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Détail de l'auteur
Auteur Peter E. CLAYSON |
Documents disponibles écrits par cet auteur (2)
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An Electrophysiological Investigation of Interhemispheric Transfer Time in Children and Adolescents with High-Functioning Autism Spectrum Disorders / Ann CLAWSON in Journal of Autism and Developmental Disorders, 45-2 (February 2015)
[article]
Titre : An Electrophysiological Investigation of Interhemispheric Transfer Time in Children and Adolescents with High-Functioning Autism Spectrum Disorders Type de document : Texte imprimé et/ou numérique Auteurs : Ann CLAWSON, Auteur ; Peter E. CLAYSON, Auteur ; Mikle SOUTH, Auteur ; Erin D. BIGLER, Auteur ; Michael J. LARSON, Auteur Article en page(s) : p.363-375 Langues : Anglais (eng) Mots-clés : Autism Interhemispheric transfer time N1 P1 Event-related potential Corpus callosum White matter Index. décimale : PER Périodiques Résumé : Little is known about the functional impact of putative deficits in white-matter connectivity across the corpus callosum (CC) in individuals with autism spectrum disorders (ASDs). We utilized the temporal sensitivity of event-related potentials to examine the interhemispheric transfer time (IHTT) of basic visual information across the CC in youth with high-functioning ASD relative to healthy controls. We conducted two experiments: a visual letter matching experiment (n = 46) and a visual picture matching experiment, (n = 48) and utilized both electrophysiological (N1 and P1 amplitudes and latencies) and behavioral [response times (RTs), error rates] indices of IHTT. There were no significant group differences on either experiment for RTs, error rates, or N1 and P1 latencies, suggesting that on basic tasks the timing of information flow across the CC may not be altered in high functioning ASD. En ligne : http://dx.doi.org/10.1007/s10803-013-1895-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=258
in Journal of Autism and Developmental Disorders > 45-2 (February 2015) . - p.363-375[article] An Electrophysiological Investigation of Interhemispheric Transfer Time in Children and Adolescents with High-Functioning Autism Spectrum Disorders [Texte imprimé et/ou numérique] / Ann CLAWSON, Auteur ; Peter E. CLAYSON, Auteur ; Mikle SOUTH, Auteur ; Erin D. BIGLER, Auteur ; Michael J. LARSON, Auteur . - p.363-375.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 45-2 (February 2015) . - p.363-375
Mots-clés : Autism Interhemispheric transfer time N1 P1 Event-related potential Corpus callosum White matter Index. décimale : PER Périodiques Résumé : Little is known about the functional impact of putative deficits in white-matter connectivity across the corpus callosum (CC) in individuals with autism spectrum disorders (ASDs). We utilized the temporal sensitivity of event-related potentials to examine the interhemispheric transfer time (IHTT) of basic visual information across the CC in youth with high-functioning ASD relative to healthy controls. We conducted two experiments: a visual letter matching experiment (n = 46) and a visual picture matching experiment, (n = 48) and utilized both electrophysiological (N1 and P1 amplitudes and latencies) and behavioral [response times (RTs), error rates] indices of IHTT. There were no significant group differences on either experiment for RTs, error rates, or N1 and P1 latencies, suggesting that on basic tasks the timing of information flow across the CC may not be altered in high functioning ASD. En ligne : http://dx.doi.org/10.1007/s10803-013-1895-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=258 Cognitive control and conflict adaptation in youth with high-functioning autism / Michael J. LARSON in Journal of Child Psychology and Psychiatry, 53-4 (April 2012)
[article]
Titre : Cognitive control and conflict adaptation in youth with high-functioning autism Type de document : Texte imprimé et/ou numérique Auteurs : Michael J. LARSON, Auteur ; Mikle SOUTH, Auteur ; Peter E. CLAYSON, Auteur ; Ann CLAWSON, Auteur Année de publication : 2012 Article en page(s) : p.440-448 Langues : Anglais (eng) Mots-clés : N2 event-related potential autism conflict adaptation cognitive control Index. décimale : PER Périodiques Résumé : Background: Youth diagnosed with autism spectrum disorders (ASD) often show deficits in cognitive control processes, potentially contributing to characteristic difficulties monitoring and regulating behavior. Modification of performance following conflict can be measured by examining conflict adaptation, the adjustment of cognitive resources based on previous-trial conflict. The electrophysiological correlates of these processes can be measured using the N2, a stimulus-locked component of the event-related potential (ERP). Methods: High-density ERPs and behavioral data [i.e. response times (RTs) and error rates] were acquired while 28 youth with ASD and 36 typically developing controls completed a modified Eriksen flanker task. Results: Behaviorally, groups showed similar conflict adaptation effects; youth with ASD showed larger RT slowing on switch trials. For electrophysiology, controls demonstrated larger N2 amplitudes for incongruent (high-conflict) trials following congruent (low-conflict) trials than for incongruent trials following incongruent trials. Importantly, youth with ASD showed no such differences in N2 amplitude based on previous-trial conflict. Conclusions: Lack of electrophysiological conflict adaptation effects in youth with ASD indicates irregular neural processing associated with conflict adaptation. Individuals with ASD show declines in level of conflict evaluation and adaptation. Future research is necessary to accurately characterize and understand the behavioral implications of these cognitive control deficits relative to diagnostic severity, anxiety, and personality. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02498.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=152
in Journal of Child Psychology and Psychiatry > 53-4 (April 2012) . - p.440-448[article] Cognitive control and conflict adaptation in youth with high-functioning autism [Texte imprimé et/ou numérique] / Michael J. LARSON, Auteur ; Mikle SOUTH, Auteur ; Peter E. CLAYSON, Auteur ; Ann CLAWSON, Auteur . - 2012 . - p.440-448.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 53-4 (April 2012) . - p.440-448
Mots-clés : N2 event-related potential autism conflict adaptation cognitive control Index. décimale : PER Périodiques Résumé : Background: Youth diagnosed with autism spectrum disorders (ASD) often show deficits in cognitive control processes, potentially contributing to characteristic difficulties monitoring and regulating behavior. Modification of performance following conflict can be measured by examining conflict adaptation, the adjustment of cognitive resources based on previous-trial conflict. The electrophysiological correlates of these processes can be measured using the N2, a stimulus-locked component of the event-related potential (ERP). Methods: High-density ERPs and behavioral data [i.e. response times (RTs) and error rates] were acquired while 28 youth with ASD and 36 typically developing controls completed a modified Eriksen flanker task. Results: Behaviorally, groups showed similar conflict adaptation effects; youth with ASD showed larger RT slowing on switch trials. For electrophysiology, controls demonstrated larger N2 amplitudes for incongruent (high-conflict) trials following congruent (low-conflict) trials than for incongruent trials following incongruent trials. Importantly, youth with ASD showed no such differences in N2 amplitude based on previous-trial conflict. Conclusions: Lack of electrophysiological conflict adaptation effects in youth with ASD indicates irregular neural processing associated with conflict adaptation. Individuals with ASD show declines in level of conflict evaluation and adaptation. Future research is necessary to accurately characterize and understand the behavioral implications of these cognitive control deficits relative to diagnostic severity, anxiety, and personality. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02498.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=152