Professor Wakelin has developed a new form of therapy that he believes cures anxiety. Of the people who go through his program, 63% improve. A problem with his research study is:

Question

Quizplus · Accepted Answer

The problem with Professor Wakelin's research study is that it lacks a control condition, meaning there's no way of determining whether the therapy was the cause of the improvement or if it was due to other factors. Without a control group, it's impossible to know if the therapy was truly effective.

Professor Wakelin Has Developed a New Form of Therapy That