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Auteur Johanna G. BARRY |
Documents disponibles écrits par cet auteur (2)
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Late, not early mismatch responses to changes in frequency are reduced or deviant in children with dyslexia: an event-related potential study / L. F. HALLIDAY in Journal of Neurodevelopmental Disorders, 6-1 (December 2014)
[article]
Titre : Late, not early mismatch responses to changes in frequency are reduced or deviant in children with dyslexia: an event-related potential study Type de document : Texte imprimé et/ou numérique Auteurs : L. F. HALLIDAY, Auteur ; Johanna G. BARRY, Auteur ; M. J. HARDIMAN, Auteur ; Dorothy V. M. BISHOP, Auteur Article en page(s) : p.21 Langues : Anglais (eng) Mots-clés : Dyslexia Event-related desynchronization Event-related spectral perturbation Frequency discrimination Inter-trial coherence Ldn Late discriminative negativity Mmn Mismatch negativity Phase locking Index. décimale : PER Périodiques Résumé : BACKGROUND: Developmental disorders of oral and written language have been linked to deficits in the processing of auditory information. However, findings have been inconsistent, both for behavioural and electrophysiological measures. METHODS: In this study, we examined event-related potentials (ERPs) in 20 6- to 14-year-old children with developmental dyslexia and 20 age-matched controls, divided into younger (6-11 years, n = 10) and older (11-14 years, n = 10) age bands. We focused on early (mismatch negativity; MMN) and late (late discriminative negativity; LDN) conventional mismatch responses and associated measures derived from time-frequency analysis (inter-trial coherence and event-related spectral perturbation). Responses were elicited using an auditory oddball task, whereby a stream of 1000-Hz standards was interspersed with rare large (1,200 Hz) and small (1,030 Hz) frequency deviants. RESULTS: Conventional analyses revealed no significant differences between groups in the size of the MMN to either large or small frequency deviants. However, the younger age band of children with dyslexia showed an enhanced inter-trial coherence in the theta frequency band over the time window corresponding to the MMN to small deviants. By contrast, these same children showed a reduced-amplitude LDN for the small deviants relative to their age-matched controls, whilst the older children with dyslexia showed a shorter and less intense period of event-related desynchronization over this time window. CONCLUSIONS: Initial detection and discrimination of auditory frequency change appears normal or even enhanced in children with dyslexia. Rather, deficits in late-stage auditory processing appear to be a feature of this population. En ligne : http://dx.doi.org/10.1186/1866-1955-6-21 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=346
in Journal of Neurodevelopmental Disorders > 6-1 (December 2014) . - p.21[article] Late, not early mismatch responses to changes in frequency are reduced or deviant in children with dyslexia: an event-related potential study [Texte imprimé et/ou numérique] / L. F. HALLIDAY, Auteur ; Johanna G. BARRY, Auteur ; M. J. HARDIMAN, Auteur ; Dorothy V. M. BISHOP, Auteur . - p.21.
Langues : Anglais (eng)
in Journal of Neurodevelopmental Disorders > 6-1 (December 2014) . - p.21
Mots-clés : Dyslexia Event-related desynchronization Event-related spectral perturbation Frequency discrimination Inter-trial coherence Ldn Late discriminative negativity Mmn Mismatch negativity Phase locking Index. décimale : PER Périodiques Résumé : BACKGROUND: Developmental disorders of oral and written language have been linked to deficits in the processing of auditory information. However, findings have been inconsistent, both for behavioural and electrophysiological measures. METHODS: In this study, we examined event-related potentials (ERPs) in 20 6- to 14-year-old children with developmental dyslexia and 20 age-matched controls, divided into younger (6-11 years, n = 10) and older (11-14 years, n = 10) age bands. We focused on early (mismatch negativity; MMN) and late (late discriminative negativity; LDN) conventional mismatch responses and associated measures derived from time-frequency analysis (inter-trial coherence and event-related spectral perturbation). Responses were elicited using an auditory oddball task, whereby a stream of 1000-Hz standards was interspersed with rare large (1,200 Hz) and small (1,030 Hz) frequency deviants. RESULTS: Conventional analyses revealed no significant differences between groups in the size of the MMN to either large or small frequency deviants. However, the younger age band of children with dyslexia showed an enhanced inter-trial coherence in the theta frequency band over the time window corresponding to the MMN to small deviants. By contrast, these same children showed a reduced-amplitude LDN for the small deviants relative to their age-matched controls, whilst the older children with dyslexia showed a shorter and less intense period of event-related desynchronization over this time window. CONCLUSIONS: Initial detection and discrimination of auditory frequency change appears normal or even enhanced in children with dyslexia. Rather, deficits in late-stage auditory processing appear to be a feature of this population. En ligne : http://dx.doi.org/10.1186/1866-1955-6-21 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=346 The broader language phenotype of autism: a comparison with specific language impairment / Andrew J. O. WHITEHOUSE in Journal of Child Psychology and Psychiatry, 48-8 (August 2007)
[article]
Titre : The broader language phenotype of autism: a comparison with specific language impairment Type de document : Texte imprimé et/ou numérique Auteurs : Andrew J. O. WHITEHOUSE, Auteur ; Johanna G. BARRY, Auteur ; Dorothy V. M. BISHOP, Auteur Année de publication : 2007 Article en page(s) : p.822–830 Langues : Anglais (eng) Mots-clés : Autism-spectrum-disorder specific-language-impairment broad-phenotype genetics Index. décimale : PER Périodiques Résumé : Background: Some individuals with autism spectrum disorders (ASD) experience linguistic difficulties similar to those found in individuals with specific language impairment (SLI). Whether these behaviours are indicative of a common underlying genetic cause or a superficial similarity is unclear.
Methods: Standardised language assessments were administered to three participant groups: parents of children with ASD (Par-A), parents of children with specific language/literacy impairment (Par-L) and parents of typically developing children (Par-T) (n = 30, in each group). Additionally, the Autism-Spectrum Quotient (AQ) was used to assess autism-like tendencies, in particular, social language use.
Results: The Par-A group performed better than the Par-L group (and identical to the Par-T group) on all language tests. Conversely, the Par-A group was characterised by higher levels of pragmatic difficulties than the other two groups, as measured by the communication subscale of the AQ.
Conclusions: No evidence was found for a shared phenotype in parents of children with ASD and SLI. A model is presented describing the relation between SLI and ASD.En ligne : http://dx.doi.org/10.1111/j.1469-7610.2007.01765.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=162
in Journal of Child Psychology and Psychiatry > 48-8 (August 2007) . - p.822–830[article] The broader language phenotype of autism: a comparison with specific language impairment [Texte imprimé et/ou numérique] / Andrew J. O. WHITEHOUSE, Auteur ; Johanna G. BARRY, Auteur ; Dorothy V. M. BISHOP, Auteur . - 2007 . - p.822–830.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 48-8 (August 2007) . - p.822–830
Mots-clés : Autism-spectrum-disorder specific-language-impairment broad-phenotype genetics Index. décimale : PER Périodiques Résumé : Background: Some individuals with autism spectrum disorders (ASD) experience linguistic difficulties similar to those found in individuals with specific language impairment (SLI). Whether these behaviours are indicative of a common underlying genetic cause or a superficial similarity is unclear.
Methods: Standardised language assessments were administered to three participant groups: parents of children with ASD (Par-A), parents of children with specific language/literacy impairment (Par-L) and parents of typically developing children (Par-T) (n = 30, in each group). Additionally, the Autism-Spectrum Quotient (AQ) was used to assess autism-like tendencies, in particular, social language use.
Results: The Par-A group performed better than the Par-L group (and identical to the Par-T group) on all language tests. Conversely, the Par-A group was characterised by higher levels of pragmatic difficulties than the other two groups, as measured by the communication subscale of the AQ.
Conclusions: No evidence was found for a shared phenotype in parents of children with ASD and SLI. A model is presented describing the relation between SLI and ASD.En ligne : http://dx.doi.org/10.1111/j.1469-7610.2007.01765.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=162