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Centre for Policy on Ageing | |
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| A cognitive neuropsychological approach to the study of delusions in late-onset schizophrenia | | Author(s) | Mary L Phillips, Robert Howard, Anthony S David |
| Journal title | International Journal of Geriatric Psychiatry, vol 12, no 9, September 1997 |
| Pages | pp 892-901 |
| Keywords | Delusion ; Schizophrenia ; Perception disorders ; Assessment procedures for mental patients. |
| Annotation | Hypotheses to explain delusion formation include distorted perceptual processing of meaningful stimuli (e.g. faces), abnormal reasoning, or a combination of both. The study investigated these hypotheses using standardised neuropsychological tests. Three patients with late-onset schizophrenia were compared with 8 age-matched normal control subjects. All subjects were administered standardised neuropsychological tests of facial processing and tests of verbal reasoning. The test scores of the three patients were compared with published normal values and the age-matched control data. The tests demonstrated impaired matching of unfamiliar faces in deluded subjects, particularly in a subject with delusional misidentification. Increasing of emotional content of logical reasoning problems had a significant effect on the deluded subjects' reasoning, but not that of the normal controls. The findings suggest impaired visual processing plus abnormal reasoning in deluded subjects. However, these impairments are relatively subtle, given the severity of psychiatric disorder in the patients studied. (RH). |
| Accession Number | CPA-980827263 A |
| Classmark | EDD: ELK: EE: DA:4C |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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