Extended Time for ADHD: Fair Accommodation or Unfair Advantage?

Dr. Russell Barkley unpacks the research—and the controversy—around testing accommodations for ADHD

🎓 Introduction: Is Extended Time for ADHD Supportive—or Misleading?

As the school year begins, many parents of students with ADHD ask an important question:

“Can my child receive extended time on tests?”

At first glance, extended time for ADHD feels like a reasonable accommodation. ADHD impacts attention regulation, sustained focus, and executive functioning—skills often required for timed assessments.

But according to leading ADHD researcher Dr. Russell Barkley, this commonly approved accommodation may not always function as intended.

Is extended time for ADHD a fair adjustment—or does it unintentionally provide an academic advantage? Let’s explore what the research actually reveals.

📚 Why Extended Time for ADHD Is Commonly Approved

Extended time is one of the most frequently requested testing accommodations across K–12 schools and colleges. However, the rationale differs by diagnosis.

What the Research Says About Extended Time for ADHD

📖 Miller & Lewandowski (2015)

This influential study examined college students with and without ADHD completing a timed reading comprehension test.

Key findings:

• Under standard time, students with ADHD performed similarly to peers without ADHD
• When given extended time (1.5x–2x), students with ADHD accessed 60%–100% more test items

👉 Conclusion: Extended time for ADHD did not simply remove a barrier—it created a measurable performance advantage.

📚 Harrison, Pollock & Holmes (2022) – Research Review

This comprehensive review evaluated accommodation effectiveness across diagnoses.

Findings:

• A 25% time extension is supported for students with learning disabilities
• For ADHD, no consistent evidence showed extended time improved fairness or validity

📌 The review explicitly recommended against using extended time for ADHD as a default accommodation.

When Extended Time for ADHD Becomes an Unfair Advantage

Accommodations are designed to level the playing field, not tilt it.

If extended time for ADHD improves performance beyond removing a functional barrier, it risks compromising assessment integrity.

Dr. Barkley emphasizes that equity ≠ more time—it means providing the right support for the right challenge.

Smarter Alternatives to Extended Time for ADHD

Instead of automatically approving extended time for ADHD, schools and clinicians should consider evidence-aligned supports, such as:

• Distraction-reduced testing environments
• Scheduled movement breaks
• Use of timers or visual pacing tools
• Fidget tools to support regulation
• Executive function coaching
• Oral responses or keyboarding instead of handwriting

These strategies directly address ADHD-related challenges without inflating performance outcomes.

What Extended Time for ADHD Means for Families

Parents naturally want to give their children every opportunity to succeed. But reframing the goal is key.

Ask:

• Is my child struggling due to anxiety, not ADHD?
• Are careless errors linked to time management, not time limits?
• Would coaching support performance more effectively than extra minutes?

🎯 The goal is not higher scores—it’s accurate demonstration of knowledge.

🎓 Final Takeaway: Accommodate Smarter, Not Longer

The research-backed reality is clear: extended time for ADHD is not always the most effective or equitable accommodation.

Dr. Barkley’s work challenges educators and families to move beyond tradition and toward data-driven decision-making.

At Themba Tutors, we help families navigate these nuances—whether through academic tutoring, executive function coaching, or guidance with IEPs and 504 plans.

Watch the original Dr. Russell Barkley video here

📞 Need Help Navigating ADHD Accommodations?

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