Perception of shadows in children with autism spectrum disorders.

<h4>Background</h4>Cast shadows in visual scenes can have profound effects on visual perception. Much as they are informative, they also constitute noise as they are salient features of the visual scene potentially interfering with the processing of other features. Here we asked i) wheth...

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Autores principales:	Cristina Becchio, Morena Mari, Umberto Castiello
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0bcf8f708b5f42bb8638af62e2b2d8db
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id	oai:doaj.org-article:0bcf8f708b5f42bb8638af62e2b2d8db
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spelling	oai:doaj.org-article:0bcf8f708b5f42bb8638af62e2b2d8db2021-12-02T20:21:46ZPerception of shadows in children with autism spectrum disorders.1932-620310.1371/journal.pone.0010582https://doaj.org/article/0bcf8f708b5f42bb8638af62e2b2d8db2010-05-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20485498/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Cast shadows in visual scenes can have profound effects on visual perception. Much as they are informative, they also constitute noise as they are salient features of the visual scene potentially interfering with the processing of other features. Here we asked i) whether individuals with autism can exploit the information conveyed by cast shadows; ii) whether they are especially sensitive to noise aspects of shadows.<h4>Methodology/principal findings</h4>Twenty high-functioning children with autism and twenty typically developing children were asked to recognize familiar objects while the presence, position, and shape of the cast shadow were systematically manipulated. Analysis of vocal reaction time revealed that whereas typically developing children used information from cast shadows to improve object recognition, in autistic children the presence of cast shadows--either congruent or incongruent--interfered with object recognition. Critically, vocal reaction times were faster when the object was presented without a cast shadow.<h4>Conclusions/significance</h4>We conclude that shadow-processing mechanisms are abnormal in autism. As a result, processing shadows becomes costly and cast shadows interfere rather than help object recognition.Cristina BecchioMorena MariUmberto CastielloPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 5, p e10582 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cristina Becchio Morena Mari Umberto Castiello Perception of shadows in children with autism spectrum disorders.
description	<h4>Background</h4>Cast shadows in visual scenes can have profound effects on visual perception. Much as they are informative, they also constitute noise as they are salient features of the visual scene potentially interfering with the processing of other features. Here we asked i) whether individuals with autism can exploit the information conveyed by cast shadows; ii) whether they are especially sensitive to noise aspects of shadows.<h4>Methodology/principal findings</h4>Twenty high-functioning children with autism and twenty typically developing children were asked to recognize familiar objects while the presence, position, and shape of the cast shadow were systematically manipulated. Analysis of vocal reaction time revealed that whereas typically developing children used information from cast shadows to improve object recognition, in autistic children the presence of cast shadows--either congruent or incongruent--interfered with object recognition. Critically, vocal reaction times were faster when the object was presented without a cast shadow.<h4>Conclusions/significance</h4>We conclude that shadow-processing mechanisms are abnormal in autism. As a result, processing shadows becomes costly and cast shadows interfere rather than help object recognition.
format	article
author	Cristina Becchio Morena Mari Umberto Castiello
author_facet	Cristina Becchio Morena Mari Umberto Castiello
author_sort	Cristina Becchio
title	Perception of shadows in children with autism spectrum disorders.
title_short	Perception of shadows in children with autism spectrum disorders.
title_full	Perception of shadows in children with autism spectrum disorders.
title_fullStr	Perception of shadows in children with autism spectrum disorders.
title_full_unstemmed	Perception of shadows in children with autism spectrum disorders.
title_sort	perception of shadows in children with autism spectrum disorders.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/0bcf8f708b5f42bb8638af62e2b2d8db
work_keys_str_mv	AT cristinabecchio perceptionofshadowsinchildrenwithautismspectrumdisorders AT morenamari perceptionofshadowsinchildrenwithautismspectrumdisorders AT umbertocastiello perceptionofshadowsinchildrenwithautismspectrumdisorders
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Perception of shadows in children with autism spectrum disorders.

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