The Monster Study - 1939

The Monster Study was a stuttering experiment on 22 orphan children in Davenport, Iowa, in 1939 conducted by Wendell Johnson at the University of Iowa.

Johnson chose one of his graduate students, Mary Tudor, to conduct the experiment and he supervised her research.

After placing the children in control and experimental groups, Tudor gave positive speech therapy to half of the children, praising the fluency of their speech, and negative speech…