An open-label trial, or open trial, is a type of clinical trial in which  both the researchers and participants know which treatment is being administered. This contrasts with single blind and double blind experimental designs, where participants are not aware of what treatment they are receiving (researchers are also unaware in a double blind trial) .
An open-label trial, or open trial, is a type of clinical trial in which information is not withheld from trial participants. In particular, both the researchers and participants know which treatment is being administered. This contrasts with a blinded experiment, where information is withheld to reduce bias .
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information is not withheld from trial participants. In particular,
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single blind and double blind experimental designs, where participants are not aware of what treatment they are receiving (researchers are also unaware in a double blind trial)
a blinded experiment, where information is withheld to reduce bias