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  The relation between the degree of synaesthesia, autistic traits, and local/global visual perception

Burghoorn, F., Dingemanse, M., Van Lier, R., & Van Leeuwen, T. M. (2019). The relation between the degree of synaesthesia, autistic traits, and local/global visual perception. Journal of Autism and Developmental Disorders. Advance online publication. doi:10.1007/s10803-019-04222-7.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-9F76-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-AECF-0
Genre: Journal Article

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Burghoorn et al_2019_The Relation Between Autistic Traits, the Degree of Synaesthesia, and.pdf (Publisher version), 938KB
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Burghoorn et al_2019_The Relation Between Autistic Traits, the Degree of Synaesthesia, and.pdf
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2019-09-14
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This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Burghoorn, Floor1, Author
Dingemanse, Mark1, 2, Author              
Van Lier, Rob1, Author
Van Leeuwen, Tessa M.1, Author
Affiliations:
1Donders Institute for Brain, Cognition and Behaviour, External Organizations, ou_55236              
2Multimodal Language and Cognition, Radboud University Nijmegen, External Organizations, ou_3055480              

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 Abstract: In individuals with synaesthesia specific sensory stimulation leads to unusual concurrent perceptions in the same or a different modality. Recent studies have demonstrated a high co-occurrence between synaesthesia and autism spectrum disorder (ASD), a condition also characterized by altered perception. A potentially shared characteristic of synaesthesia and ASD is a bias towards local (detail-focussed) perception. We investigated whether a bias towards local perception is indeed shared between synaesthesia and ASD. In a neurotypical population, we studied the relation between the degree of autistic traits (measured by the AQ) and the degree of grapheme-colour synaesthesia (measured by a consistency task), as well as whether both are related to a local bias in tasks assessing local/global visual perception. A positive correlation between total AQ scores and the degree of synaesthesia was found. Our study extends previous studies that found a high ASD-synaesthesia co-occurrence in clinical populations. Consistent with the hypothesized local perceptual bias in ASD, scores on the AQ-attention to detail subscale were related to increased performance on an Embedded Figures Task (EFT), and we found evidence for a relation to reduced susceptibility to visual illusions. We found no relation between autistic traits and local visual perception in a motion coherence task (MCT). Also, no relation between synaesthesia and local visual perception was found, although a reduced susceptibility to visual illusions resembled the results obtained for AQ-atttention to detail subscale. A suggested explanation for the absence of a relationship between the degree of synaesthesia and a local bias is that a possible local bias might be more pronounced in supra-threshold synaesthetes (compared to neurotypicals).

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Language(s): eng - English
 Dates: 2019-042019-09-062019-09-14
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1007/s10803-019-04222-7
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Title: Journal of Autism and Developmental Disorders. Advance online publication
Source Genre: Journal
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Pages: 18 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: DOI: 10.1007/s10803-019-04222-7