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Experts Just Updated The Definition of Dyslexia For The First Time in 20 Years : ScienceAlert (opens in a new tab)

sciencealert.com · 2026-10-07

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Claim 1 of 8Not checkedDyslexia has just got its first official definition update in more than two decades, and it's a major one.View evidenceHide evidence

As statedfirst official update in more than two decades

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Claim 2 of 8Not checkedThe updated definition, published in the Annals of Dyslexia and authored by researchers from the US, is the result of a consultation with more than 15 international experts on the condition.View evidenceHide evidence

As statedmore than 15 international experts

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Claim 3 of 8Not checkedOne of the biggest changes is the removal of IQ tests for dyslexia; the authors say reading assessments are more useful on their own.View evidenceHide evidence

As statedremoval of IQ tests

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Claim 4 of 8Not checkedThe authors say the broader definition should catch more people who need support by no longer relying on a 15-point gap between reading scores and standardized IQ scores.View evidenceHide evidence

As stated15-point gap

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Claim 5 of 8Not checkedThe updated definition is broader about causes, mentioning genetics and environmental influences in addition to neurobiological origin.View evidenceHide evidence

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Claim 6 of 8Not checkedThe article says the new definition gives more weight to research from countries where English is not the primary language, noting that English is an outlier in spelling-sound complexity.View evidenceHide evidence

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Claim 7 of 8Not checkedThe document emphasizes early intervention and says speech delay or slow talking can be clues before children enter the classroom.View evidenceHide evidence

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Claim 8 of 8Not checkedThe new definition is described as advisory rather than definitive, with the hope that it will change how schools, healthcare professionals, and governments consider dyslexia.View evidenceHide evidence

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Crossref, PubMed, Europe PMC · 17 candidate papers

Candidate

Researching Dyslexia: From the Discrepancy Definition to Cognitive Neuroscience (1964–2009)

Dyslexia · 2022 · Crossref

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And 11 more candidates considered.