Institutions in 48 states housing persons legally defined as "criminally insane" were sent questionnaires; 89% were returned. The ratio of patients per psychologists varies greatly—from 5 to 2000 per psychologist. "41% of the psychologists are full-time, while 56% of the units have only part-time psychologists." Major activity of psychologists is psychodiagnosis and secondarily psychotherapy. Medical administrations "have strongly favorable attitudes toward psychologists performing psychotherapy and… as a whole psychologists working with the 'criminally insane' are fairly well satisfied in their relations with their administration." (PsycINFO Database Record (c) 2010 APA, all rights reserved)