The Science, the Struggle, and the Strength Behind the World’s Most Common Learning Difference

What is Dyslexia?

The Science, the Struggle, and the Strength Behind the World’s Most Common Learning Difference

Watching your child struggle with reading and not knowing why can feel both overwhelming and isolating. If you’ve ever felt that way, this post is for you. Dyslexia is the most common learning difference of all, affecting roughly 1 in 7 people, and yet it remains one of the most misunderstood. Reading is supposed to open doors, to stories, to knowledge, to possibility. For children with dyslexia, that door can feel like a wall. Understanding what dyslexia is, and the science behind it, is the first step in changing that.

What Is Dyslexia? The IDA’s 2025 Definition

Dys comes from Greek, meaning difficult. Lexia comes from the Greek lexis, meaning word. Dyslexia: difficulty with words. In 2025, the International Dyslexia Association released its first major update to the definition of dyslexia in over two decades. Here’s what it means.

Dyslexia is a specific learning difference that is neurological in origin, diagnosable, and legally recognized under federal education law. That designation matters because it means your child has rights. As I tell all families I work with, a diagnosis of dyslexia is not a limitation. It is empowering to have the answers to the root causes of your child’s struggle, because with that information, you can chart a path forward.

Dyslexia is characterized by difficulties with word reading and/or spelling involving accuracy, speed, or both. These difficulties persist even when a child is trying hard and receiving good instruction. Dyslexia is not the result of poor teaching, inattention, or lack of effort. It runs in families, and early oral language weaknesses such as difficulty with rhyming, retelling stories, or following verbal directions can signal reading risk before a child ever picks up a book.

The 2025 definition also formally acknowledges what I see every day, especially in older students: dyslexia carries a heavy emotional weight. Anxiety, low self-esteem, and diminished motivation are documented consequences, not of the learning difference itself, but of years spent struggling in environments not built for how their brains work. From my perspective as a dyslexia therapist, the emotional impact is just as important as the academic one.

Dyslexia and the Brain

Dyslexia is not a vision problem, and it has nothing to do with intelligence. It is a difference in how the brain processes language. In a typically developing reader, the left hemisphere language network activates quickly and efficiently. In individuals with dyslexia, this network is underactive. The brain compensates by recruiting alternative pathways, working harder and using slower routes to arrive at the same place. This has been proven extensively using fMRI imaging while individuals, both with and without dyslexia, are reading. While the language network lights up in typically developing readers, this area shows reduced activation in individuals with unremediated dyslexia.

Think of it like a hiking trail. A well-worn path is easy to navigate. A child with dyslexia is taking a less traveled route through the woods. There’s brush, fallen logs, high grass — it takes longer and it is exhausting, even when the destination is the same. That is not a reflection of ability. However, with the right instruction, that new trail gets worn in. Brain imaging research shows that children who receive intensive structured literacy intervention develop measurably stronger activity in the regions that were previously underactive. This is neuroplasticity in action.

Dyslexia Looks Different in Every Child

Some children carry their dyslexia quietly. Others carry it loudly. Some compensate so well that no one notices until third or fourth grade, when demands finally outpace the workarounds. Others reach high school having never been identified and wonder why everything feels so much harder for them than for everyone else. For some students, the weakness in phonological awareness is evident and clear as early as age 5.

This is because dyslexia occurs along a continuum of severity. Evidence shows that nearly every child with dyslexia, no matter where they fall on the spectrum, can learn to read effectively with the right support.

The Strengths That Come with Dyslexia

Dyslexia does not cap a child’s potential. The challenges are real, but so are the strengths. In fact, I call them superpowers with my students.

Many individuals with dyslexia excel in spatial reasoning, big picture thinking, and pattern recognition. These individuals tend to thrive in leadership, architecture, engineering, design, and the sciences.

Verbal expression is often a standout strength, too. I have sat across from children who could verbally create a beautiful story, rich in imagery and vocabulary, but then watched that same child struggle to get a single sentence onto the page. Not because the ideas weren’t there, but because the bridge between them and the page hadn’t been built yet.

And then there is resilience. Children who navigate a world not built for how they learn develop a grit that simply cannot be taught. I often find myself in admiration of the resilience that walks through my door.

Fun Fact: Did you know that individuals with dyslexia are more than twice as likely to become successful entrepreneurs and CEOs? Not despite how they think, but because of it!

Answers to Common Questions from Families

Is dyslexia a learning disability?

Dyslexia is recognized as a specific learning disability under federal law, which means students are entitled to evaluation and support through their school.

Can dyslexia be outgrown?

No, but it can be successfully treated. With structured literacy intervention, most students make significant gains and become capable, confident readers.

How is dyslexia diagnosed?

A comprehensive evaluation assesses phonological awareness, decoding, fluency, spelling, and rapid automatic naming skills.

What kind of instruction does a child with dyslexia need?

Structured literacy: explicit, systematic, multisensory, and cumulative. It is what the research has pointed to for decades. And in my practice, it is what I see work every single day.

Dyslexia Support in Parker, Colorado

At Blue Butterfly Dyslexia Center in Parker, Colorado, I work with students ages 5 through 18 using evidence-based programs including BUILD, Take Flight, and Rite Flight. The right support doesn’t just change how a child reads; it changes how they see themselves.

If you’re wondering whether your child has dyslexia, or you have a diagnosis and aren’t sure where to turn, I’d love to connect. There is a path forward for your child, and I would love to help you find it.

Sincerely,

Samantha

Research Foundation

International Dyslexia Association. (2025). Definition of dyslexia. dyslexiaida.org

Shaywitz, S. & Shaywitz, B. (2020). Overcoming Dyslexia. Knopf.

Eide, B.L. & Eide, F.F. (2011). The Dyslexic Advantage. Hudson Street Press.

Logan, J. (2009). Dyslexic entrepreneurs: The incidence, their coping strategies and their business skills. Dyslexia, 15(4), 328–346.

Duranovic, M., Dedeic, M., & Gavric, M. (2014). Dyslexia and visual-spatial talents. Current Psychology.

Made By Dyslexia & Randstad Enterprise. Intelligence 5.0 Report.

University of California San Francisco. (2020). Children with dyslexia show stronger emotional responses.