An experimenter who decides not to tell participants whether they are receiving a treatment pill or a sugar pill is conducting a double-blind study.

Question

Quizplus · Accepted Answer

This scenario describes a single-blind study because only the participants are unaware of their treatment status. In a double-blind study, both the participants and the experimenters do not know who receives the treatment or the placebo.

An Experimenter Who Decides Not to Tell Participants Whether They