Lancaster EPrints

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

[img]
Preview
PDF (1.pdf)
Download (199Kb) | Preview

    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: 30 Sep 2013 15:19
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/10982

    Actions (login required)

    View Item