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Reasoning under uncertainty in deluded schizophrenic patients: a longitudinal study

Published online by Cambridge University Press:  16 April 2020

S.B. Brankovic  and
V.R. Paunovic
S.B. Brankovic
Affiliation:
Institute of Psychiatry, Clinical Center of Serbia, Faculty of Medicine Belgrade, Yugoslavia
V.R. Paunovic
Affiliation:
Institute of Psychiatry, Clinical Center of Serbia, Faculty of Medicine Belgrade, Yugoslavia
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Summary

Several current hypotheses consider the process of attribution of importance to stimuli and the integration of actually perceived reality with experience as a cognitive base for the genesis of delusions. We tested these models by a comparison of deluded schizophrenics, healthy controls, and anxious patients on reasoning under uncertainty. Reasoning under uncertainty was examined in currently deluded schizophrenics (n = 29), in 16 of them also in remission, in normal control groups (n = 35), and in anxious patients (n = 31) using a probabilistic inference task. Acutely psychotic schizophrenics were less ready than normal subjects, anxious patients, and schizophrenics, in remission to modify their judgement in probabilistic situation confronted with potentially disconfirmatory data. They were also less prone than anxious patients and schizophrenics in remission to correct their estimate confronted with confirmatory data. The data support the hypothesis of a weaker influence of incoming stimuli on reasoning under uncertainty as a cognitive base of the maintenance of delusions.

Keywords

delusionslongitudinal studyreasoningschizophrenia
Type
Original article
Information
European Psychiatry , Volume 14 , Issue 2 , April 1999 , pp. 76 - 83
Copyright
Copyright © Elsevier, Paris 1999

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References

American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders, 4th edition. (DSM-IV) Washington, DC: American Psychiatric Press; 1994.Google Scholar
Edwards, WPhillips, LD. Man as transducer for probabilities in Bayesian command and control systems.In: Bryan, LGShelly, WM eds. Human Judgements and Optimality. New York: Wiley; 1964. pp. 360–401.Google Scholar
Evans, JBias in Human Reasoning: Causes and Consequences Hove: Lawrence Erlbaum Associates; 1989. pp. 41–64.Google Scholar
Fischhoff, BBeyth-Marom, R. Hypothesis evaluation from a Bayesian Perspective Psychol Rev 1983 ; 90 : 239–260.CrossRefGoogle Scholar
Garety, PAHemsley, DRWessely, S. Reasoning in deluded schizophrenic and paranoid patients: biases in performance on a probabilistic inference task. J Nerv Ment Dis 1991 ; 179 : 194–201.CrossRefGoogle ScholarPubMed
Gray, JA. The Neuropsychology of Anxiety: an Enquiry into the Function of the Septo-Hippocampal System New York: Oxford University Press; 1982.Google Scholar
Gray, JARawlins, JNPHemsley, DRSmith, AD. The neuropsychology of schizophrenia. Behav Brain Sci 1991 ; 14 : 1–84.CrossRefGoogle Scholar
Hemsley, DRAn experimental psychological model for schizophrenia.In: Hafner, HGattaz, WFJanzarik, WSearch for the Causes of Schizophrenia Berlin/Heidelberg/New York: Springer; 1987. pp. 179–188.CrossRefGoogle Scholar
Hemsley, DR. Cognitive disturbance as the link between schizophrenic symptoms and their biological bases. Neurol Psychiatry Brain Res 1994 ; 2 : 163–170.Google Scholar
Hemsley, DRGarety, PA. The formation and maintenance of delusions: a Bayesian analysis. Br J Psychiatry 1986 ; 149 : 51–56.CrossRefGoogle ScholarPubMed
Huq, SFGarety, PAHemsley, DR. Probabilistic judgements in deluded and non-deluded subjects. Q J Exp Psychol 1988 ; 40A : 801–812.CrossRefGoogle Scholar
Jaspers, KGeneral Psychopathology (trans. Hoenig J, Hamilton MW, 1963) Manchester: Manchester University Press; 1959.Google Scholar
Maher, BA. Anomalous experience and delusional thinking: the logic of explanations.In: Oltmans, TFMaher, BADelusional Beliefs New York: Wiley; 1988. pp. 1533.Google Scholar
McKenna, PJ. Pathology, phenomenology and the dopamine hypothesis of schizophrenia. Br J Psychiatry 1987 ; 151 : 288–301.CrossRefGoogle ScholarPubMed
McKenna, PJ. Memory, knowledge and delusions. Br J Psychiatry 1991 ; 159 Suppl 14 : 36–41.CrossRefGoogle Scholar
Overall, JEGorham, DR. The Brief Psychiatric Rating Scale. Psychol Rep 1962 ; 10 : 799–812.CrossRefGoogle Scholar
Phillips, LDEdwards, W. Conservatism in a simple probability task. J Exp Psychol 1966 ; 72 : 346–354.CrossRefGoogle Scholar
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