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Processing Slow and Fast Motion in Children With Autism Spectrum Conditions / Catherine MANNING in Autism Research, 6-6 (December 2013)
[article]
Titre : Processing Slow and Fast Motion in Children With Autism Spectrum Conditions Type de document : Texte imprimé et/ou numérique Auteurs : Catherine MANNING, Auteur ; Tony CHARMAN, Auteur ; Elizabeth PELLICANO, Auteur Année de publication : 2013 Article en page(s) : p.531-541 Langues : Anglais (eng) Mots-clés : autism speed discrimination motion coherence visual motion processing Index. décimale : PER Périodiques Résumé : Consistent with the dorsal stream hypothesis, difficulties processing dynamic information have previously been reported in individuals with autism spectrum conditions (ASC). However, no research has systematically compared motion processing abilities for slow and fast speeds. Here, we measured speed discrimination thresholds and motion coherence thresholds in slow (1.5?deg/sec) and fast (6?deg/sec) speed conditions in children with an ASC aged 7 to 14 years, and age- and ability-matched typically developing children. Unexpectedly, children with ASC were as sensitive as typically developing children to differences in speed at both slow and fast reference speeds. Yet, elevated motion coherence thresholds were found in children with ASC, but in the slow stimulus speed condition only. Rather than having pervasive difficulties in motion processing, as predicted by the dorsal stream hypothesis, these results suggest that children with ASC have a selective difficulty in extracting coherent motion information specifically at slow speeds. Understanding the effects of stimulus parameters such as stimulus speed will be important for resolving discrepancies between previous studies examining motion coherence thresholds in ASC and also for refining theoretical models of altered autistic perception. En ligne : http://dx.doi.org/10.1002/aur.1309 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=221
in Autism Research > 6-6 (December 2013) . - p.531-541[article] Processing Slow and Fast Motion in Children With Autism Spectrum Conditions [Texte imprimé et/ou numérique] / Catherine MANNING, Auteur ; Tony CHARMAN, Auteur ; Elizabeth PELLICANO, Auteur . - 2013 . - p.531-541.
Langues : Anglais (eng)
in Autism Research > 6-6 (December 2013) . - p.531-541
Mots-clés : autism speed discrimination motion coherence visual motion processing Index. décimale : PER Périodiques Résumé : Consistent with the dorsal stream hypothesis, difficulties processing dynamic information have previously been reported in individuals with autism spectrum conditions (ASC). However, no research has systematically compared motion processing abilities for slow and fast speeds. Here, we measured speed discrimination thresholds and motion coherence thresholds in slow (1.5?deg/sec) and fast (6?deg/sec) speed conditions in children with an ASC aged 7 to 14 years, and age- and ability-matched typically developing children. Unexpectedly, children with ASC were as sensitive as typically developing children to differences in speed at both slow and fast reference speeds. Yet, elevated motion coherence thresholds were found in children with ASC, but in the slow stimulus speed condition only. Rather than having pervasive difficulties in motion processing, as predicted by the dorsal stream hypothesis, these results suggest that children with ASC have a selective difficulty in extracting coherent motion information specifically at slow speeds. Understanding the effects of stimulus parameters such as stimulus speed will be important for resolving discrepancies between previous studies examining motion coherence thresholds in ASC and also for refining theoretical models of altered autistic perception. En ligne : http://dx.doi.org/10.1002/aur.1309 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=221