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Assessing Dyslexia at Six Year of Age
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Published on: May 1, 2020

Developmental attentional dyslexia.

Naama Friedmann1, Noa Kerbel, Lilach Shvimer

  • 1School of Education,Tel Aviv University, Tel Aviv, Israel. naamafr@post.tau.ac.il

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|September 14, 2010
PubMed
Summary
This summary is machine-generated.

Individuals with attentional dyslexia exhibit letter migration errors between words, but maintain correct letter order within words. This study details these specific reading deficit characteristics in Hebrew speakers.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Linguistics

Background:

  • Attentional dyslexia is a reading disorder characterized by letter migration between adjacent words.
  • Despite letter migration, letters are correctly identified and retain their within-word position.

Purpose of the Study:

  • To investigate the characteristics of between-word errors in Hebrew-speaking individuals with developmental attentional dyslexia.
  • To analyze the impact of word length, letter position, and word similarity on migration errors.

Main Methods:

  • 10 Hebrew-speaking participants with developmental attentional dyslexia read 2290 words in various pair presentations (horizontal, vertical, nonword).
  • Analysis focused on migration patterns, error types (migration, omission, intrusion), and influencing factors.

Main Results:

  • Letter migrations between words largely preserved within-word letter order, indicating intact within-word positional encoding.
  • Errors were more frequent in longer words and involved final Hebrew letters (leftmost).
  • Migrations occurred horizontally and vertically, with a higher rate from the first to the second word in horizontal presentation; errors increased when the migration resulted in a valid word.

Conclusions:

  • The findings suggest a specific impairment in between-word positional processing while within-word processing remains largely intact.
  • Error types include classic migration, omission of repeated letters, and intrusion of letters.
  • Factors like word length and resulting word validity influence error frequency, but word similarity does not.