The International Dyslexia Association (IDA) is pleased to announce the release of its updated 2025 definition of dyslexia — the first major revision since the widely referenced 2002 working definition. This new definition reflects significant scientific advances and incorporates the perspectives of researchers, educators, clinicians, advocates, and individuals with dyslexia from around the world.
The updated definition aims to promote a more inclusive, science-informed understanding of dyslexia worldwide and to encourage early identification and appropriate support. Rooted in decades of research, it seeks to better capture the complexity of dyslexia and the variability of how it presents across individuals and writing systems.
This revision underscores IDA’s continued commitment to advancing evidence-based knowledge about reading and ensuring that individuals with dyslexia receive the recognition, resources, and opportunities they need to thrive.
We encourage educators, parents, policymakers, and community members to read the full 2025 definition and explore the background, rationale, and implications.
To review the definition and read more click here.
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