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Related Experiment Video

Updated: Jul 5, 2026

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Published on: June 25, 2019

Letter position coding in attentional dyslexia.

Lilach Shalev¹, Carmel Mevorach, Glyn W Humphreys

¹School of Education, The Hebrew University of Jerusalem, Israel. mlilach@mscc.huji.ac.il

Neuropsychologia

|April 19, 2008

Summary

This summary is machine-generated.

Patients with attentional dyslexia, a reading disorder, show sensitivity to visual word structure. Their reading is primarily influenced by orthographic similarity, not sound-based patterns.

More Related Videos

Assessing Dyslexia at Six Year of Age

Assessing Dyslexia at Six Year of Age

Published on: May 1, 2020

Related Experiment Videos

Last Updated: Jul 5, 2026

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment

Published on: June 25, 2019

Assessing Dyslexia at Six Year of Age

Assessing Dyslexia at Six Year of Age

Published on: May 1, 2020

Area of Science:

Cognitive Neuroscience
Psycholinguistics
Neurology

Background:

Attentional dyslexia is a reading disorder associated with bilateral parietal damage.
Understanding visual word recognition is crucial for diagnosing and treating reading impairments.

Purpose of the Study:

To investigate the roles of orthographic and phonological coding in attentional dyslexia.
To explore how patients with attentional dyslexia process visual word information.

Main Methods:

Two experiments involving lexical decision tasks were conducted with two patients exhibiting attentional dyslexia.
Nonwords were systematically varied for orthographic and phonological similarity to real words.

Main Results:

Patients demonstrated sensitivity to orthographic similarity, accepting nonwords that could form real words through letter migration.
Phonological similarity did not influence their decisions.
Transposing initial letters significantly reduced nonword acceptance, suggesting privileged coding of early letter positions.

Conclusions:

Attentional dyslexics primarily rely on orthographic similarity for visual word recognition.
Despite deficits in positional coding, the initial letters of words receive privileged processing.