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Updated: Jun 23, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
Published on: April 11, 2025
Global perception in simultanagnosia is not as simple as a game of connect-the-dots
Kirsten A Dalrymple1, Walter F Bischof, David Cameron
1Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4. kdalrymple@psych.ubc.ca
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.
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