The purpose of a double-blind design in clinical trials is to reduce error that results from:
A) the way in which the outcome is assessed.
B) subjects' knowledge of their assignment to study conditions.
C) nonrandom assignment to study conditions.
D) the way in which the outcome is assessed and subjects' knowledge of their assignment to study conditions.
E) All are correct.

Question

Quizplus · Accepted Answer

A double-blind design is a clinical trial design in which neither the participants nor the researchers know which treatment is being administered. This helps to reduce bias that could result from the way in which the outcome is assessed or from the subjects' knowledge of their assignment to study conditions.

The Purpose of a Double-Blind Design in Clinical Trials Is