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. 2024 Nov;30(4):e1783.
doi: 10.1002/dys.1783.

The perceptual span in dyslexic reading and visual search

Steven G Luke  1 , Celeste Tolley  1 , Adriana Gutierrez  1 , Cole Smith  1 , Toni Brown  1 , Kate Woodruff  1 , Olivia Ford  1
Affiliations

The perceptual span in dyslexic reading and visual search

Steven G Luke et al. Dyslexia. 2024 Nov.

Abstract

Many studies have attempted to identify the root cause of dyslexia. Different theories of dyslexia have proposed either a phonological, attentional, or visual deficit. While research has used eye-tracking to study dyslexia, only two previous studies have used the moving-window paradigm to explore the perceptual span in dyslexic reading, and none have done so in visual search. The present study analysed the perceptual span using both reading and visual search tasks to identify language-independent attentional impairments in dyslexics. We found equivocal evidence that the perceptual span was impaired in dyslexic reading and no evidence of impairment in visual search. However, dyslexic participants did show deficits in the visual search task, with lower search accuracy and shorter saccades compared with controls. These results lend support for a visual, rather than attentional or phonological, account of dyslexia.

Keywords: dyslexia; eye tracking; perceptual span; reading; visual search.

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References

    1. Bates D, Mächler M, Bolker B, & Walker S (2016). lme4: Linear mixed-effects models using Eigen and S4. In http://CRAN.R-project.org/package=lme4
    1. Bellocchi S, Muneaux M, Bastien-Toniazzo M, & Ducrot S (2013). I can read it in your eyes: What eye movements tell us about visuo-attentional processes in developmental dyslexia. Research in Developmental Disabilities, 34(1), 452–460. https://doi.org/doi:10.1016/j.ridd.2012.09.002 - DOI - PubMed
    1. Bergmann J, & Wimmer H (2008). A dual-route perspective on poor reading in a regular orthography: Evidence from phonological and orthographic lexical decisions. Cognitive Neuropsychology, 25(5), 653–676. https://doi.org/doi:10.1080/02643290802221404 - DOI - PMC - PubMed
    1. Bertoni S, Franceschini S, Ronconi L, Gori S, & Facoetti A (2019). Is excessive visual crowding causally linked to developmental dyslexia? Neuropsychologia, 130, 107–117. https://doi.org/doi:10.1016/j.neuropsychologia.2019.04.018 - DOI - PubMed
    1. Blythe HI, Dickins JH, Kennedy CR, & Liversedge SP (2020). The role of phonology in lexical access in teenagers with a history of dyslexia. PloS one, 15(3), e0229934. https://doi.org/doi:10.1371/journal.pone.0229934 - DOI - PMC - PubMed

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