Attribution Bias in schizophrenian patients who have auditory hallucination

Introduction: Concerning cognitivism, psychotic experiences (hallucination) of schizophrenic patiets have been hypothesized to originate from a fundamentally cognitive biases. Methods: To explor the idea that attribution bias may underlin appearance of auditory hallucination, in the current descriptive study, a source-monitoring task were used to compare healthy controles with relatives of individuals with schizophrenia who had experienced current auditory hallucinations and those relatives who had not and individuals with major depression disorders across all of the schizophrenic and major depression patients of four shiraz psychiatry hospital. Results: The data were analyzed with regard to d´, β and attribution bias scores. This scores is accounted based on SDT statistical method. Relative to three other groups, schizophrenian patients who had experienced current auditory hallucination in visual version of source monitoring task had poorer performance in attribution bias scores than, that hasn’t attribute to the β scores and antipsychotic medication. Conclusion: The results has been explained in the light of the fernyhogh’s re-expansion model (2004) and show the deficit in interactional relationship between attribution bias and inner speech.