Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: May 10, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
05:38

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Published on: June 29, 2021

Paying attention to orthography: a visual evoked potential study.

Anthony T Herdman1, Osamu Takai

  • 1BRANE Lab, School of Audiology and Speech Sciences, University of British Columbia Vancouver, BC, Canada.

Frontiers in Human Neuroscience
|June 5, 2013
PubMed
Summary

Visual processing of single letters and pseudoletters in adults is sensory-contingent. Attention to orthographic features does not alter early visual processing in extrastriate regions.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Effectiveness and safety of low-energy shock wave therapy for digital ulcers associated with systemic sclerosis: A Phase 3 pivotal clinical trial.

Modern rheumatology·2024
Same author

SimMEEG software for simulating event-related MEG and EEG data with underlying functional connectivity.

Journal of neuroscience methods·2020
Same author

Rheumatoid arthritis patients with low baseline Health Assessment Questionnaire scores have a risk of functional disability progression: a post hoc analysis of a nationwide longitudinal cohort in Japan.

Clinical and experimental rheumatology·2020
Same author

A Systematic Review of Tracheostomy Modifications and Swallowing in Adults.

Dysphagia·2020
Same author

Solution Plasma Process-Derived Defect-Induced Heterophase Anatase/Brookite TiO<sub>2</sub> Nanocrystals for Enhanced Gaseous Photocatalytic Performance.

ACS omega·2019
Same author

Observation of wet specimens sensitive to evaporation using scanning electron microscopy.

Microscopy (Oxford, England)·2018

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Efficient reading relies on rapid identification of letters and words within visual networks.
  • Orthographic processing research often uses complex stimuli like words and letter strings.
  • Investigating single letter processing offers deeper insights into orthographic mechanisms.

Purpose of the Study:

  • To examine orthographic processing of single letters and pseudoletters in adults.
  • To determine the influence of attention on early visual processing of orthographic stimuli.
  • To differentiate neural responses to letters versus pseudoletters under varying attentional demands.

Main Methods:

  • Measured evoked potentials (EPs) to single letters and pseudoletters in adults.
Keywords:
attentiondipole modelingorthographyreadingvisual evoked potential (VEP)

More Related Videos

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

A Semantic Priming Event-related Potential (ERP) Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder
08:17

A Semantic Priming Event-related Potential (ERP) Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder

Published on: April 12, 2018

Related Experiment Videos

Last Updated: May 10, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
05:38

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

Published on: June 29, 2021

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

A Semantic Priming Event-related Potential (ERP) Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder
08:17

A Semantic Priming Event-related Potential (ERP) Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder

Published on: April 12, 2018

  • Employed three tasks: orthographic discrimination, color discrimination, and target detection.
  • Utilized dipole analyses to localize neural sources of observed effects.

    • Main Results:

    • Pseudoletters elicited larger and later N1 (~170 ms) and P2 (~250 ms) responses compared to letters, indicating greater visual processing.
    • These differences were localized to bilateral fusiform and inferior temporal cortices.
    • Task demands (attentional focus) did not modulate the letter-pseudoletter difference in early visual processing.

    Conclusions:

    • Early visual processing of single letters and pseudoletters is primarily sensory-contingent.
    • Attentional modulation does not significantly impact early orthographic processing in extrastriate visual areas.
    • Findings suggest that basic visual feature processing precedes attentional effects in orthographic tasks.