Dr. Hyper treated 20 patients using a new therapeutic procedure. An outside observer rated the children's activity level on a laboratory task before and after the treatment; 80% of the children decreased their activity level following treatment, and Dr. Hyper concluded that the procedure was highly effective. What is the major problem with Dr. Hyper's experiment?
A)Lack of control group
B)Not double-blind
C)No baseline measure
D)The observer was biased

Question

Quizplus · Accepted Answer

The major problem with Dr. Hyper's experiment is the lack of a control group. Without a comparison group, it is impossible to know whether the decrease in activity level was due to the new therapeutic procedure or other factors. A control group would have received no treatment or a different treatment, allowing for a comparison of the effectiveness of the new procedure.

Dr Hyper Treated 20 Patients Using a New Therapeutic Procedure