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Global perception in simultanagnosia is not as simple as a game of connect-the-dots |
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| Authors: | Kirsten A. Dalrymple Walter F. Bischof Jason J.S. Barton Alan Kingstone |
| Affiliation: | a Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4 b Department of Medicine (Neurology), University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4 c Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4 d Department of Computing Science, University of Alberta, Edmonton, Alberta, Canada |
| Abstract: | Simultanagnosia is a neuropsychological disorder characterized by a restriction of visuospatial attention. In addition, patients are able to identify local elements of a scene, but not the global whole. This may be due to a failure to scan and assemble local elements into a global whole (i.e. connect-the-dots). We monitored the eye movements of a simultanagnosic patient while she identified local and global elements of hierarchical letters. Scanning each local element was not necessary, nor sufficient, for successful global level identification. Our results argue against a connect-the-dots strategy of global identification and suggest that residual global processing may be occurring. |
| Keywords: | Balint syndrome Simultanagnosia Eye movements Perception Attention |
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