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Susceptibility to Ebbinghaus and Muller-Lyer illusions in autistic children: a comparison of three different methods / C. MANNING in Molecular Autism, 8 (2017)
[article]
Titre : Susceptibility to Ebbinghaus and Muller-Lyer illusions in autistic children: a comparison of three different methods Type de document : Texte imprimé et/ou numérique Auteurs : C. MANNING, Auteur ; M. J. MORGAN, Auteur ; C. T. W. ALLEN, Auteur ; E. PELLICANO, Auteur Article en page(s) : 16p. Langues : Anglais (eng) Mots-clés : Adolescent Autistic Disorder/*psychology Child Female Humans Male Optical Illusions/*physiology Pattern Recognition, Visual Photic Stimulation/*methods Size Perception *Autism *Cognitive bias *Context *Global processing *Perception *Response bias *Vision *Visual illusions Index. décimale : PER Périodiques Résumé : BACKGROUND: Studies reporting altered susceptibility to visual illusions in autistic individuals compared to that typically developing individuals have been taken to reflect differences in perception (e.g. reduced global processing), but could instead reflect differences in higher-level decision-making strategies. METHODS: We measured susceptibility to two contextual illusions (Ebbinghaus, Muller-Lyer) in autistic children aged 6-14 years and typically developing children matched in age and non-verbal ability using three methods. In experiment 1, we used a new two-alternative-forced-choice method with a roving pedestal designed to minimise cognitive biases. Here, children judged which of two comparison stimuli was most similar in size to a reference stimulus. In experiments 2 and 3, we used methods previously used with autistic populations. In experiment 2, children judged whether stimuli were the 'same' or 'different', and in experiment 3, we used a method-of-adjustment task. RESULTS: Across all tasks, autistic children were equally susceptible to the Ebbinghaus illusion as typically developing children. Autistic children showed a heightened susceptibility to the Muller-Lyer illusion, but only in the method-of-adjustment task. This result may reflect differences in decisional criteria. CONCLUSIONS: Our results are inconsistent with theories proposing reduced contextual integration in autism and suggest that previous reports of altered susceptibility to illusions may arise from differences in decision-making, rather than differences in perception per se. Our findings help to elucidate the underlying reasons for atypical responses to perceptual illusions in autism and call for the use of methods that reduce cognitive bias when measuring illusion susceptibility. En ligne : http://dx.doi.org/10.1186/s13229-017-0127-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330
in Molecular Autism > 8 (2017) . - 16p.[article] Susceptibility to Ebbinghaus and Muller-Lyer illusions in autistic children: a comparison of three different methods [Texte imprimé et/ou numérique] / C. MANNING, Auteur ; M. J. MORGAN, Auteur ; C. T. W. ALLEN, Auteur ; E. PELLICANO, Auteur . - 16p.
Langues : Anglais (eng)
in Molecular Autism > 8 (2017) . - 16p.
Mots-clés : Adolescent Autistic Disorder/*psychology Child Female Humans Male Optical Illusions/*physiology Pattern Recognition, Visual Photic Stimulation/*methods Size Perception *Autism *Cognitive bias *Context *Global processing *Perception *Response bias *Vision *Visual illusions Index. décimale : PER Périodiques Résumé : BACKGROUND: Studies reporting altered susceptibility to visual illusions in autistic individuals compared to that typically developing individuals have been taken to reflect differences in perception (e.g. reduced global processing), but could instead reflect differences in higher-level decision-making strategies. METHODS: We measured susceptibility to two contextual illusions (Ebbinghaus, Muller-Lyer) in autistic children aged 6-14 years and typically developing children matched in age and non-verbal ability using three methods. In experiment 1, we used a new two-alternative-forced-choice method with a roving pedestal designed to minimise cognitive biases. Here, children judged which of two comparison stimuli was most similar in size to a reference stimulus. In experiments 2 and 3, we used methods previously used with autistic populations. In experiment 2, children judged whether stimuli were the 'same' or 'different', and in experiment 3, we used a method-of-adjustment task. RESULTS: Across all tasks, autistic children were equally susceptible to the Ebbinghaus illusion as typically developing children. Autistic children showed a heightened susceptibility to the Muller-Lyer illusion, but only in the method-of-adjustment task. This result may reflect differences in decisional criteria. CONCLUSIONS: Our results are inconsistent with theories proposing reduced contextual integration in autism and suggest that previous reports of altered susceptibility to illusions may arise from differences in decision-making, rather than differences in perception per se. Our findings help to elucidate the underlying reasons for atypical responses to perceptual illusions in autism and call for the use of methods that reduce cognitive bias when measuring illusion susceptibility. En ligne : http://dx.doi.org/10.1186/s13229-017-0127-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330 A few of my favorite things: circumscribed interests in autism are not accompanied by increased attentional salience on a personalized selective attention task / O. E. PARSONS in Molecular Autism, 8 (2017)
[article]
Titre : A few of my favorite things: circumscribed interests in autism are not accompanied by increased attentional salience on a personalized selective attention task Type de document : Texte imprimé et/ou numérique Auteurs : O. E. PARSONS, Auteur ; Andrew P. BAYLISS, Auteur ; A. REMINGTON, Auteur Article en page(s) : 20p. Langues : Anglais (eng) Mots-clés : Adolescent Adult Attention/*physiology Autistic Disorder/*psychology Humans Photic Stimulation/*methods Reaction Time Visual Perception Young Adult *Attention *Autism *Circumscribed interests *Perception *Special interests Index. décimale : PER Périodiques Résumé : BACKGROUND: Autistic individuals commonly show circumscribed or "special" interests: areas of obsessive interest in a specific category. The present study investigated what impact these interests have on attention, an aspect of autistic cognition often reported as altered. In neurotypical individuals, interest and expertise have been shown to result in an automatic attentional priority for related items. Here, we examine whether this change in salience is also seen in autism. METHODS: Adolescents and young adults with and without autism performed a personalized selective attention task assessing the level of attentional priority afforded to images related to the participant's specific interests. In addition, participants performed a similar task with generic images in order to isolate any effects of interest and expertise. Crucially, all autistic and non-autistic individuals recruited for this study held a strong passion or interest. As such, any differences in attention could not be solely attributed to differing prevalence of interests in the two groups. In both tasks, participants were asked to perform a central target-detection task while ignoring irrelevant distractors (related or unrelated to their interests). The level of distractor interference under various task conditions was taken as an indication of attentional priority. RESULTS: Neurotypical individuals showed the predicted attentional priority for the circumscribed interest images but not generic items, reflecting the impact of their interest and expertise. Contrary to predictions, autistic individuals did not show this priority: processing the interest-related stimuli only when task demands were low. Attention to images unrelated to circumscribed interests was equivalent in the two groups. CONCLUSIONS: These results suggest that despite autistic individuals holding an intense interest in a particular class of stimuli, there may be a reduced impact of this prior experience and expertise on attentional processing. The implications of this absence of automatic priority are discussed in terms of the behaviors associated with the condition. En ligne : http://dx.doi.org/10.1186/s13229-017-0132-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330
in Molecular Autism > 8 (2017) . - 20p.[article] A few of my favorite things: circumscribed interests in autism are not accompanied by increased attentional salience on a personalized selective attention task [Texte imprimé et/ou numérique] / O. E. PARSONS, Auteur ; Andrew P. BAYLISS, Auteur ; A. REMINGTON, Auteur . - 20p.
Langues : Anglais (eng)
in Molecular Autism > 8 (2017) . - 20p.
Mots-clés : Adolescent Adult Attention/*physiology Autistic Disorder/*psychology Humans Photic Stimulation/*methods Reaction Time Visual Perception Young Adult *Attention *Autism *Circumscribed interests *Perception *Special interests Index. décimale : PER Périodiques Résumé : BACKGROUND: Autistic individuals commonly show circumscribed or "special" interests: areas of obsessive interest in a specific category. The present study investigated what impact these interests have on attention, an aspect of autistic cognition often reported as altered. In neurotypical individuals, interest and expertise have been shown to result in an automatic attentional priority for related items. Here, we examine whether this change in salience is also seen in autism. METHODS: Adolescents and young adults with and without autism performed a personalized selective attention task assessing the level of attentional priority afforded to images related to the participant's specific interests. In addition, participants performed a similar task with generic images in order to isolate any effects of interest and expertise. Crucially, all autistic and non-autistic individuals recruited for this study held a strong passion or interest. As such, any differences in attention could not be solely attributed to differing prevalence of interests in the two groups. In both tasks, participants were asked to perform a central target-detection task while ignoring irrelevant distractors (related or unrelated to their interests). The level of distractor interference under various task conditions was taken as an indication of attentional priority. RESULTS: Neurotypical individuals showed the predicted attentional priority for the circumscribed interest images but not generic items, reflecting the impact of their interest and expertise. Contrary to predictions, autistic individuals did not show this priority: processing the interest-related stimuli only when task demands were low. Attention to images unrelated to circumscribed interests was equivalent in the two groups. CONCLUSIONS: These results suggest that despite autistic individuals holding an intense interest in a particular class of stimuli, there may be a reduced impact of this prior experience and expertise on attentional processing. The implications of this absence of automatic priority are discussed in terms of the behaviors associated with the condition. En ligne : http://dx.doi.org/10.1186/s13229-017-0132-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=330