[The Monster Study](https://en.m.wikipedia.org/wiki/Monster_Study) TLDR The Monster Study was a stuttering experiment performed on 22 orphan children. Patricia Zebrowski, University of Iowa assistant professor of speech pathology and audiology notes that the data that resulted from the experiment is the "largest collection of scientific information" on the phenomenon of stuttering and that Johnson's work was the first to discuss the importance of the stutterer's thoughts, attitudes, beliefs, and feelings and continues to influence views on stuttering greatly.