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Related Experiment Video

Updated: Mar 7, 2026

Assessing Dyslexia at Six Year of Age

Assessing Dyslexia at Six Year of Age

Published on: May 1, 2020

It's about time: revisiting temporal processing deficits in dyslexia.

Laurence Casini^1,2, Catherine Pech-Georgel³, Johannes C Ziegler^2,4,5

¹Aix Marseille Univ, CNRS, LNC, Laboratoire de Neurosciences Cognitives, Marseille, France.

Developmental Science

|February 28, 2017

Summary

Children with dyslexia show significant deficits in temporal processing across auditory and visual tasks. These challenges are specific to time perception, suggesting an internal clock dysfunction, aligning with temporal sampling theory.

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Area of Science:

Neuroscience
Developmental Psychology
Cognitive Science

Background:

Dyslexia is a common developmental disorder affecting reading acquisition.
Temporal processing deficits have been implicated in dyslexia, but require further investigation across modalities.

Purpose of the Study:

To evaluate temporal processing abilities in French children with dyslexia.
To differentiate temporal processing deficits from other cognitive impairments in dyslexia.

Main Methods:

Dyslexic children and age/reading-level matched controls completed three tasks: implicit word identification, explicit auditory bisection, and explicit visual bisection.
Performance was compared across temporal tasks and a non-temporal intensity task.

Main Results:

Children with dyslexia exhibited significant deficits in both implicit and explicit temporal tasks across auditory and visual modalities.
Increased perceptual variability in temporal tasks, but not in non-temporal intensity tasks, was observed in dyslexic children.
These findings suggest temporal processing, not general cognitive or attentional issues, is impaired.

Conclusions:

Dyslexia is associated with specific deficits in temporal processing, likely stemming from an 'internal clock' dysfunction.
Results support the temporal sampling theory of dyslexia, highlighting the role of time perception in reading disorders.