The IDA Just Updated Its Definition of Dyslexia. Here’s What You Need to Know.
After more than two decades, the International Dyslexia Association (IDA) has released a new definition of dyslexia – and it matters for anyone working with or raising kids who struggle with reading.
The 2025 definition isn’t just an academic exercise. It reflects what researchers have learned over the past 20+ years and, crucially, what individuals with dyslexia and their families have been telling us about their experiences all along.
What’s actually new?
The basics haven’t changed: dyslexia is still recognized as a specific learning disability that affects word reading and spelling. But the new definition gets more precise about what that really means.
It now explicitly addresses that dyslexia affects both accuracy and speed. Not just whether a child can eventually read a word, but how long it takes them to do it. It acknowledges that dyslexia looks different across languages depending on how those languages are written. And it makes clear that these difficulties persist even when students receive instruction that works for their classmates.
The definition also drops outdated concepts. There’s no mention of IQ discrepancies or cognitive profiles – approaches that research has shown don’t actually help us identify or support students with dyslexia.
The bigger picture
What stands out most in this update is its recognition that dyslexia affects more than just reading scores. The definition explicitly names the secondary consequences: reading comprehension struggles, limited vocabulary growth, challenges with written expression, and impacts on psychological well-being and future employment.
When we understand the full scope of how dyslexia affects a person’s life, we can provide better, more holistic support.
Why it matters for your work
The causes of dyslexia are complex, involving genetics, brain differences, and environmental factors that interact throughout a person’s development. But here’s the critical part: instruction matters enormously. Ineffective instruction makes things worse. Effective instruction, particularly early, structured literacy support, can change outcomes.
That’s exactly why Project Uplift exists. Our training equips educators to recognize dyslexia early and respond with evidence-based approaches that actually work.
It’s never too late, but earlier is better
The new definition includes something you don’t usually see in formal definitions: a direct statement about the importance of early identification and intervention. Research is clear that language and literacy support in the early years has the biggest impact. But support at any age can make a meaningful difference.
Whether you’re a teacher noticing a student who’s falling behind despite good instruction, or a parent wondering why reading is such a battle at home, understanding dyslexia is the first step toward getting the right help.
Want to learn more about bringing effective dyslexia training to your school or community? Contact us about our program.
Read the full definition from IDA HERE.