This research paper described how 36 people who had a fear of public speaking were divided into two groups to test the effectiveness of a fear elimination procedure called The Lefkoe Method.
One group was exposed to The Lefkoe Method.
The other group went to Toastmasters meetings.
After a few hours of exposure to The Lefkoe Method the first group spoke in public and each member of that group reported that their fear had literally disappeared. The second group spoke in public at the same time and, of course, they had the same level of fear they had before. However, researchers wanted to be totally sure that The Lefkoe Method produced the results they were witnessing.