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Auteur Lynnette M. HENDERSON |
Documents disponibles écrits par cet auteur (2)
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Accessing and selecting word meaning in autism spectrum disorder / Lynnette M. HENDERSON in Journal of Child Psychology and Psychiatry, 52-9 (September 2011)
[article]
Titre : Accessing and selecting word meaning in autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : Lynnette M. HENDERSON, Auteur ; Paula J. CLARKE, Auteur ; Margaret J. SNOWLING, Auteur Année de publication : 2011 Article en page(s) : p.964-973 Langues : Anglais (eng) Mots-clés : Language comprehension ambiguity resolution semantic priming homonyms poor comprehenders Index. décimale : PER Périodiques Résumé : Background: Comprehension difficulties are commonly reported in autism spectrum disorder (ASD) but the causes of these difficulties are poorly understood. This study investigates how children with ASD access and select meanings of ambiguous words to test four hypotheses regarding the nature of their comprehension difficulties: semantic deficit, weak central coherence, reduced top-down control and inhibition deficit.
Methods: The cross-modal semantic priming paradigm was used. Children heard homonym primes in isolation or as final words in sentences biased towards the subordinate meaning and then named picture targets depicting dominant or subordinate associates of homonyms.
Results: When homonyms were presented in isolation, children with ASD and controls showed priming for dominant and subordinate pictures at 250ms ISI. At 1,000ms ISI, the controls showed dominant (but not subordinate) priming whilst the ASD group did not show any priming. When homonyms were presented in subordinate sentence contexts, both groups only showed priming for context-appropriate (subordinate) meanings at 250ms ISI, suggesting that context has an early influence on meaning selection. At 1,000ms ISI the controls showed context-appropriate (but not inappropriate) priming whereas the ASD group showed both appropriate and inappropriate priming.
Conclusions: Children with ASD showed intact access to semantic information early in the time course of processing; however, they showed impairments in the selection of semantic representations later in processing. These findings suggest that a difficulty with initiating top-down strategies to modulate online semantic processing may compromise language comprehension in ASD. Implications for intervention are discussed.En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02393.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=141
in Journal of Child Psychology and Psychiatry > 52-9 (September 2011) . - p.964-973[article] Accessing and selecting word meaning in autism spectrum disorder [Texte imprimé et/ou numérique] / Lynnette M. HENDERSON, Auteur ; Paula J. CLARKE, Auteur ; Margaret J. SNOWLING, Auteur . - 2011 . - p.964-973.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 52-9 (September 2011) . - p.964-973
Mots-clés : Language comprehension ambiguity resolution semantic priming homonyms poor comprehenders Index. décimale : PER Périodiques Résumé : Background: Comprehension difficulties are commonly reported in autism spectrum disorder (ASD) but the causes of these difficulties are poorly understood. This study investigates how children with ASD access and select meanings of ambiguous words to test four hypotheses regarding the nature of their comprehension difficulties: semantic deficit, weak central coherence, reduced top-down control and inhibition deficit.
Methods: The cross-modal semantic priming paradigm was used. Children heard homonym primes in isolation or as final words in sentences biased towards the subordinate meaning and then named picture targets depicting dominant or subordinate associates of homonyms.
Results: When homonyms were presented in isolation, children with ASD and controls showed priming for dominant and subordinate pictures at 250ms ISI. At 1,000ms ISI, the controls showed dominant (but not subordinate) priming whilst the ASD group did not show any priming. When homonyms were presented in subordinate sentence contexts, both groups only showed priming for context-appropriate (subordinate) meanings at 250ms ISI, suggesting that context has an early influence on meaning selection. At 1,000ms ISI the controls showed context-appropriate (but not inappropriate) priming whereas the ASD group showed both appropriate and inappropriate priming.
Conclusions: Children with ASD showed intact access to semantic information early in the time course of processing; however, they showed impairments in the selection of semantic representations later in processing. These findings suggest that a difficulty with initiating top-down strategies to modulate online semantic processing may compromise language comprehension in ASD. Implications for intervention are discussed.En ligne : http://dx.doi.org/10.1111/j.1469-7610.2011.02393.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=141 Use of the Screening Tool for Autism in Two-Year-Olds (STAT) for children under 24 months: An exploratory study / Wendy L. STONE in Autism, 12-5 (September 2008)
[article]
Titre : Use of the Screening Tool for Autism in Two-Year-Olds (STAT) for children under 24 months: An exploratory study Type de document : Texte imprimé et/ou numérique Auteurs : Wendy L. STONE, Auteur ; Caitlin R. MCMAHON, Auteur ; Lynnette M. HENDERSON, Auteur Année de publication : 2008 Article en page(s) : p.557-573 Langues : Anglais (eng) Mots-clés : autism early-identification infant sensitivity specificity Index. décimale : PER Périodiques Résumé : The study examined the properties of the Screening Tool for Autism in Two-Year-Olds (STAT) for children under 24 months. The STAT provides a standard context for observing social-communicative behavior in play, imitation, and communication. Seventy-one children received the STAT between 12 and 23 months of age and a follow-up diagnostic evaluation after 24 months. All had an older sibling with an autism spectrum diagnosis (n = 59) or had been referred for evaluation for concerns about autism (n = 12). Signal detection analysis resulted in a cut score of 2.75 for this sample, which yielded a sensitivity of 0.95, specificity of 0.73, positive predictive value of 0.56, and negative predictive value of 0.97. False positives were highest for the 12- to 13-month-old age group; STAT screening properties were improved when the sample was limited to children 14 months and older. Implications for using the STAT with children under 24 months are discussed. En ligne : http://dx.doi.org/10.1177/1362361308096403 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=601
in Autism > 12-5 (September 2008) . - p.557-573[article] Use of the Screening Tool for Autism in Two-Year-Olds (STAT) for children under 24 months: An exploratory study [Texte imprimé et/ou numérique] / Wendy L. STONE, Auteur ; Caitlin R. MCMAHON, Auteur ; Lynnette M. HENDERSON, Auteur . - 2008 . - p.557-573.
Langues : Anglais (eng)
in Autism > 12-5 (September 2008) . - p.557-573
Mots-clés : autism early-identification infant sensitivity specificity Index. décimale : PER Périodiques Résumé : The study examined the properties of the Screening Tool for Autism in Two-Year-Olds (STAT) for children under 24 months. The STAT provides a standard context for observing social-communicative behavior in play, imitation, and communication. Seventy-one children received the STAT between 12 and 23 months of age and a follow-up diagnostic evaluation after 24 months. All had an older sibling with an autism spectrum diagnosis (n = 59) or had been referred for evaluation for concerns about autism (n = 12). Signal detection analysis resulted in a cut score of 2.75 for this sample, which yielded a sensitivity of 0.95, specificity of 0.73, positive predictive value of 0.56, and negative predictive value of 0.97. False positives were highest for the 12- to 13-month-old age group; STAT screening properties were improved when the sample was limited to children 14 months and older. Implications for using the STAT with children under 24 months are discussed. En ligne : http://dx.doi.org/10.1177/1362361308096403 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=601