Cognitive basis of hallucinations in schizophrenia: role of top-down information processing
| Autor: | André Aleman, René S. Kahn, Ron Hijman, Edward H.F. de Haan, Koen B.E. Böcker |
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| Rok vydání: | 2003 |
| Předmět: |
Adult
Male Auditory perception medicine.medical_specialty Speech perception Hallucinations Reality Testing media_common.quotation_subject Audiology Developmental psychology Reference Values Perception medicine Humans Attention Pitch Perception Biological Psychiatry media_common Psychiatric Status Rating Scales Perceptual Distortion Cognition Awareness medicine.disease Reality testing Psychiatry and Mental health Pattern Recognition Visual Schizophrenia Auditory Perception Imagination Speech Perception Female Schizophrenic Psychology Cognition Disorders Attribution Psychology Music Mental image |
| Zdroj: | Schizophrenia Research. 64:175-185 |
| ISSN: | 0920-9964 |
| DOI: | 10.1016/s0920-9964(03)00060-4 |
| Popis: | Hallucinations in schizophrenia have been regarded to result from the erroneous attribution of internally generated information to an external source. Distortions in mental imagery may underlie such confusions. We investigated performance of 77 subjects on multiple behavioral measures of auditory and visual mental imagery and perception, and a measure of reality monitoring. Comparisons were made between performance of schizophrenia patients with (N=22) and without (N=35) hallucinations and matched normal comparison subjects (N=20), after controlling for attentional factors. No differences emerged on any of the mental imagery measures, nor on reality monitoring accuracy. This suggests that there is no stable disposition towards abnormal mental imagery associated with hallucinations. However, for patients with active hallucinations (N=12), hallucination severity correlated positively with a measure of imagery-perception interaction in the auditory modality, r=0.70, p=0.01. Although preliminary, this finding is consistent with recent theoretical proposals in which hallucinations have been suggested to result from an increased influence of top-down sensory expectations on conscious perception. |
| Databáze: | OpenAIRE |
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