What a neurodivergent assessor notices that an automated tool cannot

Automated accessibility testing tools are good at what they do. axe DevTools can scan a page in seconds and flag missing alt text, broken ARIA attributes, and contrast failures. WAVE can highlight structural issues. Siteimprove can crawl an entire site and produce a compliance report overnight.

None of them can tell you that the product makes you want to close the tab after three minutes.

The things that do not show up in a scan

The feeling of being overwhelmed before you start. A dashboard with twelve panels is not an accessibility violation. It is a cognitive assault. An automated tool counts elements. It does not experience the paralysis of not knowing where to look first. A neurodivergent assessor opens the product and immediately knows whether the first screen gives them a path forward or leaves them stranded.

The micro-frustrations that compound. A form that clears your input when you click away from a field. A dropdown that closes if your mouse drifts two pixels outside the boundary. A loading spinner with no indication of how long you will wait. Each one is trivial in isolation. Together, they drain your capacity to keep going. An assessor with ADHD does not need to be told these are problems. They have abandoned products for exactly these reasons.

The sensory texture of the experience. Some products feel heavy. Dense. Claustrophobic. Others feel sharp, with too-bright colours and too-much contrast creating visual tension. Others feel chaotic, with elements competing for attention like people shouting in a crowded room. These are not things you can measure with a contrast checker. They are experienced, and they matter.

The emotional cost of error states. An automated tool can check whether an error message exists. It cannot tell you whether the message makes you feel stupid. "Invalid input" is technically informative. Emotionally, it is a small punch. For someone with rejection sensitive dysphoria, it registers as failure. A neurodivergent assessor reads that message and feels the flinch. That flinch is data.

The executive function tax. A multi-step process with no save button. A form that does not remember your progress. A settings page where you have to redo your preferences every time you log in. These are not accessibility violations under WCAG. They are barriers to task completion for anyone whose executive function is already working at capacity. An assessor with ADHD knows exactly how it feels to lose twenty minutes of work because the product did not save when you switched tabs.

What the assessment actually looks like

An NDC assessment is not a checklist exercise. The assessor uses the product as a real user would. They complete key task flows: onboarding, core tasks, settings, help. They note where they stumble, where they hesitate, where they feel frustrated, and where the product supports them well.

They test with assistive technologies: NVDA, JAWS, VoiceOver, TalkBack. They test keyboard-only navigation. They test at 400% zoom. They test with prefers-reduced-motion enabled. But the most valuable part of the assessment is the part no tool can replicate: a neurodivergent person using the product and reporting what the experience is actually like.

That is not subjective. It is user research. It is the most direct, unfiltered signal you can get about whether your product works for the people it is supposed to serve.

Why it matters that the assessor is neurodivergent

A neurotypical accessibility consultant can learn the WCAG criteria, run the tools, and produce a technically accurate report. What they cannot do is experience the product the way a neurodivergent user does. They cannot feel the cognitive overload. They cannot notice the sensory accumulation. They cannot register the emotional flinch at a poorly worded error message.

Lived experience is not a substitute for technical expertise. It is an additional dimension of testing that no tool, no guideline, and no neurotypical reviewer can replicate. That is why every NDC assessor is neurodivergent. Not as a marketing position. As a methodology.

The Neurodiversity Design Council is the UK's first standards body for neurodiversity-inclusive digital design. Read the full standard or submit your product for assessment.