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Spatial localisation in autism: evidence for differences in early cortical visual processing / Keziah LATHAM in Molecular Autism, (February 2013)
[article]
Titre : Spatial localisation in autism: evidence for differences in early cortical visual processing Type de document : Texte imprimé et/ou numérique Auteurs : Keziah LATHAM, Auteur ; Susana T.L. CHUNG, Auteur ; Peter M. ALLEN, Auteur ; Teresa TAVASSOLI, Auteur ; Simon BARON-COHEN, Auteur Année de publication : 2013 Article en page(s) : 4 p. Langues : Anglais (eng) Mots-clés : Autism spectrum conditions Spatial vision Vernier acuity Hyperacuity Psychophysics Visual processing Index. décimale : PER Périodiques Résumé : Background
Vision in people with autism spectrum conditions (ASC) is reported to be different from people without ASC, but the neural level at which the differences begin to occur is not yet known. Here we examine two variants of a vernier acuity task to determine if differences are evident in early visual processing.
Findings
Abutting and separated vernier acuity was assessed in 16 people with ASC and 14 matched controls. In controls, abutting and separated thresholds were unrelated (r = 0.13, p = 0.65), suggesting thresholds are determined by two separate mechanisms. In contrast, the abutting and separated thresholds of ASC observers were strongly correlated (r = 0.88, p < 0.0001), with separated thresholds tending towards being superior to those of controls [t(28) = ?2.46, p = 0.02].
Conclusions
The findings suggest the mechanisms employed by ASC observers in separated vernier tasks are different to those of controls. This psychophysical evidence suggests that visual differences in ASC may begin at an early cortical stage of visual processing.En ligne : http://dx.doi.org/10.1186/2040-2392-4-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202
in Molecular Autism > (February 2013) . - 4 p.[article] Spatial localisation in autism: evidence for differences in early cortical visual processing [Texte imprimé et/ou numérique] / Keziah LATHAM, Auteur ; Susana T.L. CHUNG, Auteur ; Peter M. ALLEN, Auteur ; Teresa TAVASSOLI, Auteur ; Simon BARON-COHEN, Auteur . - 2013 . - 4 p.
Langues : Anglais (eng)
in Molecular Autism > (February 2013) . - 4 p.
Mots-clés : Autism spectrum conditions Spatial vision Vernier acuity Hyperacuity Psychophysics Visual processing Index. décimale : PER Périodiques Résumé : Background
Vision in people with autism spectrum conditions (ASC) is reported to be different from people without ASC, but the neural level at which the differences begin to occur is not yet known. Here we examine two variants of a vernier acuity task to determine if differences are evident in early visual processing.
Findings
Abutting and separated vernier acuity was assessed in 16 people with ASC and 14 matched controls. In controls, abutting and separated thresholds were unrelated (r = 0.13, p = 0.65), suggesting thresholds are determined by two separate mechanisms. In contrast, the abutting and separated thresholds of ASC observers were strongly correlated (r = 0.88, p < 0.0001), with separated thresholds tending towards being superior to those of controls [t(28) = ?2.46, p = 0.02].
Conclusions
The findings suggest the mechanisms employed by ASC observers in separated vernier tasks are different to those of controls. This psychophysical evidence suggests that visual differences in ASC may begin at an early cortical stage of visual processing.En ligne : http://dx.doi.org/10.1186/2040-2392-4-4 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202