Holistic processing of faces as measured by the Thatcher illusion is intact in autism spectrum disorders / Laura CLEARY in Autism, 19-4 (May 2015)  

Public ISBD [article]  inAutism > 19-4 (May 2015) . - p.451-458 Titre : Holistic processing of faces as measured by the Thatcher illusion is intact in autism spectrum disorders Type de document : Texte imprimé et/ou numérique Auteurs : Laura CLEARY, Auteur ; Nuala BRADY, Auteur ; Michael FITZGERALD, Auteur ; Louise GALLAGHER, Auteur Article en page(s) : p.451-458 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Impaired face perception in autism spectrum disorders is thought to reflect a perceptual style characterized by componential rather than configural processing of faces. This study investigated face processing in adolescents with autism spectrum disorders using the Thatcher illusion, a perceptual phenomenon exhibiting ‘inversion effects’ that characterize typical face processing. While previous studies used a limited range of face orientations, we measured perception of normality/grotesqueness of faces at seven orientations ranging from upright to inverted to allow for a detailed comparison of both reaction time and error by orientation profiles. We found that, like their typically developing peers, adolescents with autism spectrum disorders show strong inversion effects whereby reaction times were longer and error rates greater at inverted when compared to upright orientations. Additionally, the adolescents with autism spectrum disorders, like their peers in the typically developing group, show a marked nonlinearity in the error by orientation profile. Error is roughly constant out to 90° and then increases steeply, indicating a sudden shift from configural to local processing that reflects experience with faces in their typical orientations. These findings agree with recent reports that face perception is qualitatively similar in autistic and neurotypical groups. En ligne : http://dx.doi.org/10.1177/1362361314526005 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=257 [article] Holistic processing of faces as measured by the Thatcher illusion is intact in autism spectrum disorders [Texte imprimé et/ou numérique] / Laura CLEARY, Auteur ; Nuala BRADY, Auteur ; Michael FITZGERALD, Auteur ; Louise GALLAGHER, Auteur . - p.451-458. Langues : Anglais (eng) in Autism > 19-4 (May 2015) . - p.451-458 Index. décimale : PER Périodiques Résumé : Impaired face perception in autism spectrum disorders is thought to reflect a perceptual style characterized by componential rather than configural processing of faces. This study investigated face processing in adolescents with autism spectrum disorders using the Thatcher illusion, a perceptual phenomenon exhibiting ‘inversion effects’ that characterize typical face processing. While previous studies used a limited range of face orientations, we measured perception of normality/grotesqueness of faces at seven orientations ranging from upright to inverted to allow for a detailed comparison of both reaction time and error by orientation profiles. We found that, like their typically developing peers, adolescents with autism spectrum disorders show strong inversion effects whereby reaction times were longer and error rates greater at inverted when compared to upright orientations. Additionally, the adolescents with autism spectrum disorders, like their peers in the typically developing group, show a marked nonlinearity in the error by orientation profile. Error is roughly constant out to 90° and then increases steeply, indicating a sudden shift from configural to local processing that reflects experience with faces in their typical orientations. These findings agree with recent reports that face perception is qualitatively similar in autistic and neurotypical groups. En ligne : http://dx.doi.org/10.1177/1362361314526005 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=257

Inversion effects in the perception of the moving human form: A comparison of adolescents with autism spectrum disorder and typically developing adolescents / Laura CLEARY in Autism, 18-8 (November 2014)  

Public ISBD [article]  inAutism > 18-8 (November 2014) . - p.943-952 Titre : Inversion effects in the perception of the moving human form: A comparison of adolescents with autism spectrum disorder and typically developing adolescents Type de document : Texte imprimé et/ou numérique Auteurs : Laura CLEARY, Auteur ; Kathy LOONEY, Auteur ; Nuala BRADY, Auteur ; Michael FITZGERALD, Auteur Article en page(s) : p.943-952 Langues : Anglais (eng) Mots-clés : autism spectrum disorders  biological motion perception  body inversion effect  configural processing Index. décimale : PER Périodiques Résumé : The “body inversion effect” refers to superior recognition of upright than inverted images of the human body and indicates typical configural processing. Previous research by Reed et al. using static images of the human body shows that people with autism fail to demonstrate this effect. Using a novel task in which adults, adolescents with autism, and typically developing adolescents judged whether walking stick figures—created from biological motion recordings and shown at seven orientations between 0° and 180°—were normal or distorted, this study shows clear effects of stimulus inversion. Reaction times and “inverse efficiency” increased with orientation for normal but not distorted walkers, and sensitivity declined with rotation from upright for all groups. Notably, the effect of stimulus inversion was equally detrimental to both groups of adolescents suggesting intact configural processing of the body in motion in autism spectrum disorder. En ligne : http://dx.doi.org/10.1177/1362361313499455 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=242 [article] Inversion effects in the perception of the moving human form: A comparison of adolescents with autism spectrum disorder and typically developing adolescents [Texte imprimé et/ou numérique] / Laura CLEARY, Auteur ; Kathy LOONEY, Auteur ; Nuala BRADY, Auteur ; Michael FITZGERALD, Auteur . - p.943-952. Langues : Anglais (eng) in Autism > 18-8 (November 2014) . - p.943-952 Mots-clés : autism spectrum disorders  biological motion perception  body inversion effect  configural processing Index. décimale : PER Périodiques Résumé : The “body inversion effect” refers to superior recognition of upright than inverted images of the human body and indicates typical configural processing. Previous research by Reed et al. using static images of the human body shows that people with autism fail to demonstrate this effect. Using a novel task in which adults, adolescents with autism, and typically developing adolescents judged whether walking stick figures—created from biological motion recordings and shown at seven orientations between 0° and 180°—were normal or distorted, this study shows clear effects of stimulus inversion. Reaction times and “inverse efficiency” increased with orientation for normal but not distorted walkers, and sensitivity declined with rotation from upright for all groups. Notably, the effect of stimulus inversion was equally detrimental to both groups of adolescents suggesting intact configural processing of the body in motion in autism spectrum disorder. En ligne : http://dx.doi.org/10.1177/1362361313499455 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=242

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