View in EDS

Specific attentional impairments and complex visual hallucinations in eye disease.

Saved in:
Bibliographic Details
Title: Specific attentional impairments and complex visual hallucinations in eye disease.
Authors: Graham, G, Dean, J, Mosimann, UP, Colbourn, C, Dudley, R, Clarke, M, Collerton, D
Source: International Journal of Geriatric Psychiatry. Mar2011, Vol. 26 Issue 3, p263-267. 5p. 1 Chart.
Subjects: Attention, Cognition disorders, Eye diseases, Hallucinations, Sensory perception, Statistical sampling, T-test (Statistics), U-statistics, Logistic regression analysis
Abstract: Objective: To test the prediction by the Perception and Attention Deficit (PAD) model of complex visual hallucinations that cognitive impairment, specifically in visual attention, is a key risk factor for complex hallucinations in eye disease. Methods: Two studies of elderly patients with acquired eye disease investigated the relationship between complex visual hallucinations (CVH) and impairments in general cognition and verbal attention (Study 1) and between CVH, selective visual attention and visual object perception (Study 2). The North East Visual Hallucinations Inventory was used to classify CVH. Results: In Study 1, there was no relationship between CVH (n¼10/39) and performance on cognitive screening or verbal attention tasks. In Study 2, participants with CVH (n¼11/31) showed poorer performance on a modified Stroop task ( p<0.05), a novel imagery-based attentional task ( p<0.05) and picture ( p<0.05) but not silhouette naming ( p¼0.13) tasks. Performance on these tasks correctly classified 83% of the participants as hallucinators or non-hallucinators. Conclusions: The results suggest that, consistent with the PAD model, complex visual hallucinations in people with acquired eye disease are associated with visual attention impairment. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Geriatric Psychiatry is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
Description
Abstract:Objective: To test the prediction by the Perception and Attention Deficit (PAD) model of complex visual hallucinations that cognitive impairment, specifically in visual attention, is a key risk factor for complex hallucinations in eye disease. Methods: Two studies of elderly patients with acquired eye disease investigated the relationship between complex visual hallucinations (CVH) and impairments in general cognition and verbal attention (Study 1) and between CVH, selective visual attention and visual object perception (Study 2). The North East Visual Hallucinations Inventory was used to classify CVH. Results: In Study 1, there was no relationship between CVH (n¼10/39) and performance on cognitive screening or verbal attention tasks. In Study 2, participants with CVH (n¼11/31) showed poorer performance on a modified Stroop task ( p<0.05), a novel imagery-based attentional task ( p<0.05) and picture ( p<0.05) but not silhouette naming ( p¼0.13) tasks. Performance on these tasks correctly classified 83% of the participants as hallucinators or non-hallucinators. Conclusions: The results suggest that, consistent with the PAD model, complex visual hallucinations in people with acquired eye disease are associated with visual attention impairment. [ABSTRACT FROM AUTHOR]
ISSN:08856230
DOI:10.1002/gps.2522