+"Double blind" is a research design where neither the participants nor the researchers administering the study know who is receiving a particular treatment. This method crucialy prevents [Bias](/wiki/Bias) and ensures objective outcomes, especially when a [Placebo](/wiki/Placebo) is involved.
+## See also
+- [Single Blind](/wiki/Single_Blind)
+- [Clinical Trial](/wiki/Clinical_Trial)
+- [Research Design](/wiki/Research_Design)