A therapist believes so strongly in her approach that she finds improvement even when none exists. Which type of study design would prevent this problem?

Question

Quizplus · Accepted Answer

Double-masked (or double-blind) studies are designed to prevent bias by ensuring that neither the participants nor the experimenters know who is receiving a particular treatment. This would prevent the therapist from perceiving improvements based on her beliefs about the effectiveness of her approach, as she wouldn't know which participants were receiving her treatment versus a control.

A Therapist Believes So Strongly in Her Approach That She