Archive for July, 2006
Parietal function in good and poor readers
Background:
While there are many psychophysical reports of impaired magnocellular pathway function in developmental dyslexia (DD), few have investigated parietal function, the major projection of this pathway, in good and poor readers closely matched for nonverbal intelligence. In view of new feedforward-feedback theories of visual processing, impaired magnocellular function raises the question of whether all visually-driven functions or only those associated with parietal cortex functions are equally impaired and if so, whether parietal performance is more closely related to general ability levels than reading ability.
Methods:
Reading accuracy and performance on psychophysical tasks purported to selectively activate parietal cortex such a…
Delayed detection of tonal targets in background noise in dyslexia.
Related Articles
Delayed detection of tonal targets in background noise in dyslexia.
Brain Lang. 2006 Aug 1;
Authors: Chait M, Eden G, Poeppel D, Simon JZ, Hill DF, Flowers DL
Individuals with developmental dyslexia are often impaired in their ability to process certain linguistic and even basic non-linguistic auditory signals. Recent investigations report conflicting findings regarding impaired low-level binaural detection mechanisms associated with dyslexia. Binaural impairment has been hypothesized to stem from a general low-level processing disorder for temporally fine sensory stimuli. Here we use a new behavioral paradigm to address this issue. We compared the response times of dyslexic listeners and t…
Speech perception in preschoolers at family risk for dyslexia: relations with low-level auditory processing and phonological ability.
Related Articles
Speech perception in preschoolers at family risk for dyslexia: Relations with low-level auditory processing and phonological ability.
Brain Lang. 2006 Aug 1;
Authors: Boets B, Ghesquière P, van Wieringen A, Wouters J
We tested categorical perception and speech-in-noise perception in a group of five-year-old preschool children genetically at risk for dyslexia, compared to a group of well-matched control children and a group of adults. Both groups of children differed significantly from the adults on all speech measures. Comparing both child groups, the risk group presented a slight but significant deficit in speech-in-noise perception, particularly in the most difficult listening condition….
Neuroanatomical and behavioral asymmetry in an adult compensated dyslexic.
Related Articles
Neuroanatomical and behavioral asymmetry in an adult compensated dyslexic.
Brain Lang. 2006 Aug;98(2):169-81
Authors: Chiarello C, Lombardino LJ, Kacinik NA, Otto R, Leonard CM
Individual differences in cortical anatomy are readily observable, but their functional significance for behaviors such as reading is not well understood. Here, we report a case of an apparent compensated dyslexic who had attained high achievement in visuospatial mathematics. Data from a detailed background interview, psychometric testing, divided visual field tasks measuring basic word recognition (word naming, nonword naming, and lexical decision), and more controlled word retrieval (verb, category, and rhyme gener…
The effect of word length on lexical decision in dyslexic and normal reading children.
Related Articles
The effect of word length on lexical decision in dyslexic and normal reading children.
Brain Lang. 2006 Aug;98(2):140-9
Authors: Martens VE, de Jong PF
In the present study, the effect of word length on lexical decision in dyslexic and normal reading children was investigated. Dyslexics of 10-years old, chronological age controls, and reading age controls read words and pseudowords consisting of 3 to 6 letters in a lexical decision task. Length effects were much stronger in dyslexics and reading age controls than in chronological age controls. These results support the contention that dyslexics continue to rely on a predominantly sub-lexical reading procedure, whereas for normal readers the…
Learning Disabilities: NIH Turns To FSU For Top Research
Florida State University has been awarded a $6-million grant from the federal government over five years to fund research efforts aimed at more effectively understanding, predicting and preventing the development of learning disabilities such as dyslexia in children, it was announced today.The grant will fund the creation of a National Institutes of Health (NIH) Multidisciplinary Learning Disabilities Center at FSU. [click link for full article]Original post by Allergy News From Medical News Today
No comments