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Words as visual objects : Neural and behavioral evidence for high-level visual impairments in dyslexia

Words as visual objects : Neural and behavioral evidence for high-level visual impairments in dyslexia


Title: Words as visual objects : Neural and behavioral evidence for high-level visual impairments in dyslexia
Author: Sigurðardóttir, Heiða María
Ólafsdóttir, Inga María   orcid.org/0000-0003-0341-2943
Devillez, Hélène
Date: 2021-11
Language: English
Scope:
University/Institute: University of Iceland
Department: Faculty of Psychology
Series: Brain Sciences; 11(11)
ISSN: 2076-3425
DOI: https://doi.org/10.3390/brainsci11111427
Subject: Lesblinda; Sjónskynjun; Skynjun; Lestur; Dyslexia; Face perception; High-level vision; Object perception; Reading; Neuroscience (all)
URI: https://hdl.handle.net/20.500.11815/2805

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Citation:

Sigurðardóttir , H M , Ólafsdóttir , I M & Devillez , H 2021 , ' Words as visual objects : Neural and behavioral evidence for high-level visual impairments in dyslexia ' , Brain Sciences , vol. 11 , no. 11 , 1427 . https://doi.org/10.3390/brainsci11111427

Abstract:

Developmental dyslexia is defined by reading impairments that are disproportionate to intelligence, motivation, and the educational opportunities considered necessary for reading. Its cause has traditionally been considered to be a phonological deficit, where people have difficulties with differentiating the sounds of spoken language. However, reading is a multidimensional skill and relies on various cognitive abilities. These may include high-level vision—the processes that support visual recognition despite innumerable image variations, such as in viewpoint, position, or size. According to our high-level visual dysfunction hypothesis, reading problems of some people with dyslexia can be a salient manifestation of a more general deficit of high-level vision. This paper provides a perspective on how such non-phonological impairments could, in some cases, cause dyslexia. To argue in favor of this hypothesis, we will discuss work on functional neuroimaging, structural imaging, electrophysiology, and behavior that provides evidence for a link between high-level visual impairment and dyslexia.

Description:

Funding: This research was funded by The Icelandic Research Fund (Grants No. 174013-051, 195912-053, 218092-051) and the University of Iceland Research Fund. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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