Repository logo
 
Publication

Visual naming deficits in dyslexia: An ERP investigation of different processing domains

2016-10Journal article Restricted access
Simple item page
dc.contributor.authorAraújo, Susana
dc.contributor.authorFaísca, Luís
dc.contributor.authorReis, Alexandra
dc.contributor.authorFrederico Marques, J.
dc.contributor.authorPetersson, Karl Magnus
dc.date.accessioned2017-04-07T15:55:55Z
dc.date.available2017-04-07T15:55:55Z
dc.date.issued2016-10
dc.description.abstractNaming speed deficits are well documented in developmental dyslexia, expressed by slower naming times and more errors in response to familiar items. Here we used event-related potentials (ERPs) to examine at what processing level the deficits in dyslexia emerge during a discrete-naming task. Dyslexic and skilled adult control readers performed a primed object-naming task, in which the relationship between the prime and the target was manipulated along perceptual, semantic and phonological dimensions. A 3 x 2 design that crossed Relationship Type (Visual, Phonemic Onset, and Semantic) with Relatedness (Related and Unrelated) was used. An attenuated N/P190 - indexing early visual processing and N300 - which index late visual processing was observed to pictures preceded by perceptually related (vs. unrelated) primes in the control but not in the dyslexic group. These findings suggest suboptimal processing in early stages of object processing in dyslexia, when integration and mapping of perceptual information to a more form-specific percept in memory take place. On the other hand, both groups showed an N400 effect associated with semantically related pictures (vs. unrelated), taken to reflect intact integration of semantic similarities in both dyslexic and control readers. We also found an electrophysiological effect of phonological priming in the N400 range that is, an attenuated N400 to objects preceded by phonemic related primes vs. unrelated while it showed a more widespread distributed and more pronounced over the right hemisphere in the dyslexics. Topographic differences between groups might have originated from a word form encoding process with different characteristics in dyslexics compared to control readers. (C) 2016 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.neuropsychologia.2016.07.007
dc.identifier.issn0028-3932
dc.identifier.urihttp://hdl.handle.net/10400.1/9261
dc.language.isoeng
dc.peerreviewedyes
dc.relation.isbasedonWOS:000387194200006
dc.titleVisual naming deficits in dyslexia: An ERP investigation of different processing domains
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F72974%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FPSI-PCO%2F110734%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PEst-OE%2FEQB%2FLA0023%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/Incentivo%2FEQB%2FLA0023%2F2014/PT
oaire.citation.endPage76
oaire.citation.startPage61
oaire.citation.titleNeuropsychologia
oaire.citation.volume91
oaire.fundingStreamSFRH
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
person.familyNameAraújo
person.familyNameFaísca
person.familyNameReis
person.familyNamePetersson
person.givenNameSusana
person.givenNameLuís
person.givenNameAlexandra
person.givenNameKarl Magnus
person.identifier548901
person.identifierA-4633-2013
person.identifier387336
person.identifier13089
person.identifier.ciencia-id5719-6727-C596
person.identifier.ciencia-id4B10-E7E6-1D6A
person.identifier.ciencia-id6D14-B1D1-1532
person.identifier.orcid0000-0002-0354-3348
person.identifier.orcid0000-0003-4859-8817
person.identifier.orcid0000-0001-5598-0999
person.identifier.orcid0000-0002-8245-0392
person.identifier.ridA-7424-2013
person.identifier.ridE-8188-2012
person.identifier.scopus-author-id36678827900
person.identifier.scopus-author-id6503944802
person.identifier.scopus-author-id7202574376
person.identifier.scopus-author-id7006470225
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication624902bb-0364-40ac-8ea4-3c0de3456818
relation.isAuthorOfPublicatione21a01b7-3ea3-45b1-97db-f6553ead69a1
relation.isAuthorOfPublication4773c6f5-4b9c-4cbf-b8ef-7386f5d8a93d
relation.isAuthorOfPublication0f437ab3-c630-40ad-963f-13196ad4fbd6
relation.isAuthorOfPublication.latestForDiscovery4773c6f5-4b9c-4cbf-b8ef-7386f5d8a93d
relation.isProjectOfPublicationb2781bbe-105c-46cb-bec4-a89734413564
relation.isProjectOfPublication3fb14368-8cf2-4574-ac67-6c35b5550c90
relation.isProjectOfPublication89fcacba-95e1-424f-aee5-1a0bdc3d7303
relation.isProjectOfPublication824fd307-1755-4a52-8f88-b1bcb2694b00
relation.isProjectOfPublication.latestForDiscovery824fd307-1755-4a52-8f88-b1bcb2694b00

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Araújo et al. 2016_Neuropychologia.pdf
Size:
1.5 MB
Format:
Adobe Portable Document Format
Download

Collections

FCB2-Artigos (em revistas ou actas indexadas)
FCH2-Artigos (em revistas ou actas indexadas)