Disturbed Interplay Between Mid- and High-Level Vision in ASD? Evidence from a Contour Identification Task with Everyday Objects / Kris EVERS in Journal of Autism and Developmental Disorders, 44-4 (April 2014)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 44-4 (April 2014) . - p.801-815 Titre : Disturbed Interplay Between Mid- and High-Level Vision in ASD? Evidence from a Contour Identification Task with Everyday Objects Type de document : Texte imprimé et/ou numérique Auteurs : Kris EVERS, Auteur ; Sven PANIS, Auteur ; Katrien TORFS, Auteur ; Jean STEYAERT, Auteur ; Ilse NOENS, Auteur ; Johan WAGEMANS, Auteur Année de publication : 2014 Article en page(s) : p.801-815 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder (ASD)  Visual perception  Object identification  Weak central coherence theory  Enhanced perceptual functioning hypothesis  Bottom-up versus top-down  Gabor  Local versus global processing Index. décimale : PER Périodiques Résumé : Atypical visual processing in children with autism spectrum disorder (ASD) does not seem to reside in an isolated processing component, such as global or local processing. We therefore developed a paradigm that requires the interaction between different processes—an identification task with Gaborized object outlines—and applied this to two age groups of 6-to-10 and 10-to-14 year old children with and without ASD. Event history analyses demonstrated an identification disadvantage in the ASD group, which remained quite stable during the temporal unfolding of the outline. The typically developing group particularly outperformed the ASD group when more complex contours were shown. Together, our results suggest that the interplay between local and global processes and between bottom-up and top-down processes is disturbed in ASD. En ligne : http://dx.doi.org/10.1007/s10803-013-1931-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=228 [article] Disturbed Interplay Between Mid- and High-Level Vision in ASD? Evidence from a Contour Identification Task with Everyday Objects [Texte imprimé et/ou numérique] / Kris EVERS, Auteur ; Sven PANIS, Auteur ; Katrien TORFS, Auteur ; Jean STEYAERT, Auteur ; Ilse NOENS, Auteur ; Johan WAGEMANS, Auteur . - 2014 . - p.801-815. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 44-4 (April 2014) . - p.801-815 Mots-clés : Autism spectrum disorder (ASD)  Visual perception  Object identification  Weak central coherence theory  Enhanced perceptual functioning hypothesis  Bottom-up versus top-down  Gabor  Local versus global processing Index. décimale : PER Périodiques Résumé : Atypical visual processing in children with autism spectrum disorder (ASD) does not seem to reside in an isolated processing component, such as global or local processing. We therefore developed a paradigm that requires the interaction between different processes—an identification task with Gaborized object outlines—and applied this to two age groups of 6-to-10 and 10-to-14 year old children with and without ASD. Event history analyses demonstrated an identification disadvantage in the ASD group, which remained quite stable during the temporal unfolding of the outline. The typically developing group particularly outperformed the ASD group when more complex contours were shown. Together, our results suggest that the interplay between local and global processes and between bottom-up and top-down processes is disturbed in ASD. En ligne : http://dx.doi.org/10.1007/s10803-013-1931-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=228

Impaired Identification of Impoverished Animate but not Inanimate Objects in Adults With High-Functioning Autism Spectrum Disorder / Hollie G. BURNETT in Autism Research, 8-1 (February 2015)  

Public ISBD [article]  inAutism Research > 8-1 (February 2015) . - p.52-60 Titre : Impaired Identification of Impoverished Animate but not Inanimate Objects in Adults With High-Functioning Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Hollie G. BURNETT, Auteur ; Sven PANIS, Auteur ; Johan WAGEMANS, Auteur ; Tjeerd JELLEMA, Auteur Article en page(s) : p.52-60 Langues : Anglais (eng) Mots-clés : autism spectrum disorder (ASD)  concept forming  Gabor  impoverished objects  animate  inanimate Index. décimale : PER Périodiques Résumé : The ability to identify animate and inanimate objects from impoverished images was investigated in adults with high-functioning autism spectrum disorder (HFA) and in matched typically developed (TD) adults, using a newly developed task. Consecutive frames were presented containing Gabor elements that slightly changed orientation from one frame to the next. For a subset of elements, the changes were such that these elements gradually formed the outline of an object. Elements enclosed within the object's outline gradually adopted one and the same orientation, outside elements adopted random orientations. The subjective experience was that of an object appearing out of a fog. The HFA group required significantly more frames to identify the impoverished objects than the TD group. Crucially, this difference depended on the nature of the objects: the HFA group required significantly more frames to identify animate objects, but with respect to the identification of inanimate objects the groups did not differ. The groups also did not differ with respect to the number and type of incorrect guesses they made. The results suggest a specific impairment in individuals with HFA in identifying animate objects. A number of possible explanations are discussed. Autism Res 2015, 8: 52–60. En ligne : http://dx.doi.org/10.1002/aur.1412 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=256 [article] Impaired Identification of Impoverished Animate but not Inanimate Objects in Adults With High-Functioning Autism Spectrum Disorder [Texte imprimé et/ou numérique] / Hollie G. BURNETT, Auteur ; Sven PANIS, Auteur ; Johan WAGEMANS, Auteur ; Tjeerd JELLEMA, Auteur . - p.52-60. Langues : Anglais (eng) in Autism Research > 8-1 (February 2015) . - p.52-60 Mots-clés : autism spectrum disorder (ASD)  concept forming  Gabor  impoverished objects  animate  inanimate Index. décimale : PER Périodiques Résumé : The ability to identify animate and inanimate objects from impoverished images was investigated in adults with high-functioning autism spectrum disorder (HFA) and in matched typically developed (TD) adults, using a newly developed task. Consecutive frames were presented containing Gabor elements that slightly changed orientation from one frame to the next. For a subset of elements, the changes were such that these elements gradually formed the outline of an object. Elements enclosed within the object's outline gradually adopted one and the same orientation, outside elements adopted random orientations. The subjective experience was that of an object appearing out of a fog. The HFA group required significantly more frames to identify the impoverished objects than the TD group. Crucially, this difference depended on the nature of the objects: the HFA group required significantly more frames to identify animate objects, but with respect to the identification of inanimate objects the groups did not differ. The groups also did not differ with respect to the number and type of incorrect guesses they made. The results suggest a specific impairment in individuals with HFA in identifying animate objects. A number of possible explanations are discussed. Autism Res 2015, 8: 52–60. En ligne : http://dx.doi.org/10.1002/aur.1412 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=256

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