Attention, competition, and the parietal lobes: insights from Balint’s syndrome
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- Jackson, G.M., Swainson, R., Mort, D. et al. Psychological Research (2009) 73: 263. doi:10.1007/s00426-008-0210-2
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Simultanagnosia (resulting from occipito-parietal damage) is a profound visual deficit, which impairs the ability to perceive multiple items in a visual display, while preserving the ability to recognise single objects. Here we demonstrate in a patient presenting with Balint’s syndrome that this deficit may result from an extreme form of competition between objects which makes it difficult for attention to be disengaged from an object once it has been selected.