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Components of attention in grapheme-color synesthesia: A modeling approach

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dc.contributor Háskólinn á Akureyri
dc.contributor University of Akureyri
dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Ásgeirsson, Árni
dc.contributor.author Nordfang, Maria
dc.contributor.author Sørensen, Thomas Alrik
dc.date.accessioned 2019-04-29T15:44:16Z
dc.date.available 2019-04-29T15:44:16Z
dc.date.issued 2015-08-07
dc.identifier.citation Ásgeirsson ÁG, Nordfang M, Sørensen TA (2015) Components of Attention in Grapheme-Color Synesthesia: A Modeling Approach. PLoS ONE 10(8): e0134456. doi:10.1371/journal.pone.0134456
dc.identifier.issn 1932-6203
dc.identifier.uri https://hdl.handle.net/20.500.11815/1149
dc.description Publisher's version (útgefin grein)
dc.description.abstract Grapheme-color synesthesia is a condition where the perception of graphemes consistently and automatically evokes an experience of non-physical color. Many have studied how synesthesia affects the processing of achromatic graphemes, but less is known about the synesthetic processing of physically colored graphemes. Here, we investigated how the visual processing of colored letters is affected by the congruence or incongruence of synesthetic grapheme-color associations. We briefly presented graphemes (10–150 ms) to 9 grapheme-color synesthetes and to 9 control observers. Their task was to report as many letters (targets) as possible, while ignoring digit (distractors). Graphemes were either congruently or incongruently colored with the synesthetes’ reported grapheme-color association. A mathematical model, based on Bundesen’s (1990) Theory of Visual Attention (TVA), was fitted to each observer’s data, allowing us to estimate discrete components of visual attention. The models suggested that the synesthetes processed congruent letters faster than incongruent ones, and that they were able to retain more congruent letters in visual short-term memory, while the control group’s model parameters were not significantly affected by congruence. The increase in processing speed, when synesthetes process congruent letters, suggests that synesthesia affects the processing of letters at a perceptual level. To account for the benefit in processing speed, we propose that synesthetic associations become integrated into the categories of graphemes, and that letter colors are considered as evidence for making certain perceptual categorizations in the visual system. We also propose that enhanced visual short-term memory capacity for congruently colored graphemes can be explained by the synesthetes’ expertise regarding their specific grapheme-color associations.
dc.description.sponsorship The operating costs of this research were covered by a grant from the Kristian Holt-Hansen foundation. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
dc.format.extent e0134456
dc.language.iso en
dc.publisher Public Library of Science (PLoS)
dc.relation.ispartofseries Plos One;10(8)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Grapheme color synesthesia
dc.subject Color
dc.subject Samskynjun
dc.subject Litir
dc.title Components of attention in grapheme-color synesthesia: A modeling approach
dc.type info:eu-repo/semantics/article
dcterms.license © 2015 Ásgeirsson et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.description.version Peer reviewed
dc.identifier.journal Plos One
dc.identifier.doi 10.1371/journal.pone.0134456
dc.relation.url http://dx.plos.org/10.1371/journal.pone.0134456
dc.contributor.department Sálfræðideild (HA)
dc.contributor.department Faculty of Psychology (UA)
dc.contributor.department Sálfræðideild (HÍ)
dc.contributor.department Faculty of Psychology (UI)
dc.contributor.school Hug- og félagsvísindasvið (HA)
dc.contributor.school School of Humanities and Social Sciences (UA)
dc.contributor.school Heilbrigðisvísindasvið (HÍ)
dc.contributor.school School of Health Sciences (UI)

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