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A longitudinal investigation of the relationship between crowding and reading: a neurodegenerative approach

Yong, K; Rajdev, K; Warrington, E; Nicholas, J; Warren, J; Crutch, S; (2016) A longitudinal investigation of the relationship between crowding and reading: a neurodegenerative approach. Neuropsychologia , 85 pp. 127-136. 10.1016/j.neuropsychologia.2016.02.022. Green open access

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Abstract

We have previously documented two patients (FOL and CLA) with posterior cortical atrophy who achieved accurate and rapid reading despite deficits in ten measures of visual processing, with two notable exceptions: 1) a measure of visual acuity, 2) a measure of visual crowding. Subsequent longitudinal investigation of these patients was carried out, involving annual tests of early visual, visuoperceptual and visuospatial processing and assessment of reading ability. Follow-up assessments identified the evolution of a particular early visual processing deficit, excessive visual crowding; this deficit has been previously implicated in forms of dyslexia. Consistent with the link between crowding and reading dysfunction, follow-up assessments also revealed deterioration in both patients' reading ability. The current findings demonstrate a neurodegenerative approach towards understanding the relationship between visual crowding and the reading system, and suggest possible mechanisms for how excessive crowding may disrupt word recognition.

Type: Article
Title: A longitudinal investigation of the relationship between crowding and reading: a neurodegenerative approach
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neuropsychologia.2016.02.022
Publisher version: http://dx.doi.org/10.1016/j.neuropsychologia.2016....
Additional information: This is an Open Access article published under the terms of a CC BY licence at the above publisher's link location.
Keywords: Alzheimer’s Disease (AD), Posterior Cortical Atrophy (PCA), dyslexia, letter-by-letter reading, visual crowding
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Department of Neuromuscular Diseases
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Neurodegenerative Diseases
URI: https://discovery-pp.ucl.ac.uk/id/eprint/1477583
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