Impaired Letter-String Processing in Developmental Dyslexia: What Visual-to-Phonology Code Mapping Disorder?

Dyslexia ◽  
2012 ◽  
Vol 18 (2) ◽  
pp. 77-93 ◽  
Author(s):  
Sylviane Valdois ◽  
Delphine Lassus-Sangosse ◽  
Muriel Lobier
Cortex ◽  
2010 ◽  
Vol 46 (10) ◽  
pp. 1272-1283 ◽  
Author(s):  
Maria De Luca ◽  
Cristina Burani ◽  
Despina Paizi ◽  
Donatella Spinelli ◽  
Pierluigi Zoccolotti

2015 ◽  
Vol 18 (1) ◽  
pp. 82-103
Author(s):  
Tru E. Kwong ◽  
Malinda Desjarlais ◽  
Megan L. Duffy

Differences in letter string processing between better and relatively poorer (average) spellers were examined. Forty undergraduate students completed a simultaneous orthographic matching task judging pairs of letter strings as same or different. Reading exposure, spelling, and reading habits were measured. Significant differences in reaction times, but not accuracy, were found between the two groups. When the groups were combined, a negative correlation was found between reaction time in the matching task and spelling ability. Taken together, these results suggest that unexpectedly poorer spellers tend to read words based on partial cues, while excellent spellers attend to entire words. Further, results indicate that processing partial vs. full cues may be a continuum, rather than a dichotomy, with even average spellers processing less than do excellent spellers. These results have implications for how unexpectedly poor spellers are defined in research and for the range of individuals who could improve their spelling by processing fuller cues.


2008 ◽  
Vol 107 (2) ◽  
pp. 158-166 ◽  
Author(s):  
Jacqueline A. Griego ◽  
Carlos R. Cortes ◽  
Sunitha Nune ◽  
Joscelyn E. Fisher ◽  
M.-A. Tagamets

2017 ◽  
Vol 31 (3) ◽  
pp. 583-605 ◽  
Author(s):  
Alexia Antzaka ◽  
Clara Martin ◽  
Sendy Caffarra ◽  
Sophie Schlöffel ◽  
Manuel Carreiras ◽  
...  

2012 ◽  
Vol 65 (3) ◽  
pp. 465-473 ◽  
Author(s):  
Maria Ktori ◽  
Jonathan Grainger ◽  
Stéphane Dufau

2002 ◽  
Vol 55 (2) ◽  
pp. 445-463 ◽  
Author(s):  
Laurent Auclair ◽  
Eric Siéroff

Three experiments studied the influence of spatial attention on familiar and unfamiliar letter string identification. Siéroff and Posner's (1988) cueing procedure was used: A cue indicated in advance either the beginning (left) or the end (right) of a foveally presented letter string that participants were instructed to read aloud. Results showed that the precue had a stronger influence on pseudoword than on word identification. Similar results were obtained when participants were instructed to report the identity of the cue or not. For pseudowords, a cueing effect was obtained regardless of length (6, 8, and 10 letters), whereas only 10-letter words showed such an effect, though to a lesser degree than pseudowords of the same length. However, results showed that shorter words were also influenced by the cue location when the exposure duration was reduced. Results are compatible with an early role of spatial attention in letter string processing, but they also suggest that the lexical status of a letter string can directly influence the distribution of attention before the identification process is completely achieved. Although orienting of spatial attention seems heavily involved in a pseudoword identification, some spatial attention mechanism could also take place in the case of familiar words. The results are discussed within two theoretical frameworks concerning the involvement of spatial attention in word identification: The “replacement” theory and the “redistribution” theory.


Author(s):  
K. Araki ◽  
K. Hinatsu ◽  
K. Itayama ◽  
T. Sahara ◽  
Y. Sakagami ◽  
...  

NeuroImage ◽  
2001 ◽  
Vol 13 (6) ◽  
pp. 874
Author(s):  
Piers Cornelissen ◽  
Antti Tarkiainen ◽  
Paivi Helenius ◽  
Riitta Salmelin

Author(s):  
Manuel Perea ◽  
Victoria Panadero

The vast majority of neural and computational models of visual-word recognition assume that lexical access is achieved via the activation of abstract letter identities. Thus, a word’s overall shape should play no role in this process. In the present lexical decision experiment, we compared word-like pseudowords like viotín (same shape as its base word: violín) vs. viocín (different shape) in mature (college-aged skilled readers), immature (normally reading children), and immature/impaired (young readers with developmental dyslexia) word-recognition systems. Results revealed similar response times (and error rates) to consistent-shape and inconsistent-shape pseudowords for both adult skilled readers and normally reading children – this is consistent with current models of visual-word recognition. In contrast, young readers with developmental dyslexia made significantly more errors to viotín-like pseudowords than to viocín-like pseudowords. Thus, unlike normally reading children, young readers with developmental dyslexia are sensitive to a word’s visual cues, presumably because of poor letter representations.


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