Speech to Text for Dyslexia and Dysgraphia

Speech to text can help many people with dyslexia or dysgraphia write more, because it lets you compose by voice instead of spelling every word and forming every letter by hand. In the studies we checked, students with learning disabilities who dictated usually produced longer or better texts than when they wrote without help. The evidence is limited, though. The studies are small, most of them older, and one found no difference in length ¹. The software also makes its own kind of mistake, misheard words, so the draft needs checking.

This guide is part of our accessibility and health guides. It covers what the research found, why dictation helps the writing process, where the evidence is weak, how to pair dictation with text to speech, and how to get the support you are entitled to at school and at work.

Dictation separates what you want to say from spelling and handwriting

Writing has two jobs that compete for the same effort: deciding what to say, and getting it onto the page. Deciding takes most of the time. In a 1978 study of business letters, about two-thirds of the time spent composing went to planning, whether the letter was written, dictated or spoken ². Dictation does not shorten the planning. It removes the transcription step, where you choose each spelling, form each letter or find each key, so more of your attention is left for the sentence you are building.

That is why dictation fits dyslexia and dysgraphia well. Dyslexia is a specific learning disorder that concerns reading acquisition, and it can have a lifelong negative impact on the people who have it ³. It is common. A 2022 meta-analysis put the pooled prevalence among primary school children at 7.1 percent worldwide ⁴. The spelling step is the one the recognizer takes over, so the writer can concentrate on the content.

Dysgraphia is the writing counterpart. A 2020 clinical review uses the terms dysgraphia and specific learning disorder in written expression for people whose writing ability does not match their cognitive level and age, even after adequate instruction ⁵. At its broadest, the review says the term covers a wide range of problems: letter formation and legibility, letter spacing, spelling, fine motor coordination, rate of writing, grammar and composition ⁶. The term is defined in our entry on dysgraphia.

Handwriting speed is one reason the difference shows up on the page. In a 1990 study, fourth grade students with learning disabilities who composed by hand averaged 4 to 5 words per minute ⁷. Compiled norms put copying speed at about 16 words per minute by the end of middle school ⁸. These numbers come from different groups and tasks, so read them as a rough scale. The gap suggests that composing by hand runs far below copying speed, because the writer is also planning and spelling while forming each letter.

Speech is faster still. In a controlled study on an iPhone, English text entered by speech reached 153 words per minute ⁹, against 52 words per minute on the built-in keyboard ¹⁰. The study used short phrases in a quiet room, so it does not show what happens with a long document, but the scale of the difference is clear. Whether dyslexia also affects speech output is a separate question, answered on the question about speaking with dyslexia.

Research finds longer, richer writing for many dyslexic students, with mixed results overall

The studies of speech recognition with students who have learning disabilities mostly report gains, but the designs are small and the results do not all point the same way. The table lists the studies we checked, what each compared dictation with, and what it found.

Taken together, most of the results point one way: when students dictate, their writing tends to be longer or better than when they write without help. The 2024 study, for example, found that seven of eight students increased how much they wrote, and the proportion of word-level accuracy was maintained or improved ¹⁵.

The caveats add up, though. Snider found that essay length did not differ significantly across speech recognition, human transcription and keyboarding, so dictation does not guarantee longer text ¹. Raskind and Higgins measured word recognition, spelling and reading comprehension, not essay output, so their result tells you about reading and spelling skills rather than about drafts ¹². Four of the six studies in the table date from 1995 to 2004 ^{11 12 1 17}, and their samples are small. A 2024 study of eight students cannot tell you how a particular student will do.

The chart shows the speed gap between the methods. Each bar comes from a different study and task, so compare the scale, not the exact gaps.

Speed is not the whole story. A draft dictated in one sitting still has to be checked, and that checking is where dyslexic writers can run into trouble. The next section covers the errors that the software makes.

Recognition errors are a new kind of mistake that dyslexic writers must learn to catch

When you type, the mistakes are the ones you make. When you dictate, the software makes its own, and they are not always the spelling mistakes you would expect. In a 2026 qualitative study of four students with dyslexia using speech to text, the most frequent technology-based errors were misrecognized single words and omitted words or parts of sentences ¹⁶. The text can look clean on screen while the meaning has changed, and the writer has to read for meaning rather than for spelling.

The same study found that the recognition accuracy of speech to text appears to affect writing flow and working memory load during technology-based writing ¹⁸. In practice, a writer who has to stop and repair misheard words loses the thread of the sentence. Short chunks are easier to check than a whole page, so dictate in short pieces, check each one, and correct errors as you go.

The early numbers are still a useful benchmark. In a 2004 study, high school students with and without learning disabilities learned to use speech recognition with total word errors under 10 percent ¹⁷. That study used the software of its time, so it does not tell you what your own dictation will achieve. Test your own speech with your own microphone and a short passage before you decide how much to rely on it.

Mac Dictation helps by marking uncertainty. Apple says that Dictation underlines ambiguous text in blue, and its example is "flour" when the speaker meant "flower" ¹⁹. A spellchecker would not catch that kind of error, because both words are spelled correctly. Look for those underlines during your check.

Specialist software gives you more control over recognition. On Dragon for PC, you can add a word or phrase by specifying the word and its spoken form ²⁰. Yale's dyslexia resource says that training words in Dragon strengthens your vocabulary and helps the software work more efficiently ²¹. For more on this, see custom vocabulary and how dictation software learns your voice.

Pair speech to text with text to speech to hear what you wrote

Dictation is good at getting words down, but a draft you have not heard is hard to check. Hearing it read back, one sentence at a time, gives you a second check that does not depend on spelling. This is the reason to pair the two tools.

The research on text to speech is positive, but it is about reading rather than proofreading. A 2018 meta-analysis of text-to-speech and related read-aloud tools for students with reading difficulties found an average weighted effect size of 0.35 on reading comprehension, with a 95 percent confidence interval of 0.14 to 0.56 ²². An effect size of 0.35 is modest. In the sources we checked, we found no study that measures how well students proofread their own dictated drafts with text to speech. The case for pairing the tools is a reasoned one: the reading evidence is positive, and read-back is a cheap way to check a draft.

Two tools can do the read-back:

• Dragon: Dragon's Read That feature reads editable text aloud in a computer voice ²³.
• Mac: Turn on Speak selection in the Read & Speak settings, and the Mac starts speaking the selected text when you use its keyboard shortcut. The default shortcut is Option-Esc ²⁴.

A practical routine for one writing session looks like this:

1. Dictate one paragraph at a time, with the cursor in the document.
2. Select the paragraph and have it read aloud. On a Mac, use the shortcut for Speak selection.
3. Listen for words that sound wrong, and look for any blue underlines that Dictation has added to uncertain words.
4. Correct the misheard words by voice or by keyboard, then move on to the next paragraph.

The routine keeps the writing in short, checkable pieces. For a broader look at proofreading dictated text, see how to proofread dictated text.

Dysgraphia benefits for a different reason: dictation removes the motor work of writing

Dysgraphia is often pictured as messy handwriting, but the older clinical view was narrower. A 2020 review explains that dysgraphia was historically defined as an impairment in the production of written text, usually from a lack of muscle coordination, and that oral spelling was usually preserved ²⁵. If that describes your difficulty, speech removes the hand from the task. You can compose and revise without forming each letter, and the motor cost of writing falls away.

The modern picture is broader. The same review says that at its broadest, dysgraphia covers spelling, grammar and composition as well as letter formation and writing rate ⁶. Dictation helps with the motor part directly, and because the recognizer handles the spelling, it can help with those steps too. Support for grammar and for organizing an argument is a separate need.

Dyslexia and dysgraphia often occur together. The 2020 review reports that, depending on the definitions used, anywhere from 30 to 47 percent of children with writing problems also have reading problems ²⁶. If you or your child has one difficulty, it is worth asking for an assessment of both. The question on the difference between dysgraphia and dyslexia explains how the two differ and how they overlap.

Touch typing is often suggested for dyslexia too. It is a separate skill from dictation, and the evidence for it is weaker than the evidence for dictation, so it is covered in its own question: does touch typing help dyslexia. Our touch typing guide explains how the skill is learned.

Built-in dictation is enough for many writers, and specialist software adds training

Start with the built-in tools. They are enough for many writers. The one thing to plan for on Windows is the internet connection. Microsoft says that to use voice typing on Windows, you need to be connected to the internet, have a working microphone and have your cursor in a text box ²⁷. If you are often offline, check this before you rely on it at school or work. Our guide to voice typing on Windows covers the steps.

On a Mac, the picture is different. Apple says that on a Mac, voice inputs and transcripts for general text Dictation are processed on your device and not sent to Siri servers, and that you can check this in Keyboard settings ²⁸. The steps for turning Dictation on and choosing a shortcut are in how to use dictation on a Mac.

Specialist software such as Dragon includes training. Yale's dyslexia resource says that training words in Dragon strengthens your vocabulary and helps the software work more efficiently ²¹, and advises that when Dragon mishears a word because of the software, you should train the word by repeating it ²⁹. For a comparison of Dragon with other tools, see Dragon NaturallySpeaking.

Yap, which we make, is an on-device dictation app for Mac and Windows. If the built-in tools are not enough for you, you can download it and compare. Start with the free tools either way, because the aim is a routine that works, not a particular app.

Dictation is an accepted accommodation at school, at university and at work

The rules for dictation as an accommodation depend on where you study or work. The information below is general, not legal advice, and it is worth checking your own school, university or employer's process.

In the United States, the federal IDEA regulations require the IEP team to consider whether a child needs assistive technology devices and services ³⁰. If a child has an Individualized Education Program (IEP), the team must consider assistive technology as part of the plan. A student with dyslexia may have a Section 504 plan instead of an IEP. The Section 504 regulations require a school district to provide a free appropriate public education to each qualified student with a disability ³¹, so ask the school which plan applies. Our guide to speech to text for students with disabilities explains how to ask for it.

For exams, the rules are specific to each test. For the digital SAT, the College Board says most students who use a writer or scribe on paper tests will be approved for a writer/scribe or dictation on digital tests ³².

At work, the request is usually called a reasonable accommodation. In the United Kingdom, GOV.UK says employers must make reasonable adjustments so that workers with disabilities or physical or mental health conditions are not substantially disadvantaged in their jobs, and it gives changing equipment as an example ³³. Our guide to dictation as a workplace accommodation covers how to make the request, and the Access to Work scheme can help pay for specialist equipment and assistive software ³⁴.

If you are not sure where to begin, start with the tools you already have. Use the built-in dictation on your device for one week, add the read-back routine above, and keep a note of the errors you catch. That record is useful evidence when you ask a school or employer for formal support, and it shows you whether dictation works for your writing before you buy anything. For more on the physical side of writing, see our guide to typing ergonomics, and for the wider picture of dictation for people with disabilities, see speech to text for accessibility, RSI and disabilities.