Efficiency of visual information processing in children at-risk for dyslexia: Habituation of single-trial ERPs

To investigate underlying learning mechanisms in relation to the development of dyslexia, event-related potentials to visual standards were recorded in five-year-old pre-reading children at-risk for familial dyslexia ( n = 24) and their controls ( n = 14). At the end of second grade the children age...

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Bibliographic Details
Published in:Brain and language 2006-09, Vol.98 (3), p.319-331
Main Authors: Regtvoort, Anne G.F.M., van Leeuwen, Theo H., Stoel, Reinoud D., van der Leij, Aryan
Format: Article
Language:English
Subjects:
Biological and medical sciences
Brain - physiology
Child
Child clinical studies
Children
Cognitive Processes
Control Groups
Data Analysis
Disorders of higher nervous function. Focal brain diseases. Central vestibular syndrome and deafness. Brain stem syndromes
Dyslexia
Dyslexia - diagnosis
Efficiency
Electroencephalography
Electrooculography
Elementary School Students
Event-related potential
Evoked Potentials - physiology
Factor Analysis
Female
Foreign Countries
Grade 2
Habituation
Habituation, Psychophysiologic
Humans
Kindergarten
Language and communication disorders
Learning Disabilities
Literacy
Male
Medical sciences
Nerve Net - physiology
Nervous system (semeiology, syndromes)
Netherlands
Neurology
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Reaction Time
Reading Ability
Risk
Risk Factors
Single trial
Visual
Visual Perception
Visual Stimuli
Young Children
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Summary:To investigate underlying learning mechanisms in relation to the development of dyslexia, event-related potentials to visual standards were recorded in five-year-old pre-reading children at-risk for familial dyslexia ( n = 24) and their controls ( n = 14). At the end of second grade the children aged 8 years were regrouped into three groups according to literacy level and risk factor. Single-trial analyses revealed N1 habituation in the normal-reading controls, but not in the normal-reading at-risks, and a N1 amplitude increase in the group of poor-reading at-risks and poor-reading controls. No P3 habituation was found in either group. The normal-reading at-risk group exhibited the longest N1 and P3 latencies, possibly compensating for their reduced neuronal activity during initial information extraction. In contrast, the poor-reading group only showed prolonged P3, and their increase in (initial small) N1 amplitude together with normal N1 latencies, suggests inefficient processing in an early time window, which might explain automatisation difficulties in dyslexic readers.
ISSN:0093-934X
1090-2155
DOI:10.1016/j.bandl.2006.06.006