Reasoning in Deluded Schizophrenic and Paranoid Patients: Biases in Performance on a Probabilistic Inference Task

作者: P A GARETY , D R HEMSLEY , S WESSELY

DOI: 10.1097/00005053-199104000-00003

关键词: ParanoiaJumping to conclusionsDelusional disorderDevelopmental psychologyPsychologySchizophreniaDelusionCognitive psychologyDiagnosis of schizophreniaParanoid DisordersInference

摘要: An experiment is described in which deluded subjects with a diagnosis of schizophrenia or delusional disorder (paranoia) were compared nondeluded psychiatric control group and normal on probabilistic inference task. Factors relevant to belief formation maintenance investigated. Deluded requested less information before reaching decision more ready change their estimates the likelihood an event when confronted potentially disconfirmatory information. No differences found between two diagnostic groups subjects. The results are discussed light prevailing theories importance abnormal experience rather than reasoning biases beliefs. It suggested that abnormality involved, may coexist perceptual abnormalities.

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