The neurobiological and developmental learning disorder dyslexia possibly affects up to 15 per cent of the population, but it remains difficult, time-consuming and expensive to accurately diagnose. Screening tools, especially online checklists, can help individuals self-evaluate risk factors, but few if any have been scientifically validated until now.

In a paper published in the journal Dyslexia, Concordia researchers became the first to show that the Dyslexia Adult Checklist, a free online resource developed by the British Dyslexia Association and among the most widely used dyslexia checklists globally, is both valid and reliable as an indicator of dyslexia. They do recommend, however, lowering the threshold of mild dyslexia from its current level.

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