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Lexical and sublexical orthographic processing: An ERP study with skilled and dyslexic adult readers.

Araújo, Susana; Faísca, Luís; Bramao, Ines LU ; Reis, Alexandra and Petersson, Karl Magnus (2015) In Brain and Language 141. p.16-27
Abstract
This ERP study investigated the cognitive nature of the P1-N1 components during orthographic processing. We used an implicit reading task with various types of stimuli involving different amounts of sublexical or lexical orthographic processing (words, pseudohomophones, pseudowords, nonwords, and symbols), and tested average and dyslexic readers. An orthographic regularity effect (pseudowords-nonwords contrast) was observed in the average but not in the dyslexic group. This suggests an early sensitivity to the dependencies among letters in word-forms that reflect orthographic structure, while the dyslexic brain apparently fails to be appropriately sensitive to these complex features. Moreover, in the adults the N1-response may already... (More)
This ERP study investigated the cognitive nature of the P1-N1 components during orthographic processing. We used an implicit reading task with various types of stimuli involving different amounts of sublexical or lexical orthographic processing (words, pseudohomophones, pseudowords, nonwords, and symbols), and tested average and dyslexic readers. An orthographic regularity effect (pseudowords-nonwords contrast) was observed in the average but not in the dyslexic group. This suggests an early sensitivity to the dependencies among letters in word-forms that reflect orthographic structure, while the dyslexic brain apparently fails to be appropriately sensitive to these complex features. Moreover, in the adults the N1-response may already reflect lexical access: (i) the N1 was sensitive to the familiar vs. less familiar orthographic sequence contrast; (ii) and early effects of the phonological form (words-pseudohomophones contrast) were also found. Finally, the later N320 component was attenuated in the dyslexics, suggesting suboptimal processing in later stages of phonological analysis. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Brain and Language
volume
141
pages
16 - 27
publisher
Academic Press
external identifiers
  • pmid:25528285
  • wos:000349430300003
  • scopus:84918787802
ISSN
1090-2155
DOI
10.1016/j.bandl.2014.11.007
language
English
LU publication?
yes
id
eb9576b8-009c-4550-9b1f-d8ea2a67f154 (old id 4905859)
date added to LUP
2015-01-12 16:31:45
date last changed
2017-07-30 03:21:53
@article{eb9576b8-009c-4550-9b1f-d8ea2a67f154,
  abstract     = {This ERP study investigated the cognitive nature of the P1-N1 components during orthographic processing. We used an implicit reading task with various types of stimuli involving different amounts of sublexical or lexical orthographic processing (words, pseudohomophones, pseudowords, nonwords, and symbols), and tested average and dyslexic readers. An orthographic regularity effect (pseudowords-nonwords contrast) was observed in the average but not in the dyslexic group. This suggests an early sensitivity to the dependencies among letters in word-forms that reflect orthographic structure, while the dyslexic brain apparently fails to be appropriately sensitive to these complex features. Moreover, in the adults the N1-response may already reflect lexical access: (i) the N1 was sensitive to the familiar vs. less familiar orthographic sequence contrast; (ii) and early effects of the phonological form (words-pseudohomophones contrast) were also found. Finally, the later N320 component was attenuated in the dyslexics, suggesting suboptimal processing in later stages of phonological analysis.},
  author       = {Araújo, Susana and Faísca, Luís and Bramao, Ines and Reis, Alexandra and Petersson, Karl Magnus},
  issn         = {1090-2155},
  language     = {eng},
  pages        = {16--27},
  publisher    = {Academic Press},
  series       = {Brain and Language},
  title        = {Lexical and sublexical orthographic processing: An ERP study with skilled and dyslexic adult readers.},
  url          = {http://dx.doi.org/10.1016/j.bandl.2014.11.007},
  volume       = {141},
  year         = {2015},
}