RADAR: A Novel Fast-Screening Method for Reading Difficulties with Special Focus on Dyslexia
Ioannis Smyrnakis, Vassilios Andreadakis, Vassilios Selimis, Michail, Kalaitzakis, Theodora Bachourou, Georgios Kaloutsakis, George D. Kymionis,, Stelios Smirnakis, Ioannis M. Aslanides

TL;DR
RADAR is a quick, non-invasive eye-tracking based screening method that effectively distinguishes children with dyslexia from typical readers by analyzing their visual scanning patterns during reading.
Contribution
This study introduces RADAR, a novel eye-tracking based screening tool that reliably identifies dyslexia in children through stable, discriminative reading parameters.
Findings
Achieved 94.2% overall classification accuracy
High sensitivity (93.8%) and specificity (94.6%) in distinguishing dyslexic readers
Parameters stable under retest conditions and highly discriminative
Abstract
Dyslexia is a developmental learning disorder of single word reading accuracy and/or fluency, with compelling research directed towards understanding the contributions of the visual system. While dyslexia is not an oculomotor disease, readers with dyslexia have shown different eye movements than typically developing students during text reading. Readers with dyslexia exhibit longer and more frequent fixations, shorter saccade lengths, more backward refixations than typical readers. Furthermore, readers with dyslexia are known to have difficulty in reading long words, lower skipping rate of short words, and high gaze duration on many words. It is an open question whether it is possible to harness these distinctive oculomotor scanning patterns observed during reading in order to develop a screening tool that can reliably identify struggling readers, who may be candidates for dyslexia.…
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