Cited by 303Reading and Literacy DevelopmentNeurobiology of Language and BilingualismVisual perception and processing mechanisms

Reading normal and degraded words: Contribution of the dorsal and ventral visual pathways.

Cohen, Laurent, Dehaene, Stanislas, Vinckier, Fabien, Jobert, Antoinette, Montavont, Alexandra·2008·NeuroImage

Abstract

Fast, parallel word recognition, in expert readers, relies on sectors of the left ventral occipito-temporal pathway collectively known as the visual word form area. This expertise is thought to arise from perceptual learning mechanisms that extract informative features from the input strings. The perceptual expertise hypothesis leads to two predictions: (1) parallel word recognition, based on the ventral visual system, should be limited to words displayed in a familiar format (foveal horizontal words with normally spaced letters); (2) words displayed in formats outside this field of expertise should be read serially, under supervision of dorsal parietal attention systems. We presented adult readers with words that were progressively degraded in three different ways (word rotation, letter spacing, and displacement to the visual periphery). Behaviorally, we identified degradation thresholds above which reading difficulty increased non-linearly, with the concomitant emergence of a word length effect on reading latencies reflecting serial reading strategies. fMRI activations were correlated with reading difficulty in bilateral occipito-temporal and parietal regions, reflecting the strategies required to identify degraded words. A core region of the intraparietal cortex was engaged in all modes of degradation. Furthermore, in the ventral pathway, word degradation led to an amplification of activation in the posterior visual word form area, at a level thought to encode single letters. We also found an effect of word length restricted to highly degraded words in bilateral occipitoparietal regions. Those results clarify when and how the ventral parallel visual word form system needs to be supplemented by the deployment of dorsal serial reading strategies.

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Crossref · 10.1016/j.neuroimage.2007.11.036

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  • Bilateral PPC shows responses that increase with word visibility.

    “In bilateral PPC (Cohen et al., 2008; Vinckier et al., 2006), we found increasing responses to word visibility (Supplementary Figure 4).”

    From The Development of Cortical Sensitivity to Visual Word Forms (2011) · cites this paper as Cohen et al., 2008

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Authors
Cohen, L., Dehaene, S., Vinckier, F., Jobert, A., & Montavont, A.
Affiliations
Inserm (FR)
Corresponding author
Cohen, Laurent
Venue
NeuroImage
Publisher
Elsevier BV
Published
2008-03-01
Volume
40
Issue
1
Pages
353-366
ISSN
1053-8119 (ISSN-L)
OpenAlex
W2034546135
Cited by
303
References
79
Citations by year
2026: 8 · 2025: 13 · 2024: 13 · 2023: 7 · 2022: 11 · 2021: 16 · 2020: 18 · 2019: 19 · 2018: 16 · 2017: 17 · 2016: 16 · 2015: 27 · 2014: 21 · 2013: 23 · 2012: 30
FWCI
17.26
Type
journal article
Language
en
Open access
closed
Locations
  • NeuroImage (publishedVersion)
  • PubMed (publishedVersion)
Funders
Institut National de la Santé et de la Recherche Médicale
Topics
  • Social Sciences › Psychology › Developmental and Educational Psychology › Reading and Literacy Development
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
visual word recognition, visual word form area, dorsal visual pathway, ventral stream, perceptual expertise, intraparietal cortex, letter spacing, visual periphery, word length effect, reading latency
MeSH terms
Adult, Attention, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Nerve Net, Occipital Lobe, Orientation, Parietal Lobe, Photic Stimulation, Reading, Temporal Lobe, Visual Pathways, Recognition, Psychology

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