Research & Evidence
Building the case for accessibility budget? Here's the evidence your VP needs.
Neurodivergent users experience usability friction earlier and more intensely than neurotypical users. That makes them the most effective early-warning system for bad UX. Every stat below is screenshottable and ready to drop into your next budget proposal.
The Canary in the Coal Mine
Coal miners used canaries to detect toxic gases. The birds' faster metabolism meant they reacted to danger before humans could sense it. The same principle applies to digital products.
Neurodivergent individuals process information differently. People with ADHD may notice inconsistencies in navigation that others gloss over. Autistic users may be disrupted by subtle layout violations that neurotypical users subconsciously compensate for. Dyslexic users will immediately feel the pain of poor typography and low-contrast text.
These aren't edge cases. They're early signals. If your product causes friction for a neurodivergent tester, it's causing friction for a much larger share of your audience — they're just not telling you.
The Friction Detection Pyramid
Neurodivergent Users
Detect friction first
Power Users
Notice issues eventually
Mainstream Users
Bounce silently
The bottom line: If a neurodivergent tester can complete your checkout flow without friction, your mainstream users will breeze through it.
What the Research Shows
Peer-reviewed studies and established guidelines that support the neurodivergent testing model.
Heightened Pattern Recognition
A 2018 study in the Journal of Attention Disorders found adults with ADHD outperformed neurotypical controls on certain pattern recognition tasks. Researchers linked this to increased neural variability in ADHD brains, which may help detect subtle inconsistencies and relationships that others overlook.
Journal of Attention Disorders, 2018
Cognitive Load as an Early Warning System
A 2024 scoping review in the European Journal of Neuroscience examined cognitive load across ADHD, autism, and dyslexia. The findings show that neurodivergent individuals experience measurably higher cognitive load from poorly designed interfaces — making them natural detectors of UX friction that neurotypical users subconsciously compensate for.
Le Cunff et al., European Journal of Neuroscience, 2024
The Canary Effect
Like canaries whose sensitive metabolism detected danger before miners could, neurodivergent users experience usability breakdowns at lower thresholds. What causes mild friction for a typical user causes a total breakdown for a neurodivergent tester — revealing problems before they reach your mainstream audience.
British Psychological Society, 2025
The Curb-Cut Effect in Digital
Wheelchair ramps benefit parents with pushchairs and delivery workers. The same principle applies digitally: interfaces optimised for cognitive accessibility consistently outperform on conversion, engagement, and satisfaction for all users. Designing for the edges improves the centre.
W3C Cognitive Accessibility Guidelines
Scale of Neurodivergence
Between 15 and 20 percent of the global population is neurodivergent. That includes ADHD, dyslexia, autism, dyspraxia, dyscalculia, and Tourette's. If your product doesn't work for neurodivergent users, it doesn't work for up to one in five of your customers.
Doyle, 2020; WHO estimates
The slide that gets your accessibility budget renewed
Accessibility isn't just the right thing to do. These are the numbers that convince finance teams.
$100
return per $1 invested
in accessibility improvements
Forrester, 2024
15%
higher sales
on accessible e-commerce sites
W3C Business Case
30%
lower bounce rates
after accessibility improvements
CNET case study
$13T
market opportunity
people with disabilities + families
Return on Disability, 2024
Regulatory Context
The European Accessibility Act Is Now Enforceable
As of June 28, 2025, the European Accessibility Act (EAA) is enforceable across all EU member states. Any business selling digital products or services to EU consumers must comply — regardless of where the company is headquartered.
The EAA requires websites, mobile apps, and digital tools to meet WCAG-aligned accessibility standards. Non-compliance penalties vary by country, but they are significant.
Fines up to €3 million
Germany: up to €500K. France: €5K–€250K. Spain: €5K–€300K. Products can be removed from market.
75% of top online shops non-compliant
A German study of the most-visited online shops found three-quarters were not accessible. An Irish survey found 72% of household-name brands failed.
ADA lawsuits up 37% in 2025
Over 2,000 ADA web accessibility cases filed in the first half of 2025 alone. Average settlements range from $5K to $350K+ for enterprises.
How this research becomes your competitive advantage
Every feature is designed to capture and quantify the signals that neurodivergent testers naturally produce — so you see what's broken before your users leave.
Emotion Detection
Built on: Cognitive load research
Smart analysis tracks micro-expressions in real time — frustration, confusion, delight — giving you emotion data that maps directly to the cognitive load findings.
Behaviour Tracking
Built on: Pattern recognition studies
Rage clicks, erratic scrolling, navigation loops. The same heightened sensitivity that makes ND testers effective also produces distinctive behavioural signals we capture and analyse.
Smart Reports
Built on: Curb-cut effect + WCAG
Every issue is mapped to WCAG 2.2 criteria and prioritised by severity. Fix what ND testers flag and you improve the experience for all users.