A _______ study minimizes the chances that the results are due to a placebo effect or to bias on the part of the researcher.
A) controlled and valid
B) randomized and epidemiological
C) valid and randomized
D) epidemiological
E) controlled and randomized

Question

Quizplus · Accepted Answer

A controlled study involves a group of participants who receive the treatment being studied and a control group who receives a placebo or a standard treatment. Randomization helps to reduce bias by randomly assigning participants to either the treatment or control group. Therefore, a controlled and randomized study minimizes the chances of a placebo effect or bias on the part of the researcher.

A _______ Study Minimizes the Chances That the Results Are