The GESTALT ARCHIVE at http://rdz.acor.org/gestalt!/gerhards/archive.html has web-published Erwin Levy's essential paper on the Gestalt psychological view of thought disorders in schizophrenia: "Some Aspects of the Schizophrenic Formal Disturbance of Thought". This paper was written in 1943 in cooperation with the founder of Gestalt theory, Max Wertheimer (Erwin Levy was one of the assistants of Wertheimer in Frankfurt, had to emigrate to the USA and worked there in various hospitals and in private practice). The article reflects the Gestalt theoretical position that thinking is not an isolated faculty but part of the functioning personality in its relationship to the world. I think it is interesting not only for people working with people diagnosed as psychotic.