5 recherche sur le mot-clé 'Vision research'

Ultra-Rapid Categorization of Meaningful Real-Life Scenes in Adults With and Without ASD / Steven VANMARCKE in Journal of Autism and Developmental Disorders, 46-2 (February 2016)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 46-2 (February 2016) . - p.450-466 Titre : Ultra-Rapid Categorization of Meaningful Real-Life Scenes in Adults With and Without ASD Type de document : Texte imprimé et/ou numérique Auteurs : Steven VANMARCKE, Auteur ; Ruth HALLEN, Auteur ; Kris EVERS, Auteur ; Ilse NOENS, Auteur ; Jean STEYAERT, Auteur ; Johan WAGEMANS, Auteur Année de publication : 2016 Article en page(s) : p.450-466 Langues : Anglais (eng) Mots-clés : Catégorisation  Autism spectrum disorder  Vision research  Ultra-rapid categorization  Theory of mind  Reverse hierarchy theory Index. décimale : PER Périodiques Résumé : In comparison to typically developing (TD) individuals, people with autism spectrum disorder (ASD) appear to be worse in the fast extraction of the global meaning of a situation or picture. Ultra-rapid categorization [paradigm developed by Thorpe et al. (Nature 381:520–522, 1996)] involves such global information processing. We therefore tested a group of adults with and without ASD, without intellectual disability, on a set of ultra-rapid categorization tasks. Individuals with ASD performed equally well as TD individuals except when the task required the categorization of social interactions. These results argue against a general deficit in ultra-rapid gist perception in people with ASD, while suggesting a more specific problem with the fast processing of information about social relations. En ligne : http://dx.doi.org/10.1007/s10803-015-2583-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=280 [article] Ultra-Rapid Categorization of Meaningful Real-Life Scenes in Adults With and Without ASD [Texte imprimé et/ou numérique] / Steven VANMARCKE, Auteur ; Ruth HALLEN, Auteur ; Kris EVERS, Auteur ; Ilse NOENS, Auteur ; Jean STEYAERT, Auteur ; Johan WAGEMANS, Auteur . - 2016 . - p.450-466. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 46-2 (February 2016) . - p.450-466 Mots-clés : Catégorisation  Autism spectrum disorder  Vision research  Ultra-rapid categorization  Theory of mind  Reverse hierarchy theory Index. décimale : PER Périodiques Résumé : In comparison to typically developing (TD) individuals, people with autism spectrum disorder (ASD) appear to be worse in the fast extraction of the global meaning of a situation or picture. Ultra-rapid categorization [paradigm developed by Thorpe et al. (Nature 381:520–522, 1996)] involves such global information processing. We therefore tested a group of adults with and without ASD, without intellectual disability, on a set of ultra-rapid categorization tasks. Individuals with ASD performed equally well as TD individuals except when the task required the categorization of social interactions. These results argue against a general deficit in ultra-rapid gist perception in people with ASD, while suggesting a more specific problem with the fast processing of information about social relations. En ligne : http://dx.doi.org/10.1007/s10803-015-2583-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=280

Change detection of meaningful objects in real-world scenes in adolescents with and without autism spectrum disorder / S. VANMARCKE in Autism, 22-6 (August 2018)  

Public ISBD [article]  inAutism > 22-6 (August 2018) . - p.728-739 Titre : Change detection of meaningful objects in real-world scenes in adolescents with and without autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : S. VANMARCKE, Auteur ; I. NOENS, Auteur ; J. STEYAERT, Auteur ; J. WAGEMANS, Auteur Article en page(s) : p.728-739 Langues : Anglais (eng) Mots-clés : autism spectrum disorders  change blindness  local-global processing  vision research Index. décimale : PER Périodiques Résumé : Previous research suggested that adolescents with autism spectrum disorder are better than typically developing children in detecting local, non-social details within complex visual scenes. To better understand these differences, we used the image database by Sareen et al., containing the size and on-screen location information of all changes in the images, in a change blindness paradigm. In this task, an original and a modified real-world scene, separated by a gray blank, alternate repeatedly until observers detect the change. Our results indicated that participants with and without autism spectrum disorder performed similarly when scenes were presented upright, but that only the performance of the typically developing adolescents became worse in the inverted scene condition. In this condition, the correlation between performance and both image difficulty and change predictability was significantly weaker in autism spectrum disorder than in typically developing participants. We suggest that these findings result from a more locally biased search strategy in people with autism spectrum disorder, compared to typically developing participants, in tasks in which the rapid processing of global information does not help to improve change detection performance. Finally, although we found change location, change size, and age to influence participant performance, none of these was directly linked to the observed group-level differences. En ligne : http://dx.doi.org/10.1177/1362361317702559 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=366 [article] Change detection of meaningful objects in real-world scenes in adolescents with and without autism spectrum disorder [Texte imprimé et/ou numérique] / S. VANMARCKE, Auteur ; I. NOENS, Auteur ; J. STEYAERT, Auteur ; J. WAGEMANS, Auteur . - p.728-739. Langues : Anglais (eng) in Autism > 22-6 (August 2018) . - p.728-739 Mots-clés : autism spectrum disorders  change blindness  local-global processing  vision research Index. décimale : PER Périodiques Résumé : Previous research suggested that adolescents with autism spectrum disorder are better than typically developing children in detecting local, non-social details within complex visual scenes. To better understand these differences, we used the image database by Sareen et al., containing the size and on-screen location information of all changes in the images, in a change blindness paradigm. In this task, an original and a modified real-world scene, separated by a gray blank, alternate repeatedly until observers detect the change. Our results indicated that participants with and without autism spectrum disorder performed similarly when scenes were presented upright, but that only the performance of the typically developing adolescents became worse in the inverted scene condition. In this condition, the correlation between performance and both image difficulty and change predictability was significantly weaker in autism spectrum disorder than in typically developing participants. We suggest that these findings result from a more locally biased search strategy in people with autism spectrum disorder, compared to typically developing participants, in tasks in which the rapid processing of global information does not help to improve change detection performance. Finally, although we found change location, change size, and age to influence participant performance, none of these was directly linked to the observed group-level differences. En ligne : http://dx.doi.org/10.1177/1362361317702559 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=366

Gist perception in adolescents with and without ASD: Ultra-rapid categorization of meaningful real-life scenes / Steven VANMARCKE in Research in Autism Spectrum Disorders, 29-30 (September–October 2016)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 29-30 (September–October 2016) . - p.30-47 Titre : Gist perception in adolescents with and without ASD: Ultra-rapid categorization of meaningful real-life scenes Type de document : Texte imprimé et/ou numérique Auteurs : Steven VANMARCKE, Auteur ; Lotte VAN ESCH, Auteur ; Ruth VAN DER HALLEN, Auteur ; Kris EVERS, Auteur ; Ilse NOENS, Auteur ; Jean STEYAERT, Auteur ; Johan WAGEMANS, Auteur Article en page(s) : p.30-47 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Vision research  Ultra-rapid categorization  Theory of mind  Reverse hierarchy theory  Developmental effects Index. décimale : PER Périodiques Résumé : Abstract Previous research has suggested the presence of a reduced preference to report and spontaneously interpret the global properties of a scene picture in adults with Autism Spectrum Disorder (ASD). Contrary to what is seen in typically developing (TD) participants, gist perception in ASD seems to occur mostly in a more explicit manner with focused attention. The current study used a set of non-social and social ultra-rapid categorization tasks to investigate gist perception in adolescents with and without ASD. When we instructed the participants to rapidly identify briefly presented object or scene information, we found that adolescents with ASD performed worse than TD participants. These findings complemented our previous study on ultra-rapid categorization in adults with or without ASD, in which no group-level differences in gist perception were observed. When categorization specifically entailed the fast processing of socially salient information, both adolescents and adults with ASD performed worse than TD participants. The combination of these results suggests an age-dependent improvement in general categorization ability but more long-lasting difficulties in rapid social categorization in individuals with ASD. We suggest that the poorer general performance of adolescents with ASD results from a less efficient rapid processing of global semantic structure. En ligne : http://dx.doi.org/10.1016/j.rasd.2016.05.007 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=292 [article] Gist perception in adolescents with and without ASD: Ultra-rapid categorization of meaningful real-life scenes [Texte imprimé et/ou numérique] / Steven VANMARCKE, Auteur ; Lotte VAN ESCH, Auteur ; Ruth VAN DER HALLEN, Auteur ; Kris EVERS, Auteur ; Ilse NOENS, Auteur ; Jean STEYAERT, Auteur ; Johan WAGEMANS, Auteur . - p.30-47. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 29-30 (September–October 2016) . - p.30-47 Mots-clés : Autism spectrum disorder  Vision research  Ultra-rapid categorization  Theory of mind  Reverse hierarchy theory  Developmental effects Index. décimale : PER Périodiques Résumé : Abstract Previous research has suggested the presence of a reduced preference to report and spontaneously interpret the global properties of a scene picture in adults with Autism Spectrum Disorder (ASD). Contrary to what is seen in typically developing (TD) participants, gist perception in ASD seems to occur mostly in a more explicit manner with focused attention. The current study used a set of non-social and social ultra-rapid categorization tasks to investigate gist perception in adolescents with and without ASD. When we instructed the participants to rapidly identify briefly presented object or scene information, we found that adolescents with ASD performed worse than TD participants. These findings complemented our previous study on ultra-rapid categorization in adults with or without ASD, in which no group-level differences in gist perception were observed. When categorization specifically entailed the fast processing of socially salient information, both adolescents and adults with ASD performed worse than TD participants. The combination of these results suggests an age-dependent improvement in general categorization ability but more long-lasting difficulties in rapid social categorization in individuals with ASD. We suggest that the poorer general performance of adolescents with ASD results from a less efficient rapid processing of global semantic structure. En ligne : http://dx.doi.org/10.1016/j.rasd.2016.05.007 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=292

Multiple Object Tracking Reveals Object-Based Grouping Interference in Children with ASD / R. VAN DER HALLEN in Journal of Autism and Developmental Disorders, 48-4 (April 2018)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 48-4 (April 2018) . - p.1341-1349 Titre : Multiple Object Tracking Reveals Object-Based Grouping Interference in Children with ASD Type de document : Texte imprimé et/ou numérique Auteurs : R. VAN DER HALLEN, Auteur ; K. EVERS, Auteur ; L. DE-WIT, Auteur ; J. STEYAERT, Auteur ; I. NOENS, Auteur ; J. WAGEMANS, Auteur Article en page(s) : p.1341-1349 Langues : Anglais (eng) Mots-clés : Attention  Autism spectrum disorder (ASD)  Grouping  Interference  Multiple object tracking (MOT)  Vision research Index. décimale : PER Périodiques Résumé : The multiple object tracking (MOT) paradigm has proven its value in targeting a number of aspects of visual cognition. This study used MOT to investigate the effect of object-based grouping, both in children with and without autism spectrum disorder (ASD). A modified MOT task was administered to both groups, who had to track and distinguish four targets that moved randomly amongst four distracters, irrespective of the grouping condition. No group difference was revealed between children with and without ASD: both showed adequate MOT abilities and a similar amount of grouping interference. Implications of the current result are considered for previous MOT studies, the developmental trajectory of perceptual grouping, and the idea of heightened sensitivity to task characteristics in ASD. En ligne : http://dx.doi.org/10.1007/s10803-015-2463-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=352 [article] Multiple Object Tracking Reveals Object-Based Grouping Interference in Children with ASD [Texte imprimé et/ou numérique] / R. VAN DER HALLEN, Auteur ; K. EVERS, Auteur ; L. DE-WIT, Auteur ; J. STEYAERT, Auteur ; I. NOENS, Auteur ; J. WAGEMANS, Auteur . - p.1341-1349. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 48-4 (April 2018) . - p.1341-1349 Mots-clés : Attention  Autism spectrum disorder (ASD)  Grouping  Interference  Multiple object tracking (MOT)  Vision research Index. décimale : PER Périodiques Résumé : The multiple object tracking (MOT) paradigm has proven its value in targeting a number of aspects of visual cognition. This study used MOT to investigate the effect of object-based grouping, both in children with and without autism spectrum disorder (ASD). A modified MOT task was administered to both groups, who had to track and distinguish four targets that moved randomly amongst four distracters, irrespective of the grouping condition. No group difference was revealed between children with and without ASD: both showed adequate MOT abilities and a similar amount of grouping interference. Implications of the current result are considered for previous MOT studies, the developmental trajectory of perceptual grouping, and the idea of heightened sensitivity to task characteristics in ASD. En ligne : http://dx.doi.org/10.1007/s10803-015-2463-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=352

Priming Facial Gender and Emotional Valence: The Influence of Spatial Frequency on Face Perception in ASD / Steven VANMARCKE in Journal of Autism and Developmental Disorders, 47-4 (April 2017)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 47-4 (April 2017) . - p.927-946 Titre : Priming Facial Gender and Emotional Valence: The Influence of Spatial Frequency on Face Perception in ASD Type de document : Texte imprimé et/ou numérique Auteurs : Steven VANMARCKE, Auteur ; Johan WAGEMANS, Auteur Article en page(s) : p.927-946 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Face perception  Vision research  Spatial frequency Index. décimale : PER Périodiques Résumé : Adolescents with and without autism spectrum disorder (ASD) performed two priming experiments in which they implicitly processed a prime stimulus, containing high and/or low spatial frequency information, and then explicitly categorized a target face either as male/female (gender task) or as positive/negative (Valence task). Adolescents with ASD made more categorization errors than typically developing adolescents. They also showed an age-dependent improvement in categorization speed and had more difficulties with categorizing facial expressions than gender. However, in neither of the categorization tasks, we found group differences in the processing of coarse versus fine prime information. This contradicted our expectations, and indicated that the perceptual differences between adolescents with and without ASD critically depended on the processing time available for the primes. En ligne : http://dx.doi.org/10.1007/s10803-016-3017-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304 [article] Priming Facial Gender and Emotional Valence: The Influence of Spatial Frequency on Face Perception in ASD [Texte imprimé et/ou numérique] / Steven VANMARCKE, Auteur ; Johan WAGEMANS, Auteur . - p.927-946. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 47-4 (April 2017) . - p.927-946 Mots-clés : Autism spectrum disorder  Face perception  Vision research  Spatial frequency Index. décimale : PER Périodiques Résumé : Adolescents with and without autism spectrum disorder (ASD) performed two priming experiments in which they implicitly processed a prime stimulus, containing high and/or low spatial frequency information, and then explicitly categorized a target face either as male/female (gender task) or as positive/negative (Valence task). Adolescents with ASD made more categorization errors than typically developing adolescents. They also showed an age-dependent improvement in categorization speed and had more difficulties with categorizing facial expressions than gender. However, in neither of the categorization tasks, we found group differences in the processing of coarse versus fine prime information. This contradicted our expectations, and indicated that the perceptual differences between adolescents with and without ASD critically depended on the processing time available for the primes. En ligne : http://dx.doi.org/10.1007/s10803-016-3017-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304