Dyslexia Screener or Diagnostic Dyslexia Assessment?

Emma Stokes
Aug 6, 2025
2 min read

A guide for parents, adults, and educators

🔍 What’s the Difference Between a Screener and an Assessment?

When it comes to understanding dyslexia, both screening and diagnostic assessment have a role — but they do very different things.

Let’s break it down.

🧪 What Is a Dyslexia Screener?

A dyslexia screener is a preliminary tool used to identify whether someone may show traits consistent with dyslexia. It’s:

✅ Quick (often completed in under an hour)
✅ Can be used with children, teens, and adults
✅ Gives an indication of likelihood
✅ Helps decide whether further investigation is needed

But:

❌ It does not give a diagnosis
❌ It can't be used for formal exam access arrangements or funding

Think of it like a health check — useful and informative, but not a full diagnosis.

🧾 What Is a Diagnostic Dyslexia Assessment?

A full diagnostic assessment is a comprehensive evaluation carried out by a qualified specialist assessor (holding an APC or equivalent). It includes:

A detailed background history
A full range of standardised tests (reading, spelling, phonological awareness, memory, processing speed)
Analysis of strengths and differences
A formal diagnosis (if criteria are met)
Detailed written report with tailored recommendations

It’s typically used to:

Support formal identification of dyslexia
Inform teaching or workplace adjustments
Apply for Disabled Students' Allowance (DSA) or exam access arrangements
Provide clear next steps for support and intervention

🤔 So, Which One Do I Need?

Here’s a quick comparison:

Feature	Screener	Diagnostic Assessment
Time	Short (30–60 mins)	2–3 hours (plus report writing)
Purpose	Identifies likelihood of dyslexia	Provides a formal diagnosis
Professional required	Trained practitioner	Specialist teacher assessor with APC
Legal status	Not legally recognised for adjustments	Accepted for DSA, exams, and workplace support
Cost	Lower cost	Higher cost (reflecting time and qualifications)
Outcome	Likely / unlikely result	Formal identification with recommendations

💡 When to Consider a Screener:

You’re noticing signs and want to explore further
You want an indication before deciding on a full assessment
You’re not yet ready to commit financially or emotionally

🧭 When to Consider a Full Diagnostic Assessment:

You're seeking formal recognition of dyslexia
You need the report for school, college, university, or work
You want detailed support recommendations tailored to your needs

📌 Final Thoughts

Both tools have value — and the right choice depends on your goals.

A screener can guide the way, but a diagnostic assessment is the only way to confirm dyslexia formally.

If you're unsure, I offer a free initial call to help you decide what’s most appropriate for your situation — whether you're a parent, educator, or adult exploring your own learning profile.