Is the perception of illusions abnormal in schizophrenia?
| Autor: | Michael H. Herzog, Albulena Shaqiri, Maya Roinishvili, Lukasz Grzeczkowski, Fred W. Mast, Eka Chkonia, Andreas Brand |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male medicine.medical_specialty Visual perception genetic structures media_common.quotation_subject Illusion Context (language use) Audiology 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Perception medicine Humans 0501 psychology and cognitive sciences Biological Psychiatry media_common Optical illusion 05 social sciences medicine.disease Illusions Visual Hallucination Psychiatry and Mental health Schizophrenia Case-Control Studies Visual Perception Female Schizophrenic Psychology Psychology 030217 neurology & neurosurgery Mental image |
| Zdroj: | Psychiatry Research. 270:929-939 |
| ISSN: | 0165-1781 |
| DOI: | 10.1016/j.psychres.2018.10.063 |
| Popis: | There seems to be no common factor for visual perception, i.e., performance in visual tasks correlates only weakly with each other. Similar results were found with visual illusions. One may expect common visual factors for individuals suffering from pathologies that alter brain functioning, such as schizophrenia. For example, patients who are more severely affected by the disease, e.g., stronger positive symptoms, may show increased illusion magnitudes. Here, in the first experiment, we used a battery of seven visual illusions and a mental imagery questionnaire. Illusion magnitudes for the seven illusions did not differ significantly between the patients and controls. In addition, correlations between the different illusions and mental imagery were low. In the second experiment, we tested 59 patients (mostly outpatients) with ten visual illusions. As for the first experiment, patients and controls showed similar susceptibility to all but one visual illusion. Moreover, there were no significant correlations between different illusions, symptoms, or medication type. Thus, it seems that perception of visual illusions is mostly intact in schizophrenia. |
| Databáze: | OpenAIRE |
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