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Coherence motion perception in developmental dyslexia: a meta-analysis of behavioral studies.

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Title: Coherence motion perception in developmental dyslexia: a meta-analysis of behavioral studies.
Authors: Benassi M (AUTHOR), Simonelli L (AUTHOR), Giovagnoli S (AUTHOR), Bolzani R (AUTHOR)
Source: Dyslexia (10769242). Nov2010, Vol. 16 Issue 4, p341-357. 17p.
Abstract: The magnitude of the association between developmental dyslexia (DD) and motion sensitivity is evaluated in 35 studies, which investigated coherence motion perception in DD. A first analysis is conducted on the differences between DD groups and age-matched control (C) groups. In a second analysis, the relationship between motion coherence threshold and reading ability is considered. Globally, the mean effect size (ES) is moderate (d = 0.675, 2334 subjects) with a large value (d = 0.747) for the between-groups differences in motion perception and a smaller mean ES (d = 0.178) for the correlational studies. The influence on ES of the stimuli parameters and subjects age is analyzed. The number of dots, the age of the subjects, and the type of analysis (i.e. between-group or correlational) are significantly related to the ES. Looking at the ES values, a smaller number of dots constituting the stimuli are associated with larger ES and, interestingly, the children studies are associated with lower ES in comparison with the researches evaluating adults. The large ES value supports the importance of studying motion perception deficits in DD groups, consistently with the claim that dorsal impairment/noise-exclusion deficit could be one of the risk factor of reading difficulties. Copyright © 2010 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
Copyright of Dyslexia (10769242) is the property of Wiley-Blackwell 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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PubType: Academic Journal
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  Data: Coherence motion perception in developmental dyslexia: a meta-analysis of behavioral studies.
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  Data: <searchLink fieldCode="AR" term="%22Benassi+M%22">Benassi M</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Simonelli+L%22">Simonelli L</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Giovagnoli+S%22">Giovagnoli S</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bolzani+R%22">Bolzani R</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Dyslexia+%2810769242%29%22">Dyslexia (10769242)</searchLink>. Nov2010, Vol. 16 Issue 4, p341-357. 17p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The magnitude of the association between developmental dyslexia (DD) and motion sensitivity is evaluated in 35 studies, which investigated coherence motion perception in DD. A first analysis is conducted on the differences between DD groups and age-matched control (C) groups. In a second analysis, the relationship between motion coherence threshold and reading ability is considered. Globally, the mean effect size (ES) is moderate (d = 0.675, 2334 subjects) with a large value (d = 0.747) for the between-groups differences in motion perception and a smaller mean ES (d = 0.178) for the correlational studies. The influence on ES of the stimuli parameters and subjects age is analyzed. The number of dots, the age of the subjects, and the type of analysis (i.e. between-group or correlational) are significantly related to the ES. Looking at the ES values, a smaller number of dots constituting the stimuli are associated with larger ES and, interestingly, the children studies are associated with lower ES in comparison with the researches evaluating adults. The large ES value supports the importance of studying motion perception deficits in DD groups, consistently with the claim that dorsal impairment/noise-exclusion deficit could be one of the risk factor of reading difficulties. Copyright © 2010 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Dyslexia (10769242) is the property of Wiley-Blackwell 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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        Value: 10.1002/dys.412
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        Text: English
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              Text: Nov2010
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