This app is an adaptation of the "Scale for the Assessment of Thought, Language, and Communication". It was developed by Dr. N.C. Andreasen of the Department of Psychiatry, University of Iowa College of Medicine. It provides a set of definitions for "formal thought disorders". It is used to aid in the assessment of patients who suffer from psychiatric illnesses. For more details, you can read the full paper at: https://doi.org/10.1093/schbul/12.3.473