How visual attention span and phonological skills contribute to N170 print tuning: An EEG study in French dyslexic students

Cheviet, Alexis; Bonnefond, Anne; Bertrand, Frédéric; Maumy-Bertrand, Myriam; Doignon-Camus, Nadège

Abstract

Developmental dyslexia is a disorder characterized by a sustainable learning deficit in reading. Based on ERP-driven approaches focusing on the visual word form area, electrophysiological studies have pointed a lack of visual expertise for written word recognition in dyslexic readers by contrasting the left-lateralized N170 amplitudes elicited by alphabetic versus non-alphabetic stimuli. Here, we investigated in 22 dyslexic participants and 22 age-matched control subjects how two behavioural abilities potentially affected in dyslexic readers (phonological and visual attention skills) contributed to the N170 expertise during a word detection task. Consistent with literature, dyslexic participants exhibited poorer performance in these both abilities as compared to healthy subjects. At the brain level, we observed (1) an unexpected preservation of the N170 expertise in the dyslexic group suggesting a possible compensatory mechanism and (2) a modulation of this expertise only by phonological skills, providing evidence for the phonological mapping deficit hypothesis.

Citation

Cheviet, A., Bonnefond, A., Bertrand, F., Maumy-Bertrand, M., & Doignon-Camus, N. (2022). How visual attention span and phonological skills contribute to N170 print tuning: An EEG study in French dyslexic students. Brain and Language, 234, Article 105176. https://doi.org/10.1016/j.bandl.2022.105176

• Journal Article Type: Article
• Acceptance Date: Aug 19, 2022
• Online Publication Date: Sep 2, 2022
• Publication Date: 2022-11
• Deposit Date: Dec 13, 2022
• Publicly Available Date: Sep 3, 2023
• Journal: Brain and Language
• Print ISSN: 0093-934X
• Electronic ISSN: 1090-2155
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 234
• Article Number: 105176
• DOI: https://doi.org/10.1016/j.bandl.2022.105176
• Public URL: https://durham-repository.worktribe.com/output/1183946