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

2016-10Journal article Restricted access
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dc.contributor.authorAraújo, Susana
dc.contributor.authorFaísca, Luís
dc.contributor.authorReis, Alexandra
dc.contributor.authorMarques, J. Frederico
dc.contributor.authorPetersson, Karl Magnus
dc.date.accessioned2024-03-12T09:44:16Z
dc.date.available2024-03-12T09:44:16Z
dc.date.issued2016-10
dc.date.updated2024-03-10T22:29:39Z
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 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAraújo, S., Faísca, L., Reis, A., Marques, J. F., & Petersson, K. M. (2016). Visual naming deficits in dyslexia: An ERP investigation of different processing domains. Neuropsychologia, 91, 61-76. https://doi.org/10.1016/j.neuropsychologia.2016.07.007pt_PT
dc.identifier.doi10.1016/j.neuropsychologia.2016.07.007pt_PT
dc.identifier.eissn1873-3514
dc.identifier.issn0028-3932
dc.identifier.slugcv-prod-996100
dc.identifier.urihttp://hdl.handle.net/10451/63358
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0028393216302457pt_PT
dc.subjectVisual namingpt_PT
dc.subjectDyslexiapt_PT
dc.subjectERPspt_PT
dc.titleVisual naming deficits in dyslexia: An ERP investigation of different processing domainspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage76pt_PT
oaire.citation.startPage61pt_PT
oaire.citation.titleNeuropsychologiapt_PT
oaire.citation.volume91pt_PT
person.familyNameAraújo
person.familyNameFaísca
person.familyNameReis
person.familyNameMarques
person.familyNamePetersson
person.givenNameSusana
person.givenNameLuís
person.givenNameAlexandra Isabel Dias Reis
person.givenNameJosé Frederico
person.givenNameKarl Magnus
person.identifier548901
person.identifierA-4633-2013
person.identifierA-3888-2013
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.orcid0000-0001-9436-1613
person.identifier.orcid0000-0002-8245-0392
person.identifier.ridA-7424-2013
person.identifier.ridA-2379-2008
person.identifier.scopus-author-id36678827900
person.identifier.scopus-author-id6503944802
person.identifier.scopus-author-id7202574376
person.identifier.scopus-author-id6508299903
rcaap.cv.cienciaidF619-7368-0984 | Susana Araújo
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication5ed525a9-5ad8-40bf-a790-515b72702497
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relation.isAuthorOfPublication.latestForDiscovery8af065f5-fa36-4bdd-a80f-565c48f457a8

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