The time course of attentional focusing in dyslexic and normally reading children

A cue size procedure was used to evaluate the time course of visuo-spatial attention in dyslexic and normally reading children. When a stimulus target is presented inside a large cue vs a small cue the identification time is slower. In the present study two cue-target delays (100 and 500 ms) were us...

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Bibliographic Details
Published in:Brain and cognition 2003-11, Vol.53 (2), p.181-184
Main Authors: Facoetti, Andrea, Lorusso, Maria Luisa, Paganoni, Pierluigi, Cattaneo, Carmen, Galli, Raffaella, Mascetti, Gian Gastone
Format: Article
Language:English
Subjects:
Attention
Child
Cues
Dyslexia - physiopathology
Eye Movements - physiology
Female
Humans
Male
Parietal Lobe - physiopathology
Reaction Time
Space Perception - physiology
Visual Perception - physiology
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Summary:A cue size procedure was used to evaluate the time course of visuo-spatial attention in dyslexic and normally reading children. When a stimulus target is presented inside a large cue vs a small cue the identification time is slower. In the present study two cue-target delays (100 and 500 ms) were used. Results showed a slower time course of attentional focusing in dyslexics vs normal readers. Indeed, dyslexics exhibited no cue size effect at a shorter cue-target delay (100 ms), while it was present at a longer cue-target delay (500 ms). In contrast, a cue size effect was found at both cue-target delays in normally reading children. These results further support the hypothesis of sluggish automatic focusing of visual attention in dyslexics. This impairment could be a consequence of a general magnocellular deficit demonstrated previously in dyslexics.
ISSN:0278-2626
1090-2147
DOI:10.1016/S0278-2626(03)00105-2