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Atypical viewing position effect in developmental dyslexia: A behavioural and modelling investigation.

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Title: Atypical viewing position effect in developmental dyslexia: A behavioural and modelling investigation.
Authors: Valdois, Sylviane (AUTHOR), Phénix, Thierry (AUTHOR), Fort, Mathilde (AUTHOR), Diard, Julien (AUTHOR)
Source: Cognitive Neuropsychology. Jul2021, Vol. 38 Issue 5, p319-335. 17p.
Subjects: Dyslexia, Word recognition, Visual fields, Attention span, People with dyslexia
Abstract: The probability of recognizing a word depends on the position of fixation during processing. In typical readers, the resulting word-recognition curves are asymmetrical, showing a left-of-centre optimal viewing position (OVP). First, we report behavioural results from dyslexic participants who show atypical word-recognition curves characterized by the OVP being right of centre with recognition probability being higher on the rightmost than on the leftmost letters. Second, we used BRAID, a Bayesian model of word recognition that implements gaze position, an acuity gradient, lateral interference and a visual attention component, to examine how variations in the deployment of visual attention would affect the OVP curves. We show that the atypical dyslexic curves are well simulated assuming a narrow distribution of visual attention and a shifting of visual attention towards the left visual field. These behavioural and modelling findings are discussed in light of current theories of visual attention deficits in developmental dyslexia. [ABSTRACT FROM AUTHOR]
Copyright of Cognitive Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Label: Title
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  Data: Atypical viewing position effect in developmental dyslexia: A behavioural and modelling investigation.
– Name: Author
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  Data: <searchLink fieldCode="AR" term="%22Valdois%2C+Sylviane%22">Valdois, Sylviane</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Phénix%2C+Thierry%22">Phénix, Thierry</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fort%2C+Mathilde%22">Fort, Mathilde</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Diard%2C+Julien%22">Diard, Julien</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Cognitive+Neuropsychology%22">Cognitive Neuropsychology</searchLink>. Jul2021, Vol. 38 Issue 5, p319-335. 17p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Dyslexia%22">Dyslexia</searchLink><br /><searchLink fieldCode="DE" term="%22Word+recognition%22">Word recognition</searchLink><br /><searchLink fieldCode="DE" term="%22Visual+fields%22">Visual fields</searchLink><br /><searchLink fieldCode="DE" term="%22Attention+span%22">Attention span</searchLink><br /><searchLink fieldCode="DE" term="%22People+with+dyslexia%22">People with dyslexia</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The probability of recognizing a word depends on the position of fixation during processing. In typical readers, the resulting word-recognition curves are asymmetrical, showing a left-of-centre optimal viewing position (OVP). First, we report behavioural results from dyslexic participants who show atypical word-recognition curves characterized by the OVP being right of centre with recognition probability being higher on the rightmost than on the leftmost letters. Second, we used BRAID, a Bayesian model of word recognition that implements gaze position, an acuity gradient, lateral interference and a visual attention component, to examine how variations in the deployment of visual attention would affect the OVP curves. We show that the atypical dyslexic curves are well simulated assuming a narrow distribution of visual attention and a shifting of visual attention towards the left visual field. These behavioural and modelling findings are discussed in light of current theories of visual attention deficits in developmental dyslexia. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Cognitive Neuropsychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/02643294.2021.2004107
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      – Code: eng
        Text: English
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        PageCount: 17
        StartPage: 319
    Subjects:
      – SubjectFull: Dyslexia
        Type: general
      – SubjectFull: Word recognition
        Type: general
      – SubjectFull: Visual fields
        Type: general
      – SubjectFull: Attention span
        Type: general
      – SubjectFull: People with dyslexia
        Type: general
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      – TitleFull: Atypical viewing position effect in developmental dyslexia: A behavioural and modelling investigation.
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            NameFull: Valdois, Sylviane
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            NameFull: Phénix, Thierry
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            – D: 01
              M: 07
              Text: Jul2021
              Type: published
              Y: 2021
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            – TitleFull: Cognitive Neuropsychology
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