a trial where neither participants nor researchers know who gets the real treatment.
Example: “Only a double-blind study can show whether the supplement really beats a placebo.”
When to use it
In research discussions, to describe trials that hide treatment assignments from both participants and the researchers assessing them.
Similar words
blinded, controlled
Quick check
During a trial, volunteers and the researchers assessing them cannot tell who received the medicine or the inactive substitute. The trial is…
double-blind or single-blind?
Show the answer
double-blind
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