When a disability shapes how you write

The mechanism, stated plainly

Two measurements sit under most detectors. Perplexity asks how surprising each word is given the words before it. Burstiness asks how much sentence length and complexity vary across a passage. Text that is predictable and even scores as machine-like.

Now think about how people write under real conditions. A student who was taught a sentence frame and uses it because it works produces regular structure by design. Someone who reuses familiar phrasing to keep the cognitive load down produces low lexical variety. A writer who drafts by dictation tends toward longer, flatter sentences than a typist. A writer who edits obsessively strips out precisely the irregularity a detector reads as human.

No machine is involved in any of that. Every one of them moves the same dials.

What is known here, and what is not

Be precise about this, because precision is what gives you standing in the room. For second-language writers there is a real published measurement. Liang and colleagues, in Patterns in 2023, ran 91 human-written TOEFL essays through seven detectors and found most were misclassified as machine-generated, with 19 flagged by all seven simultaneously.

For disabled and neurodivergent writers, no comparable controlled study exists that we have been able to find. There is a mechanism argument and there are scattered individual cases. There is no rate you can cite the way you can cite Liang.

So do not invent one. The version that survives scrutiny is the mechanical one: the detector scores regularity and predictability, your writing is regular and predictable for a documented reason, and the tool has no way to tell those two apart. 'There is no published study on this yet, and here is why it happens' lands better than a statistic that falls apart when someone looks for it.

Assistive software is where this gets complicated

A line runs between software that helps you produce your own words and software that produces words for you. It runs straight through the tools disabled students are often told to use, and almost nobody is shown where it falls.

• Speech to text writes down what you said. The words are yours. It does tend to produce long, even sentences, which is a detection risk rather than an integrity problem.
• Word prediction offers the next word or two. Still yours, with a shortcut.
• Spelling and grammar correction repairs errors inside your sentence, and your structure survives it.
• Rewrite features hand your sentence to a model and give you its replacement. This is the boundary, and it is the one people cross without noticing, because the button sits next to the spellcheck button.
• Generating text from a prompt produces writing you did not write, whatever led you to reach for it.

Get your accommodation record out first

If a support plan or accommodation letter names a specific piece of software, that document is evidence, and it outranks any explanation you offer afterwards. Retrieve it before you meet anyone.

If the tool was suggested informally by a tutor, a support worker or a disability adviser and never written down, ask them today for something in writing. A short email confirming what they recommended and when is easy for them to send and hard to argue with later.

Whether to disclose

This is a real dilemma and it deserves better than reassurance. Explaining your writing can mean telling an instructor something you had decided to keep private, under pressure, in a week when you have nothing spare.

There is usually a route that does not require it. Disability services already hold your documentation. They can generally confirm to a misconduct process that you are registered and that your accommodations include particular software, without your instructor learning a diagnosis. Ask them to do that instead of writing it out yourself.

If you do decide to say something directly, keep it short and tie it to the writing rather than to you. 'My accommodations include speech to text, which is why the sentences run long and even' does specific work in one line. A broader account of your condition opens a conversation you did not want and still leaves the score unaddressed.

Evidence that fits this situation

• Your support plan or accommodation letter, and anything naming assistive software.
• Appointment records from disability services, the writing centre or a study skills tutor, especially any that mention this assignment.
• Version history. If you dictate, it is unusually good evidence: text arrives in speech-sized runs across sessions, which looks nothing like a paste.
• Work you submitted in earlier terms. Style that is consistent across years is a strong argument that the style is simply yours.
• Any template, scaffold or sentence frame you were taught to use, because it explains the regularity directly.

Where the law actually sits

In the United States, Section 504 of the Rehabilitation Act and the Americans with Disabilities Act require institutions to provide reasonable accommodations. In the United Kingdom, the Equality Act 2010 requires reasonable adjustments. Comparable duties exist across most of the English-speaking world.

What none of those obviously settle is whether a detector-based accusation aimed at writing shaped by a disability is itself discriminatory. We are not aware of settled case law on the question, and pretending a clean legal argument is sitting there would not help you.

The useful route is narrower and far quicker. Ask whether adjustments apply to the misconduct procedure itself: extra time to respond, a support person in the meeting, questions supplied in writing beforehand, a break when you need one. Your disability office knows how your institution handles that, and they can ask on your behalf.

What to do this week

• Contact disability services before you reply to the instructor, not after.
• Retrieve the accommodation letter and any record of assistive software.
• Leave the document alone. Do not edit it and do not run it through a rewriter to bring the number down.
• Ask in writing what the concern rests on, and keep the reply.