Question

A ______ is generally a fake medicine used to disguise the treatments of participants in an experiment.

Answer 1

I believe the answer is: Placebo

In research, placebo refers to the form of drug that would not give any effect to the subjects of the research. But, the research would make the subjects believe that they are taking the real drug while receiving placebo. Placebo could make the patient experiencing improvement simply because he/she believing that they taking the real drugs.