A substance that has no psychological or physical effect of its own, but appears to have an effect because of the beliefs of the people using it is called a(n) ______.
A) initiative substance
B) confounding factor
C) placebo
D) neuter

Question

Quizplus · Accepted Answer

A placebo is a substance or treatment that has no active ingredient or physiological effect, but can produce a psychological or physical response because the individual believes it will work. It is commonly used in medical studies as a control group for comparison against active treatments, but can also be used in clinical practice as a way to harness the power of the placebo effect for therapeutic benefit. The other answer choices (A) initiative substance, (B) confounding factor, and (D) neuter do not accurately describe the concept of a placebo.

A Substance That Has No Psychological or Physical Effect of Its