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Titolo:
The signal detection ability of patients with auditory hallucination: Analysis using the continuous performance test
Autore:
Ishigaki, T; Tanno, Y;
Indirizzi:
Univ Tokyo, Grad Sch Arts & Sci, Dept Life Sci Psychol, Meguro Ku, Tokyo 1530041, Japan Univ Tokyo Tokyo Japan 1530041 Psychol, Meguro Ku, Tokyo 1530041, Japan Tanzawa Hosp, Psychiat Serv, Kanagawa, Japan Tanzawa Hosp Kanagawa Japan anzawa Hosp, Psychiat Serv, Kanagawa, Japan
Titolo Testata:
PSYCHIATRY AND CLINICAL NEUROSCIENCES
fascicolo: 4, volume: 53, anno: 1999,
pagine: 471 - 476
SICI:
1323-1316(199908)53:4<471:TSDAOP>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
REALITY;
Keywords:
auditory hallucination; bizarre delusion; continuous performance test; signal detection theory;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Ishigaki, T Univ Tokyo, Grad Sch Arts & Sci, Dept Life Sci Psychol, MeguroKu, 3-8-1 Komaba, Tokyo 1530041, Japan Univ Tokyo 3-8-1 Komaba Tokyo Japan 1530041 yo 1530041, Japan
Citazione:
T. Ishigaki e Y. Tanno, "The signal detection ability of patients with auditory hallucination: Analysis using the continuous performance test", PSY CLIN N, 53(4), 1999, pp. 471-476

Abstract

Signal detection theory is appropriate for analyzing the problem of whether auditory hallucination arises from a sensory or judgmental disorder. In the present study the sensory discrimination ability and decision bias of psychiatric patients with auditory hallucination was investigated by using the visual continuous performance test. Based on signal detection theory the d' (d prime) and the Inp value (the natural logarithm of the beta value) were calculated. The d' is indicator of discriminating ability, whereas the ln beta value is an indicator of decision bias. The psychiatric inpatients with the diagnosis of schizophrenia mainly were divided into 11 patients with auditory hallucinations (AH(+)) and 11 patients without hallucinations (AH(-)). As compared with the AH(-) group, the AH(+) group showed the same d'value and a significantly lower ln beta value. As compared with the normalcontrol group, the AH(+) group showed a significantly lower d' value and anearly normal Inp value. These results suggest that auditory hallucinationis characterized by a cognitive deficit of unreasonably maintaining a relatively risk-taking decision bias in spite of decreased discriminating ability, which opposes the interpretation of Bentall and Slade (1985). The AH(+)group was divided into subgroups with bizarre delusions (BD(+)) and without bizarre delusions (BD(-)). The BD(+) group showed a stronger tendency toward a lower d' value and normal In beta value, which the AH(+) group had.

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Documento generato il 10/07/20 alle ore 18:10:35