The science of reading for ADHD & dyslexia
Most speed-reading apps were built for one kind of brain. The research says reading works differently for different minds — and Accruva is built on that evidence.
Why most speed-reading apps fail neurodivergent readers
Most speed-reading apps use one technique: Rapid Serial Visual Presentation, or RSVP. Words flash on screen one at a time, as fast as you can tolerate. It feels productive. The numbers go up. And for the average neurotypical adult, the comprehension research is unkind to it.
A 2016 review in Psychological Science in the Public Interest by Rayner and colleagues concluded that traditional speed-reading techniques sacrifice comprehension as speed rises, because they remove saccades — the small eye movements your working memory uses to track meaning across a sentence.
Accruva doesn’t treat RSVP as the answer. It treats it as one of five reading modes, available to readers it actually helps, with four others for the readers and the moments it doesn’t.
What a 2025 study found about RSVP and ADHD reading
In 2025, Moussaoui and colleagues compared comprehension across three reading conditions — full-page, paced highlighting, and RSVP — in adults with ADHD and matched neurotypical controls. The results landed in opposite directions.
| Reading condition | ADHD readers | Neurotypical controls |
|---|---|---|
| Full-page reading | 72% | 65% |
| Paced highlighting | 68% | 64% |
| RSVP (single-word) | 77% | 59% |
Source: Moussaoui et al. (2025). Comprehension accuracy from a single multiple-choice question per passage. Figures rounded.
Read those rows together. For ADHD readers, RSVP produced the highest comprehension of the three conditions, around 7 percentage points above the paced average. For neurotypical readers, RSVP produced the lowest, around 5 points below. The same technique, opposite outcomes — depending on whose brain is reading.
The simplest explanation: single-word presentation strips out the visual surroundings that compete for attention. For brains that are fighting that competition, the strip-out helps. For brains that aren’t, it removes scaffolding they rely on. We covered the full study, including the methodological controls that strengthen it and the limits the authors openly name, in our breakdown of the Moussaoui finding.
This is why Accruva’s Focus (RSVP) mode exists, and why it isn’t the only mode. The product expression of the data is a five-mode system, not a single-mode app shouting about WPM.
Five reading modes. Five evidence-backed principles.
Each Accruva reading mode is built on a different cognitive-science principle, because different material, different goals, and different brains need different tools.
Optimal recognition point (ORP)
Every word has a point, usually slightly left of centre, where the eye naturally fixates fastest. Accruva highlights it, so your eye doesn’t spend effort finding it.
Used in: Focus, Chunking ORPPhrase chunking
Reading happens in phrase-sized groups, not single words. Chunking mode presents text in two-to-four-word groups so fewer eye fixations carry more meaning.
Used in: Chunking Highlight, Chunking ORPGuided visual pacing
External pacing helps regulate speed without removing the surrounding text RSVP throws away. Teleprompter keeps spatial context while highlighting where you are.
Used in: Teleprompter (1 line, 3 lines, 5 lines, full page)Typographic anchoring
Bolding the leading letters of each word gives the eye a steady anchor. The evidence is mixed across the literature, so we offer it as one option among five rather than the answer to everything.
Used in: Bold Flow (3 intensity levels)Self-paced active reading
Not every session is a speed run. Deep comprehension needs the freedom to pause, re-read and annotate. Scroll mode is where you apply what the other four taught you, with position tracking that remembers where you left off in every document.
Used in: ScrollReading research, built into the accessibility settings.
Around 5 to 6% of adults have ADHD and a similar proportion are dyslexic (Faraone et al., 2021). Most reading apps treat that as an edge case. We treated it as the design brief.
For ADHD readers
The Moussaoui study above is the heart of this. The same technique that strips comprehension from neurotypical reading appears to help ADHD attention by removing visual competition. Accruva pairs that finding with a dedicated ADHD/Zen accessibility setting: dark screen, single-word focus, hidden controls.
In the app: Focus mode + ADHD/Zen setting (free)For dyslexic readers
The Dyslexia Font toggle switches to Atkinson Hyperlegible — designed by the Braille Institute for character disambiguation — with letter spacing 2.5, word spacing 4.0 and line height 2.0. Chunking and Bold Flow give two more ways to soften visual crowding before you even reach RSVP.
In the app: Dyslexia Font + Chunking + Bold Flow (free)What we won’t tell you
Reading apps in this category have a long, ugly history of overclaiming. We’d rather lose a sale than tell you something the evidence doesn’t support.
Accruva isn’t a clinical product
We’re a reading app. We don’t diagnose or treat ADHD, dyslexia, or anything else. We implement techniques the literature supports; the app itself hasn’t been through a clinical trial.
No 1,000-WPM miracles
The Rayner 2016 review is honest about what happens to comprehension at extreme speeds. We agree with it. Accruva caps free at 400 WPM and Pro at 1,000 WPM, both well above the research average of 238 WPM for non-fiction.
The Moussaoui sample is undergraduates
The 2025 ADHD study was 86 university students at one Canadian institution. Strong methodology, modest sample. It’s the best ADHD-specific RSVP evidence we have; it’s not the last word.
Bold Flow evidence is mixed
Bionic-style typography has noisy results across studies. Some readers find it genuinely helps; others find no effect. We offer it as one mode among five, not as a marquee claim.
The science behind Accruva, in plain English.
Honest answers about reading research, ADHD, dyslexia, and what the evidence actually says.
Is speed reading scientifically debunked?
Does RSVP reading help people with ADHD?
What font does Accruva use for dyslexic readers?
What’s the average adult reading speed?
Has Accruva been clinically tested?
What spaced repetition algorithm does Accruva use?
The science isn’t the point. Reading better is.
Five modes built on five different findings, with every accessibility feature free. Read it the way your brain prefers.
Accruva is a reading tool, not a medical product. It doesn’t diagnose or treat ADHD, dyslexia, or any condition.
