• Spatiotemporal letter processi...

*Result*: Spatiotemporal letter processing in visual word recognition uncovered by perceptual oscillations.

Title:
Spatiotemporal letter processing in visual word recognition uncovered by perceptual oscillations.
Authors:
Arguin M; Département de Psychologie and Centre Interdisciplinaire de Recherche sur le Cerveau et l'Apprentissage, Université de Montréal, Montréal, Canada.; Centre de Recherche, Institut Universitaire de Gériatrie de Montréal, Montréal, Canada.; martin.arguin@umontreal.ca https://www.neurocognitionvisionlab.org.; https://orcid.org/0000-0002-1036-2932., Fortier-St-Pierre S; Hôpital en Santé Mentale Rivière-des-Prairies, Montréal, Canada.; simonfstp.neuropsy@gmail.com.
Source:
Journal of vision [J Vis] 2025 Dec 01; Vol. 25 (14), pp. 8.
Publication Type:
Journal Article
Language:
English
Journal Info:
Publisher: Association for Research in Vision and Ophthalmology (ARVO) Country of Publication: United States NLM ID: 101147197 Publication Model: Print Cited Medium: Internet ISSN: 1534-7362 (Electronic) Linking ISSN: 15347362 NLM ISO Abbreviation: J Vis Subsets: MEDLINE
Imprint Name(s):
Publication: <2002->: [Rockville, MD] : Association for Research in Vision and Ophthalmology (ARVO)
Original Publication: Charlottesville, VA : Scholar One, Inc., [2001]-
MeSH Terms:
Pattern Recognition, Visual*/physiology , Reading* , Recognition, Psychology*/physiology, Humans ; Photic Stimulation/methods ; Young Adult ; Male ; Adult ; Female ; Signal-To-Noise Ratio
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Entry Date(s):
Date Created: 20251215 Date Completed: 20251215 Latest Revision: 20251219
Update Code:
20260130
PubMed Central ID:
PMC12710787
DOI:
10.1167/jov.25.14.8
PMID:
41396456
Database:
MEDLINE

*Further Information*

*Despite decades of intense study, the spatiotemporal processing of letters in visual word recognition has yet to be elucidated, with the debate largely focusing on whether individual letters are processed serially or in parallel. The present study investigated the processing of individual letters and letter combinations through time in visual word recognition using displays where signal-to-noise ratio (SNR) varied randomly throughout a 200 ms exposure duration. In Experiment 1, SNR varied either homogeneously across all letters or independently for each letter position (cf. heterogeneous sampling). Reading accuracy was substantially greater with homogeneous than heterogeneous sampling. Experiment 2 again used heterogeneous sampling and classification images (CIs) were calculated for individual letter positions or conjunctions thereof, reflecting processing efficiency according to time during target exposure. These CIs or their Fourier transforms were passed to a classifier to assess differences in the result patterns across individual letter positions or their conjunctions. Overall, the present results indicate the following: (1) significant parallel letter processing capacity throughout exposure duration; (2) dissociable processing mechanisms for each letter position; and (3) letter position-specific mechanisms for letter conjunctions that are distinct from those for individual letters. The results also provide evidence relevant to the neural code underlying the perceptual mechanisms that were uncovered.*