Overview
- The Annals of Dyslexia published an updated definition that replaces the 2002 guidance and removes the 15-point IQ–reading gap as a required diagnostic rule.
- The authors say standardized IQ tests should no longer be required and that standalone reading assessments are more useful for identifying dyslexia.
- The new wording expands causes beyond the old phrase 'neurobiological in origin' to explicitly include genetic influences and environmental factors and draws on research from non-English writing systems.
- The document urges earlier screening and literacy support before and during early schooling so children receive help sooner rather than waiting for later grade-based diagnosis.
- The update is advisory and the real-world impact will depend on adoption by schools, health professionals and policymakers, but it could widen access to services for children who were previously excluded.