Abstract
The control of attentional orienting was studied in children with specific reading disorder (SRD) or dyslexia, and it was compared with that of normal readers. We used the covert orienting paradigm to measure subjects' reaction times for target detection both in valid and invalid cue conditions, either in the left or in the right visual fields. In experiment 1, we investigated exogenous orienting. The cue consisted of a peripheral abrupt onset and the cue-target delay was 350 ms. As compared with normal readers, in dyslexics the cue effect was absent in the right visual field, whereas in the left visual field a greater cue effect was observed. No visual field asymmetry was found in normal readers. In experiment 2, we investigated endogenous orienting. The cue was shown centrally and the cue-target delay was 750 ms. In dyslexics and normal readers, orienting of attention was present in both visual fields. However, in the invalid condition, dyslexic children showed significantly slower reaction times in the left visual field than in the right visual field. These results were interpreted as being due to an asymmetric control of visual spatial attention, possibly related with a posterior attention mechanism deficit in the right parietal cortex and/or an interhemispheric dysfunction and/or an impairment of cerebellar functions.
| Original language | English |
|---|---|
| Pages (from-to) | 46-53 |
| Number of pages | 8 |
| Journal | Experimental Brain Research |
| Volume | 138 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2001 |
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Keywords
- Dyslexia
- Orienting of attention
- Reaction time
- Spatial attention
- Visual asymmetry
ASJC Scopus subject areas
- Neuroscience(all)
Cite this
Orienting of visual attention in dyslexia : Evidence for asymmetric hemispheric control of attention. / Facoetti, A.; Turatto, M.; Lorusso, M. L.; Mascetti, G. G.
In: Experimental Brain Research, Vol. 138, No. 1, 2001, p. 46-53.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Orienting of visual attention in dyslexia
T2 - Evidence for asymmetric hemispheric control of attention
AU - Facoetti, A.
AU - Turatto, M.
AU - Lorusso, M. L.
AU - Mascetti, G. G.
PY - 2001
Y1 - 2001
N2 - The control of attentional orienting was studied in children with specific reading disorder (SRD) or dyslexia, and it was compared with that of normal readers. We used the covert orienting paradigm to measure subjects' reaction times for target detection both in valid and invalid cue conditions, either in the left or in the right visual fields. In experiment 1, we investigated exogenous orienting. The cue consisted of a peripheral abrupt onset and the cue-target delay was 350 ms. As compared with normal readers, in dyslexics the cue effect was absent in the right visual field, whereas in the left visual field a greater cue effect was observed. No visual field asymmetry was found in normal readers. In experiment 2, we investigated endogenous orienting. The cue was shown centrally and the cue-target delay was 750 ms. In dyslexics and normal readers, orienting of attention was present in both visual fields. However, in the invalid condition, dyslexic children showed significantly slower reaction times in the left visual field than in the right visual field. These results were interpreted as being due to an asymmetric control of visual spatial attention, possibly related with a posterior attention mechanism deficit in the right parietal cortex and/or an interhemispheric dysfunction and/or an impairment of cerebellar functions.
AB - The control of attentional orienting was studied in children with specific reading disorder (SRD) or dyslexia, and it was compared with that of normal readers. We used the covert orienting paradigm to measure subjects' reaction times for target detection both in valid and invalid cue conditions, either in the left or in the right visual fields. In experiment 1, we investigated exogenous orienting. The cue consisted of a peripheral abrupt onset and the cue-target delay was 350 ms. As compared with normal readers, in dyslexics the cue effect was absent in the right visual field, whereas in the left visual field a greater cue effect was observed. No visual field asymmetry was found in normal readers. In experiment 2, we investigated endogenous orienting. The cue was shown centrally and the cue-target delay was 750 ms. In dyslexics and normal readers, orienting of attention was present in both visual fields. However, in the invalid condition, dyslexic children showed significantly slower reaction times in the left visual field than in the right visual field. These results were interpreted as being due to an asymmetric control of visual spatial attention, possibly related with a posterior attention mechanism deficit in the right parietal cortex and/or an interhemispheric dysfunction and/or an impairment of cerebellar functions.
KW - Dyslexia
KW - Orienting of attention
KW - Reaction time
KW - Spatial attention
KW - Visual asymmetry
UR - http://www.scopus.com/inward/record.url?scp=0035072518&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035072518&partnerID=8YFLogxK
U2 - 10.1007/s002210100700
DO - 10.1007/s002210100700
M3 - Article
C2 - 11374082
AN - SCOPUS:0035072518
VL - 138
SP - 46
EP - 53
JO - Experimental Brain Research
JF - Experimental Brain Research
SN - 0014-4819
IS - 1
ER -