Developmental Eye Movement test and dyslexic children: A pilot study with eye movement recordings

Area of Science:

• Neuroscience
• Developmental Psychology
• Ophthalmology

Background:

• Reading difficulties in dyslexia are often linked to visual processing and oculomotor control deficits.
• The Developmental Eye Movement (DEM) test is a common tool for assessing reading-related eye movements.

Purpose of the Study:

• To investigate eye movement patterns during the DEM test in children with and without dyslexia.
• To compare oculomotor behavior between dyslexic, non-dyslexic chronological age-matched, and non-dyslexic reading age-matched children.

Main Methods:

• Utilized eye movement recordings (SuriCog eye tracker) during Test C of the DEM test.
• Compared data from 13 children with dyslexia, 13 age-matched controls, and 13 reading-matched controls.

Main Results:

• Children with dyslexia and reading-age-matched controls showed significantly longer fixation times and slower reading of DEM Test C compared to chronological-age-matched controls.
• A correlation was observed between fixation duration, words read per minute, and total reading time for DEM Test C.

Conclusions:

• The DEM test effectively reveals oculomotor differences in dyslexic children.
• Maturation of cortical structures influencing fixation is critical for developing reading proficiency.