An important reason for the use of randomization in designing experiments is that it tends to
A) reduce confounding.
B) allow double-blinding.
C) eliminate response error.
D) reduce the placebo effect.

Question

Quizplus · Accepted Answer

Randomization helps to reduce confounding, which is when a factor other than the treatment being studied affects the outcome. By randomly assigning participants to treatment groups, the groups are likely to be similar in all aspects, including confounding factors, except for the treatment being studied, making it easier to determine the true effect of the treatment. Randomization does not necessarily affect double-blinding, response error, or the placebo effect.

An Important Reason for the Use of Randomization in Designing