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Updated: Aug 29, 2026

Advancing Dyslexia Assessment in Children Through Computerized Testing
Published on: August 16, 2024
Visual information processing in dyslexic children
P Scheuerpflug1, E Plume, V Vetter
1Department of Child and Adolescent Psychiatry, University of Wuerzburg, Fuechsleinstrasse 15, 97080 Wuerzburg, Germany. scheuerpflug@kjp.uni-wuerzburg.de
Objective:
Several studies presented evidence for magnocellular deficits in dyslexics both in behavioural as well as in electrophysiological data of local electrode sites. We investigated two well-known paradigms (motion-onset and random-dot-kinematogram) with regard to global electrophysiological parameters.
Methods:
Twenty-one-channel event-related potentials (ERPs) of 16 dyslectic and 15 control children were analyzed with reference-independent methods. For each paradigm quasi stable microstates were identified by means of a data-driven segmentation procedure and compared between both groups.
Results:
Differences in global ERP responses between dyslexic and control children could be found for rapid moving gratings but not for the dot coherence.
Conclusions:
Dyslexic children seem to have some highly specific visual deficits in processing moving stimuli. These deficits can be related to the magnocellular system.
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