Dyslexia

What is Dyslexia?

Dyslexia is a neurodevelopmental difference where the brain's left temporo-parietal region — the 'sound-to-symbol translator' — processes written language through alternative pathways. Affecting 15-20% of people globally with 40-60% heritability, it is one of the most common neurotypes.

1 in 6people affected
17.5%prevalence
Normal IQ range

How does Dyslexia present?

  • Reading slowly with frequent pauses
  • Misspelling common words repeatedly
  • Mixing up left and right directions
  • Mispronouncing long words
  • Writing that drifts across the page

Types of Dyslexia

  • Phonological Dyslexia
  • Surface Dyslexia
  • Rapid Naming Deficit
  • Attentional Dyslexia

Common questions about Dyslexia

Can dyslexia be diagnosed in adults?

Yes. Diagnosis focuses on phonological processing tests, not just reading speed. Adults often develop compensation strategies masking challenges.

Why do some dyslexics read well but spell poorly?

Reading uses context clues, while spelling requires exact recall. Surface dyslexia specifically affects orthographic memory for irregular words.

Content reviewed against DSM-5 criteria and current clinical literature. This page is for educational purposes and does not constitute medical advice. Consult a qualified healthcare professional for diagnosis or treatment.

Dyslexia

Dyslexia

Could this be me?

What actually is it?

Dyslexia is a neurodevelopmental difference where the brain's left temporo-parietal region — the 'sound-to-symbol translator' — processes written language through alternative pathways. Affecting 15-20% of people globally with 40-60% heritability, it is one of the most common neurotypes. The same genes linked to reading challenges often boost spatial reasoning and big-picture thinking.

People Around You

You may meet about 80,000 people in your life.

You may know about ... of them.

Of the people around you, how many might have dyslexia?

Pick the closest guess.

It's a difference in how the brain is wired, not a character flaw.

fMRI studies confirm dyslexia is primarily a phonological processing difference — reduced activation in the left temporo-parietal region — not a visual problem. Letter reversals are a minor symptom, not the cause.

Shaywitz, Overcoming Dyslexia (2003)
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How it looks vs. How it feels

The lived experience behind the observed behavior

Reading slowly with frequent pauses — The Shimmer Effect
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What others see

Reading slowly with frequent pauses

The Shimmer Effect

On the inside

The Shimmer Effect

Letters move, shift, or trade places on the page. My visual processing works differently under sustained focus.

Misspelling common words repeatedly — The Decoding Tax
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What others see

Misspelling common words repeatedly

The Decoding Tax

On the inside

The Decoding Tax

I know how the word sounds, but the letters won't line up in the right order. Spelling costs energy others spend automatically.

Mixing up left and right directions — The Flip Confusion
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What others see

Mixing up left and right directions

The Flip Confusion

On the inside

The Flip Confusion

Left and right have no instinctive meaning. I have to consciously reason through which is which, every single time.

Mispronouncing long words — The Sound Tangle
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What others see

Mispronouncing long words

The Sound Tangle

On the inside

The Sound Tangle

The syllables scramble between my brain and my mouth. I know the word—my tongue just can't sequence it in real time.

Writing that drifts across the page — The Trapped Ideas
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What others see

Writing that drifts across the page

The Trapped Ideas

On the inside

The Trapped Ideas

Complex thoughts flow freely—until I try to write them. The letters won't stay on the line, and my hand can't keep up with my mind.

Neuroimaging reveals structural brain differences — including reduced gray matter in left posterior regions — present from birth, regardless of teaching quality or effort. Dyslexia is a neurodevelopmental variation, not an instructional failure.

Norton et al., Neurobiology of Dyslexia (2015)
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