ADHD and Dyslexia: Understanding the Overlap—and Why It Matters

Inspired by Dr. Russell Barkley’s insights into genetics, learning, and targeted intervention

Understanding the ADHD and Dyslexia Overlap

If your child struggles with both attention and reading, you’re not imagining it. The ADHD and dyslexia overlap is real, well-documented, and far more common than many parents and educators realize. Research now shows that these two learning differences frequently co-occur—and when they do, students need dual, targeted support to thrive.

Insights from leading ADHD researcher Dr. Russell Barkley highlight why recognizing this overlap early can change a child’s academic and emotional trajectory.

Why the ADHD and Dyslexia Overlap Is More Than Coincidence

The Genetic Connection Behind the Overlap

Large-scale genetic research has transformed how experts understand learning differences.

A study published in Molecular Psychiatry analyzed data from over 435,000 individuals and identified 49 shared genetic regions linked to both ADHD and dyslexia.

This confirms that the ADHD and dyslexia overlap is not just behavioral or environmental—it is biological. Children with one diagnosis have a significantly higher likelihood of having the other due to shared genetic risk factors.

What this means for families:
If a child has ADHD and continues to struggle with reading despite good instruction, dyslexia should be carefully evaluated—and vice versa.

Shared Challenges, Different Root Causes

The ADHD and dyslexia overlap often shows up as similar classroom struggles, which can confuse parents and teachers.

Common Difficulties Seen in Both Conditions

• Difficulty sustaining attention during reading
• Slow or effortful reading
• Poor reading comprehension
• Trouble following written instructions
• Frustration and avoidance of academic tasks

The Critical Difference

• Dyslexia is rooted in phonological processing—difficulty connecting sounds to letters, decoding words, and building reading fluency.
• ADHD is driven by executive function challenges, including working memory, attention regulation, and task persistence.

A child may appear unfocused while reading, but the underlying reason matters. In cases of ADHD and dyslexia overlap, both mechanisms are at play.

When Attention and Reading Challenges Overlap in School

Students with both ADHD and dyslexia often appear capable but inconsistent. They may understand concepts but struggle to sustain attention during reading, decode efficiently, or complete assignments independently. This combination creates a gap between potential and performance that requires targeted, coordinated support.

Why One Treatment Is Never Enough

The Danger of Treating Only One Diagnosis

One of the biggest risks of ignoring the ADHD and dyslexia overlap is assuming that progress in one area will automatically fix the other. It won’t.

ADHD Support May Include:

• Medication to improve attention and impulse control
• Executive function coaching
• Support with organization, planning, and follow-through

These interventions can dramatically improve focus—but they do not teach reading skills.

Dyslexia Support Must Include:

• Explicit, systematic phonics instruction
• Multisensory reading approaches
• Structured literacy programs such as:
  • Orton-Gillingham
  • Wilson Reading System
  • Fundations
• Targeted phonemic awareness and decoding work

Medication alone does not address dyslexia, even when ADHD symptoms improve.

A Real-World Example of the ADHD and Dyslexia Overlap

Consider a 9-year-old student diagnosed with ADHD. After starting medication, they:

• Sit longer during lessons
• Follow directions more consistently
• Appear calmer during reading time

Yet they still:

• Guess at words
• Struggle to blend sounds
• Avoid reading aloud

This is a classic presentation of ADHD and dyslexia overlap. Improved attention creates readiness for learning—but without structured literacy intervention, reading skills lag behind.

Practical Steps for Parents and Educators

1. Seek Comprehensive Evaluations

If ADHD or dyslexia is suspected, request a full neuropsychological or educational evaluation that assesses:

• Executive functioning
• Attention and working memory
• Language skills
• Phonological processing
• Reading accuracy and fluency

Dual challenges require dual assessment.

2. Use a Layered Intervention Approach

• ADHD: medication + structure + executive function coaching
• Dyslexia: explicit phonics + repetition + multisensory instruction
• ADHD and dyslexia overlap: coordinated support addressing both simultaneously.

3. Advocate for Appropriate School Supports

IEPs and 504 Plans should reflect each diagnosis separately, including:

• Extended time and reduced distractions for ADHD
• Evidence-based reading intervention for dyslexia
• Assistive technology when appropriate

4. Track Progress Separately

Attention improvements and reading gains do not develop at the same pace. Monitor:

• Behavioral and executive function growth
• Reading accuracy, fluency, and comprehension

Final Thoughts on the ADHD and Dyslexia Overlap

Understanding the ADHD and dyslexia overlap is not about labeling—it’s about precision. When families and educators recognize that these are distinct but often connected learning differences, students receive the right tools at the right time.

With targeted support, children with ADHD and dyslexia can build confidence, competence, and long-term academic success.

Watch the original Dr. Russell Barkley video here

Build a Coordinated Academic Support System

When ADHD and dyslexia overlap, support needs to be structured and coordinated. Addressing only one area often leaves gaps in performance. At Themba Tutors, we help students:

• Strengthen executive function and attention systems
• Build reading fluency through structured literacy approaches
• Improve consistency across academic tasks
• Develop systems that support long-term academic performance

Our approach integrates attention support with targeted reading intervention to ensure students can apply what they learn consistently.

Support for Students with ADHD and Dyslexia

At Themba Tutors, we provide:

• ADHD academic support and tutoring
• Dyslexia support and reading intervention
• Executive functioning skills in students
• Time management strategies for students
• How the ADHD brain works differently
• Understanding learning differences in students
• Structured academic support for ADHD and dyslexia