Feigned psychosis--a review of the simulation of mental illness.

The literature on the simulation of psychosis is reviewed and six patients who were thought to be feigning a schizophrenic psychosis were studied. On follow-up, all but one of the patients became overtly schizophrenic. It is argued that the simulation of schizophrenia is a prodromal phase of the psychosis occurring in extremely deviant premorbid personalities.