triple blind

Adjective

triple-blind (not comparable)

1. Describing an experiment (usually medical) in which some information which might influence the experiment is withheld from three different parties until the outcome of the experiment is known: most commonly, the three parties are the subjects, the administrators, and the statisticians analysing the data.
   • Triple-blind (i.e., triple-masking) studies are randomized experiments in which the treatment or intervention is unknown to (a) the research participant, (b) the individual(s) who administer the treatment or intervention, and (c) the individual(s) who assess the outcomes.2010, Neil J. Salkind, editor, Encyclopedia of Research Design, SAGE Publications, →ISBN, page 1541