Brebion, Gildas; Amador, Xavier; David, Anthony; Malaspina, Dolores; and others.
Positive symptomatology and source-monitoring failure in schizophrenia--
An analysis of symptom-specific effects.
Psychiatry Research 95 .2 ( Aug 2000): 119-131

Abstract

Investigated the association between self-monitoring/reality-monitoring deficits and positive symptoms hallucinations, delusions and thought disorganization. 40 schizophrenic patients (mean age 34.1 yrs) and 40 controls were administered a source-monitoring task. 24 items were produced, either verbally by the E or verbally by the Subject, or presented as pictures. Subjects were read a recognition list including the produced target items mixed with distractors. They were required to recognize the target items and to remember their source of production. False recognition of distractors and errors in the source attribution of the recognized target items were analyzed. Results showed that higher hallucination scores were associated with an increased tendency toward false recognition of nonproduced items. Hallucinators were more prone to misattribute to another source the items they had produced themselves. Hallucinators and delusional patients were more prone than the other patients to report that spoken items had been presented as pictures. This latter finding suggests that both hallucinations and delusions are associated with confusion between imagined and perceived pictures. Thought disorganization appeared to be independent from self-monitoring/reality monitoring symptomatology.

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