Dr.Leblanc is conducting a clinical drug trial.She wants to reduce bias as much as possible,so she has her assistant label the different drug doses as A,B,or C.Neither Dr.Leblanc or her patients know which dose of the drug the patients are receiving.This experimental design is known as a _________ study.
A)single-blind
B)placebo
C)peer-reviewed
D)double-blind

Question

Quizplus · Accepted Answer

This is a double-blind study because both the researcher (Dr. Leblanc) and the patients are unaware of which drug dose the patients are receiving. The use of random assignment and blinding helps to reduce bias and increase the validity of the study. A placebo study involves giving patients a substance that has no active ingredients and comparing it to the treatment group. A peer-reviewed study is a process for evaluating the quality and validity of research by other experts in the field. A single-blind study involves only the patients being unaware of the treatment group they are in, while the researchers are aware.

DrLeblanc Is Conducting a Clinical Drug Trial