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Hemispheric dissociation and dyslexia in a computational model of reading

Monaghan, Padraic and Shillcock, Richard C. (2008) Hemispheric dissociation and dyslexia in a computational model of reading. Brain and Language, 107 (3). pp. 185-193. ISSN 1090-2155

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Abstract

There are several causal explanations for dyslexia, drawing on distinctions between dyslexics and control groups at genetic, biological, or cognitive levels of description. However, few theories explicitly bridge these different levels of description. In this paper we review a long-standing theory that some dyslexics’ reading impairments are due to impairments in hemispheric transfer. We test this theory in a computational model of reading, implementing anatomical features of the visual system. We demonstrate that, when callosal transfer is impaired, the model reads nonwords as well as an unimpaired model, but reads exception words poorly: a pattern of behaviour similar to surface dyslexia. This computational modelling provides a causal link between brain-based theories of dyslexia to cognitive-level theories that refer specifically to phonological impairments within the reading system.

Item Type: Article
Journal or Publication Title: Brain and Language
Uncontrolled Keywords: Hemispheric processing ; Dyslexia ; Computational modelling ; Levels of description ; VISUAL WORD RECOGNITION ; PLANUM TEMPORALE ASYMMETRY ; DEVELOPMENTAL DYSLEXIA ; CEREBRAL ASYMMETRY ; CALLOSAL AGENESIS ; CORPUS-CALLOSUM ; SIMPLE TASKS ; DISABILITY ; LANGUAGE ; CHILDREN
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Departments: Faculty of Science and Technology > Psychology
ID Code: 10982
Deposited By: Prof Padraic Monaghan
Deposited On: 29 Jul 2008 11:51
Refereed?: Yes
Published?: Published
Last Modified: 04 Dec 2016 01:09
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/10982

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