Related Experiment Video
Updated: May 24, 2026
15:00
Assessing Dyslexia at Six Year of Age
Published on: May 1, 2020
[Is dyslexia a visual perceptive disorder? New empirical data].
Paz Suárez Coalla1, Fernando Cuetos Vega
1Facultad de Psicología, Universidad de Oviedo, 33003 Oviedo, Spain. suarezpaz@uniovi.es
Psicothema
|March 17, 2012
Summary
Developmental dyslexia originates from phonological deficits, not visual problems. This study found dyslexic children perform similarly to peers on visual tasks, confirming difficulties with phonological coding, not visual perception.
Area of Science:
- Neuroscience
- Developmental Psychology
- Educational Psychology
Context:
- Despite the established link between phonological deficits and developmental dyslexia, visual criteria persist in diagnosis and intervention.
- This research investigates the presence of visual processing issues in children with developmental dyslexia.
Purpose:
- To determine if children with developmental dyslexia exhibit visual perceptual problems.
- To differentiate between visual and phonological processing in dyslexia.
Summary:
- Dyslexic children and age-matched controls without reading difficulties completed visual tasks, including a Reversal test and a visual decision task involving letter pair identification.
- Performance was measured by reaction times and accuracy in distinguishing between identical and different visual stimuli.
- Results indicated no significant difference in visual perceptual abilities between dyslexic and control groups.
Impact:
- This study refutes the notion that visual deficits underlie developmental dyslexia.
- Findings reinforce the phonological deficit theory, highlighting the critical need for interventions targeting phonological coding skills for graphemes.
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