"double blind"@en-us . . "a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed; designed to reduce or eliminate bias in the results"@en-us . "100744633"@en-us . . . . "0"^^ . "00793844-n"^^ . . . . . "double blind"^^ . . "100793844"^^ . "0"^^ .