Brief Report: Visuospatial Analysis and Self-Rated Autistic-Like Traits / Emma J. GRINTER in Journal of Autism and Developmental Disorders, 39-4 (April 2009)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 39-4 (April 2009) . - p.670-677 Titre : Brief Report: Visuospatial Analysis and Self-Rated Autistic-Like Traits Type de document : Texte imprimé et/ou numérique Auteurs : Emma J. GRINTER, Auteur ; Murray T. MAYBERY, Auteur ; Pia L. VAN BEEK, Auteur ; David R. BADCOCK, Auteur Année de publication : 2009 Article en page(s) : p.670-677 Langues : Anglais (eng) Mots-clés : Autism Autistic-like-traits Embedded-figures-task Visuospatial-analysis Weak-central-coherence Index. décimale : PER Périodiques Résumé : Although there is good evidence that the behavioral traits of autism extend in lesser form to the general population, there has been limited investigation of whether cognitive features of the disorder also accompany these milder traits. This study investigated whether the superiority in visuospatial analysis established for individuals with autism also extends to individuals in the general population who self-report autistic-like traits. In an initial study, students scoring high on the Autism-spectrum Quotient (AQ) were faster and more accurate on the Embedded Figures Test (EFT) and the Block Design subscale of the Wechsler Intelligence Scale III compared to those scoring low on the AQ. A second study showed that high AQ scorers were faster to complete the EFT compared to low AQ scorers irrespective of IQ. Results are discussed with reference to weak central coherence theory and the autism spectrum. En ligne : http://dx.doi.org/10.1007/s10803-008-0658-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=707 [article] Brief Report: Visuospatial Analysis and Self-Rated Autistic-Like Traits [Texte imprimé et/ou numérique] / Emma J. GRINTER, Auteur ; Murray T. MAYBERY, Auteur ; Pia L. VAN BEEK, Auteur ; David R. BADCOCK, Auteur . - 2009 . - p.670-677. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 39-4 (April 2009) . - p.670-677 Mots-clés : Autism Autistic-like-traits Embedded-figures-task Visuospatial-analysis Weak-central-coherence Index. décimale : PER Périodiques Résumé : Although there is good evidence that the behavioral traits of autism extend in lesser form to the general population, there has been limited investigation of whether cognitive features of the disorder also accompany these milder traits. This study investigated whether the superiority in visuospatial analysis established for individuals with autism also extends to individuals in the general population who self-report autistic-like traits. In an initial study, students scoring high on the Autism-spectrum Quotient (AQ) were faster and more accurate on the Embedded Figures Test (EFT) and the Block Design subscale of the Wechsler Intelligence Scale III compared to those scoring low on the AQ. A second study showed that high AQ scorers were faster to complete the EFT compared to low AQ scorers irrespective of IQ. Results are discussed with reference to weak central coherence theory and the autism spectrum. En ligne : http://dx.doi.org/10.1007/s10803-008-0658-3 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=707

Global Visual Processing and Self-Rated Autistic-like Traits / Emma J. GRINTER in Journal of Autism and Developmental Disorders, 39-9 (September 2009)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 39-9 (September 2009) . - p.1278-1290 Titre : Global Visual Processing and Self-Rated Autistic-like Traits Type de document : Texte imprimé et/ou numérique Auteurs : Emma J. GRINTER, Auteur ; Murray T. MAYBERY, Auteur ; Pia L. VAN BEEK, Auteur ; David R. BADCOCK, Auteur ; Elizabeth PELLICANO, Auteur ; Johanna C. BADCOCK, Auteur Année de publication : 2009 Article en page(s) : p.1278-1290 Langues : Anglais (eng) Mots-clés : Autistic-like-traits Autism-Visual-perception Dorsal-pathway Ventral-pathway Weak-Central-Coherence Index. décimale : PER Périodiques Résumé : The current research investigated, firstly, whether individuals with high levels of mild autistic-like traits display a similar profile of embedded figures test (EFT) and global motion performance to that seen in autism. Secondly, whether differences in EFT performance are related to enhanced local processing or reduced global processing in the ventral visual stream was also examined. Results indicated that people who scored high on the Autism-spectrum Quotient (AQ) were faster to identify embedded figures, and had poorer global motion and global form thresholds than low AQ scorers. However, the two groups did not differ on a task assessing lower-level input to the ventral stream. Overall the results indicate that individuals with high levels of autistic-like traits have difficulties with global integration in the visual pathways, which may at least partly explain their superior EFT performance. En ligne : http://dx.doi.org/10.1007/s10803-009-0740-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=814 [article] Global Visual Processing and Self-Rated Autistic-like Traits [Texte imprimé et/ou numérique] / Emma J. GRINTER, Auteur ; Murray T. MAYBERY, Auteur ; Pia L. VAN BEEK, Auteur ; David R. BADCOCK, Auteur ; Elizabeth PELLICANO, Auteur ; Johanna C. BADCOCK, Auteur . - 2009 . - p.1278-1290. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 39-9 (September 2009) . - p.1278-1290 Mots-clés : Autistic-like-traits Autism-Visual-perception Dorsal-pathway Ventral-pathway Weak-Central-Coherence Index. décimale : PER Périodiques Résumé : The current research investigated, firstly, whether individuals with high levels of mild autistic-like traits display a similar profile of embedded figures test (EFT) and global motion performance to that seen in autism. Secondly, whether differences in EFT performance are related to enhanced local processing or reduced global processing in the ventral visual stream was also examined. Results indicated that people who scored high on the Autism-spectrum Quotient (AQ) were faster to identify embedded figures, and had poorer global motion and global form thresholds than low AQ scorers. However, the two groups did not differ on a task assessing lower-level input to the ventral stream. Overall the results indicate that individuals with high levels of autistic-like traits have difficulties with global integration in the visual pathways, which may at least partly explain their superior EFT performance. En ligne : http://dx.doi.org/10.1007/s10803-009-0740-5 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=814

Perception of shapes targeting local and global processes in autism spectrum disorders / Emma J. GRINTER in Journal of Child Psychology and Psychiatry, 51-6 (June 2010)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 51-6 (June 2010) . - p.717-724 Titre : Perception of shapes targeting local and global processes in autism spectrum disorders Type de document : Texte imprimé et/ou numérique Auteurs : Emma J. GRINTER, Auteur ; Murray T. MAYBERY, Auteur ; David R. BADCOCK, Auteur ; Elizabeth PELLICANO, Auteur ; Johanna C. BADCOCK, Auteur Année de publication : 2010 Article en page(s) : p.717-724 Langues : Anglais (eng) Mots-clés : Autism local-processing global-processing ventral-visual-pathway radial-frequency-patterns Index. décimale : PER Périodiques Résumé : Background: Several researchers have found evidence for impaired global processing in the dorsal visual stream in individuals with autism spectrum disorders (ASDs). However, support for a similar pattern of visual processing in the ventral visual stream is less consistent. Critical to resolving the inconsistency is the assessment of local and global form processing ability. Methods: Within the visual domain, radial frequency (RF) patterns – shapes formed by sinusoidally varying the radius of a circle to add 'bumps' of a certain number to a circle – can be used to examine local and global form perception. Typically developing children and children with an ASD discriminated between circles and RF patterns that are processed either locally (RF24) or globally (RF3). Results: Children with an ASD required greater shape deformation to identify RF3 shapes compared to typically developing children, consistent with difficulty in global processing in the ventral stream. No group difference was observed for RF24 shapes, suggesting intact local ventral-stream processing. Conclusions: These outcomes support the position that a deficit in global visual processing is present in ASDs, consistent with the notion of Weak Central Coherence. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2009.02203.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=101 [article] Perception of shapes targeting local and global processes in autism spectrum disorders [Texte imprimé et/ou numérique] / Emma J. GRINTER, Auteur ; Murray T. MAYBERY, Auteur ; David R. BADCOCK, Auteur ; Elizabeth PELLICANO, Auteur ; Johanna C. BADCOCK, Auteur . - 2010 . - p.717-724. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 51-6 (June 2010) . - p.717-724 Mots-clés : Autism local-processing global-processing ventral-visual-pathway radial-frequency-patterns Index. décimale : PER Périodiques Résumé : Background: Several researchers have found evidence for impaired global processing in the dorsal visual stream in individuals with autism spectrum disorders (ASDs). However, support for a similar pattern of visual processing in the ventral visual stream is less consistent. Critical to resolving the inconsistency is the assessment of local and global form processing ability. Methods: Within the visual domain, radial frequency (RF) patterns – shapes formed by sinusoidally varying the radius of a circle to add 'bumps' of a certain number to a circle – can be used to examine local and global form perception. Typically developing children and children with an ASD discriminated between circles and RF patterns that are processed either locally (RF24) or globally (RF3). Results: Children with an ASD required greater shape deformation to identify RF3 shapes compared to typically developing children, consistent with difficulty in global processing in the ventral stream. No group difference was observed for RF24 shapes, suggesting intact local ventral-stream processing. Conclusions: These outcomes support the position that a deficit in global visual processing is present in ASDs, consistent with the notion of Weak Central Coherence. En ligne : http://dx.doi.org/10.1111/j.1469-7610.2009.02203.x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=101

Visual Search Targeting Either Local or Global Perceptual Processes Differs as a Function of Autistic-Like Traits in the Typically Developing Population / Renita A. ALMEIDA in Journal of Autism and Developmental Disorders, 43-6 (June 2013)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 43-6 (June 2013) . - p.1272-1286 Titre : Visual Search Targeting Either Local or Global Perceptual Processes Differs as a Function of Autistic-Like Traits in the Typically Developing Population Type de document : Texte imprimé et/ou numérique Auteurs : Renita A. ALMEIDA, Auteur ; J. Edwin DICKINSON, Auteur ; Murray T. MAYBERY, Auteur ; Johanna C. BADCOCK, Auteur ; David R. BADCOCK, Auteur Article en page(s) : p.1272-1286 Langues : Anglais (eng) Mots-clés : Autism-Spectrum Quotient  Visual search  Embedded Figures Test  Radial frequency patterns  Visual processing Index. décimale : PER Périodiques Résumé : Relative to low scorers, high scorers on the Autism-Spectrum Quotient (AQ) show enhanced performance on the Embedded Figures Test and the Radial Frequency search task (RFST), which has been attributed to both enhanced local processing and differences in combining global percepts. We investigate the role of local and global processing further using the RFST in four experiments. High AQ adults maintained a consistent advantage in search speed across diverse target-distracter stimulus conditions. This advantage may reflect enhanced local processing of curvature in early stages of the form vision pathway and superior global detection of shape primitives. However, more probable is the presence of a superior search process that enables a consistent search advantage at both levels of processing. En ligne : http://dx.doi.org/10.1007/s10803-012-1669-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=201 [article] Visual Search Targeting Either Local or Global Perceptual Processes Differs as a Function of Autistic-Like Traits in the Typically Developing Population [Texte imprimé et/ou numérique] / Renita A. ALMEIDA, Auteur ; J. Edwin DICKINSON, Auteur ; Murray T. MAYBERY, Auteur ; Johanna C. BADCOCK, Auteur ; David R. BADCOCK, Auteur . - p.1272-1286. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 43-6 (June 2013) . - p.1272-1286 Mots-clés : Autism-Spectrum Quotient  Visual search  Embedded Figures Test  Radial frequency patterns  Visual processing Index. décimale : PER Périodiques Résumé : Relative to low scorers, high scorers on the Autism-Spectrum Quotient (AQ) show enhanced performance on the Embedded Figures Test and the Radial Frequency search task (RFST), which has been attributed to both enhanced local processing and differences in combining global percepts. We investigate the role of local and global processing further using the RFST in four experiments. High AQ adults maintained a consistent advantage in search speed across diverse target-distracter stimulus conditions. This advantage may reflect enhanced local processing of curvature in early stages of the form vision pathway and superior global detection of shape primitives. However, more probable is the presence of a superior search process that enables a consistent search advantage at both levels of processing. En ligne : http://dx.doi.org/10.1007/s10803-012-1669-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=201

---

1 (1 - 4 / 4)