Pictogram naming in dyslexic and normal children assessed by SLO.
We measured pictogram naming (PN) and text reading in dyslexic and normally reading young teenagers. Eye movements were monitored by scanning laser ophthalmoscope, revealing positions of fovea, stimuli on the retina, and speech simultaneously. While text reading speed showed the expected difference between groups, PN speeds overlapped widely. PN was mainly controlled by retrieval time in both groups and correlated with age in dyslexics. During PN, only backward saccades occurred more frequently in dyslexics. We conclude that PN activates visual/eidetic mechanisms that are distinct from the phonemic/analytic pathway necessary for reading. This dual organization leads to a wide range of combinations of performances in PN and text reading.
Trauzettel-Klosinski
Susanne
S
Department of Pathophysiology of Vision and Neuroophthalmology, University Eye Hospital, 72076 Tübingen, Germany. susanne.trauzettel-klosinski@uni-tuebingen.de
MacKeben
Manfred
M
Reinhard
Jens
J
Feucht
Antje
A
Dürrwächter
Ute
U
Klosinski
Gunther
G
D002648:Child; D004410:Dyslexia / Q000503:physiopathology* / Q000523:psychology; D005133:Eye Movements; D005260:Female; D006801:Humans; D008297:Male; D009887:Ophthalmoscopy / Q000379:methods; D010364:Pattern Recognition, Visual; D011930:Reaction Time; D011932:Reading