Why is being double-blinded the best way to prevent bias in an experimental study?
A)Two or more of the study subjects don't even know a study is going on
B)Neither the researcher nor the study subjects know who is in which group, whether experimental or placebo
C)The researchers are aware of who is in which group, but the study subjects are not
D)The results of the study cannot be known to anyone until many years later

Question

Quizplus · Accepted Answer

Being double-blinded is the best way to prevent bias in an experimental study because neither the researcher nor the study subjects know who is in which group, whether experimental or placebo.
By being double-blinded, there is no room for skewed human perception to influence the outcome. Some study subjects may be inclined to report results simply from being aware that they should or should not expect results. "Blinded" researchers won't be looking for any particular outcome in the experimental groups.

Why Is Being Double-Blinded the Best Way to Prevent Bias