Module 9 — The Dyslexia Questionnaire — Dyslexia in Reading, Spelling and Speed

 

What dyslexia actually is and is not, why it travels with ADHD so often, why adults who read accurately can still be dyslexic, and an honest account of what thirteen self-report questions can and cannot tell you.

 

ADHD Self-Discovery · Part Four — Traveling Companions · 12 min read, about 24 min with the workbook

 

The big idea

 

If you have read the same paragraph three times and still not held it, or written one word four different ways to see which version looks right — this module is for you. It is about a difficulty with reading and spelling that has nothing to do with how clever you are. It is also about a short questionnaire that can point you somewhere useful and cannot do much more than that.

 

Step 1 — The lesson

 

A. What dyslexia is, and what it is not

 

Dyslexia is a difficulty with the written word. Not with thinking. Not with trying.

 

The International Dyslexia Association changed its official definition in October 2025. The new wording calls dyslexia "a specific learning disability characterized by difficulties in word reading and/or spelling that involve accuracy, speed, or both".¹ Notice the word speed. It matters more than almost anything else in this module.

 

Underneath the reading sits a sound layer. To read a new word you have to break it into sounds, hold those sounds in order, and put them back together. That skill is called phonological processing. In dyslexia it runs less smoothly. One careful study gave a full battery of tests to sixteen dyslexic university students and sixteen matched controls. All sixteen of the dyslexic students had a phonological deficit.² Ten also had an auditory deficit, four a motor one, two a visual one. The sound problem was the common thread.

 

Diagram — A · What it is, what it is not. The left column is where dyslexia actually lives. The right column is what people assumed for most of the twentieth century. Reversed letters, in particular, are a myth that will not die.

 

The picture has been sharpened since. When researchers looked directly at the brain, they found that the sound representations in adults with dyslexia were intact. What was hampered was the connection between the areas that hold those sounds and the area that works with them.³ The sounds are there. Getting at them is the hard part.

 

The 2025 definition reflects that shift. It says phonological difficulties are "common but not universal".¹ That is a real change from the older account, and it is honest. Not every dyslexic person has the same profile.

 

Now the part that has cost people the most. Dyslexia is not about intelligence. In one study, 100 Dutch students with a diagnosis of dyslexia were compared with 100 students without. The dyslexic group showed clear deficits in reading, writing and phonological processing. On tests of fluid intelligence there was no significant difference at all.⁴

 

If you were told you were lazy, or careless, or not applying yourself, that was a mistake about wiring dressed up as a judgement about character. A great many adults carry it for thirty years.

 

B. Why a reading questionnaire sits in an ADHD course

 

Because the two turn up together, far more often than chance would allow.

 

A community twin study compared 494 twins with reading disability against 373 without. The reading disability group was significantly more likely to meet criteria for ADHD. Parents and teachers reported similar rates, which tells you the attention problems were not simply frustration in the classroom. Inattention was linked to reading disability in both girls and boys. Hyperactivity was linked only in boys — which the authors suggest is part of why girls get referred less often.⁵

 

Diagram — B · Two that travel together. Reviews and twin studies keep finding the same thing. These are not two unrelated conditions that some unlucky people happen to have at once. They share machinery.

 

How much overlap? A review of seventeen studies published between 2001 and 2011 found a mean comorbidity rate of 45.1 per cent between ADHD and learning disability.⁶ That figure covers learning disability broadly, including writing and maths, not dyslexia alone. The honest summary is that the number moves a great deal depending on who is sampled and how each condition is defined. It is always large.

 

The mechanism is more interesting than the headline. In 457 twin pairs, reading disability was independently linked to weaknesses in phoneme awareness, verbal reasoning and working memory. ADHD was independently linked to a weakness in inhibitory control. The one thing they shared was processing speed — and the twin analysis showed that shared slowness came mostly from genes that raise the risk of both.⁷

 

So the overlap is not a coincidence. There is a common root, and its name is speed.

 

For scale: dyslexia and ADHD each affect roughly five per cent of the population in the United States.⁸ Two common things, sharing genes, showing up together. If you are reading an ADHD course, this questionnaire is not a detour.

 

One practical consequence. Treating one does nothing for the other. Medication that helps attention will not teach anyone to decode. Reading support will not steady an attention system. If both are present, both need addressing, and people are often told otherwise.

 

C. Accuracy comes back. Speed does not.

 

This is the finding that decides whether a questionnaire like this one finds you or misses you.

 

Adults who grew up dyslexic and kept reading anyway tend to get accurate. Years of practice, context, guesswork and sheer stubbornness push word recognition back up towards normal. What does not come back is the speed, and what never comes back is the cost.

 

The Dutch study found exactly this. Apart from spelling, the differences between the dyslexic students and their peers were larger on the speed measures than on the accuracy measures.⁴ These were students who had made it into higher education. They could read. It just took them longer and cost them more.

 

Diagram — C · What recovers and what stays. Spelling is the exception. It tends to stay affected in accuracy terms as well, which is why so many dyslexic adults read reasonably and still dread writing an email in front of someone.

 

Compensation also hides people from research. One study recruited three groups of university students: 31 who reported difficulty learning to read at primary school, 20 with a recent formal diagnosis, and 33 with no reading history. The comparison group outperformed both of the others on almost every measure. The self-report group and the diagnosed group looked broadly alike, differing mainly in reading rate and untimed comprehension. The authors concluded the two recruitment methods were probably sampling the same population, catching people who had built different coping strategies.⁹

 

Hold that next to the questionnaire you are about to take. If the items ask whether you make mistakes, a compensated adult answers no, honestly, and scores low. The thing that would have caught them was never asked: how long did it take, and what did it cost.

 

The cost is real and it lands at work. A systematic review of 33 studies pulled out 318 separate factors affecting the working lives of adults with dyslexia. Nearly every domain of functioning was affected, mostly for the worse, and the impact increased across the course of a working life.¹⁰ Reading a contract, writing a report, taking minutes, filling in a form under time pressure. None of that gets easier with seniority.

 

Adults say it more plainly than researchers do. In a concept-mapping study, 15 dyslexic adults generated 75 statements about living with it, and 39 more sorted and rated them. The nine clusters that came out included "Fear of Disclosure", "Pain, Hurt, and Embarrassment From Past and Present" and "Finding a Good Support System Makes the Difference".¹¹ Fear of disclosure is its own cluster. That tells you what the reading difficulty is wrapped in.

 

D. What the number means, and what it does not

 

Here is everything the live screener will give you back, stated plainly.

 

It has thirteen questions and takes three to five minutes. The total runs from 0 to 65. There are three bands. 0–38 is Low Prevalence of Dyslexia Traits: "You likely experience few to occasional difficulties with reading or writing. Dyslexia is unlikely to be a significant factor in your learning or daily functioning." 39–52 is Moderate Prevalence of Dyslexia Traits: "Your responses suggest recurring challenges with reading, spelling, or written expression that go beyond occasional slips." 53–65 is High Prevalence of Dyslexia Traits: "Your responses suggest persistent, significant challenges with reading, spelling, and written expression."

 

Thirteen questions and a maximum of sixty-five. Divide one by the other and each item can be worth at most five points. The page does not state its scale, so we are not going to state one for it.

 

Diagram — D · What this questionnaire reports. A specification sheet with five blanks is not a broken instrument. It is an honest one, as long as somebody prints the blanks. This is us printing them.

 

This questionnaire was built in-house by New Path. It has no published validation, no normative sample, no reliability figures and no cut-off derived from any research group. The live page names no source. Your total is a raw count of your own answers. It is not standardised and it cannot be compared to a published threshold, because there is no published threshold to compare it to.

 

There is also a problem specific to this subject, and it is a good one. A self-report questionnaire about reading has to be read. If reading is slow and effortful for you, the instrument measuring that fact is being delivered through the exact channel it is asking about. People skim. People misread an item and answer the question they thought it said. Nobody has ever built a good way round this.

 

Even properly built adult screeners miss people. In a study of 74 higher-education students, a commercial computerised adult dyslexia screener picked up 66 per cent of true cases with 90 per cent specificity. A tutor-delivered battery of fifteen subtests caught 91 per cent but flagged more people wrongly, at 79 per cent specificity. Combining the two in a revised two-stage process reached 94 per cent sensitivity and 92 per cent specificity.¹² A validated screener still missed a third of cases on its own. Ours has no sensitivity figure at all.

 

Self-report is not worthless, though, and it is worth saying so. A study of 417 adults used a fifteen-item self-report scale, with 344 of them also taking objective literacy tests. The reading factor from the questionnaire correlated well with measured literacy, and adults who reported dyslexia or worse severity did score lower on the tests. The scale still missed some cases of genuinely low literacy.¹³ That is roughly the right expectation to hold here: real signal, leaky net.

 

One more caution about the word prevalence in those band labels. A large modelling study concluded that the prevalence of dyslexia is best described as a distribution that varies with severity rather than any single number, that groups of poor readers are a mixture, and that dyslexic readers are found across the whole reading spectrum rather than only at the bottom.¹⁴ There is no line in nature for a questionnaire to find.

 

INSIDE THE INSTRUMENT

 

THE DYSLEXIA QUESTIONNAIRE — New Path's own 13-item adult screener

 

Where it came from

 

We could not trace this instrument to any published source, and the live page names none. It was built in-house by New Path. The two best-known short adult dyslexia checklists in circulation are Michael Vinegrad's Adult Dyslexia Checklist, published in Educare in 1994, and the adult checklist associated with Ian Smythe and John Everatt and distributed through the British Dyslexia Association. Neither could be verified against a primary source during the research for this module, and no descent from either could be established. Treat this as an original in-house item set until someone shows otherwise.

 

What it is made of

 

Thirteen items, three to five minutes, a total range of 0 to 65 and three bands: 0–38 Low Prevalence of Dyslexia Traits, 39–52 Moderate Prevalence of Dyslexia Traits, 53–65 High Prevalence of Dyslexia Traits. The response scale is not stated on the live page. Thirteen items and a ceiling of 65 imply five points per item, but that is our arithmetic, not the page's statement, and it is not recorded in the screener master list either. Items cover reading, spelling and written expression by self-report. There are no subscales.

 

How well it performs

 

Unknown. No reliability coefficient, no factor structure, no sensitivity or specificity, no test-retest data. For context on what published adult instruments achieve: in 74 higher-education students, a commercial computerised adult screener reached 66% sensitivity and 90% specificity; a fifteen-subtest tutor-delivered battery reached 91% and 79%; a revised two-stage combination reached 94% and 92%.¹² A 417-adult study of a fifteen-item self-report scale found four factors — Reading, Word Finding, Attention and Hyperactivity — with the Reading factor correlating with measured literacy in the 344 participants who also completed objective tests, while still missing some cases of low literacy.¹³ Those are the benchmarks. This instrument has not been measured against them.

 

Where it was validated

 

Nowhere. There is no validation sample, no normative group, no published paper and no peer review. The bands were set editorially, not derived from a criterion group. This is stated on the module page as well as here, because a reader who only sees the consumer layer should not be left with a different impression from a reader who opens this box.

 

What it cannot do

 

It cannot detect a compensated adult, which is most dyslexic adults who reach higher education or a professional career. Accuracy recovers with practice; speed and effort do not. In 100 Dutch students with dyslexia against 100 controls, effects were larger for speed-related measures than accuracy-related measures on everything except spelling.⁴ A self-report item asking whether you make mistakes will be answered honestly and negatively by exactly the people a timed test would catch.

 

Its delivery channel is the function it is testing. A written self-report questionnaire about reading difficulty asks people with reading difficulty to read thirteen written questions. Misreading an item is not measurement error here, it is arguably the construct. No adult self-report instrument has solved this, and neither has ours.

 

An elevated total is not specific to dyslexia. ADHD, anxiety, low mood, poor or interrupted schooling, English as an additional language, uncorrected vision, hearing loss, traumatic brain injury and simple exhaustion all produce reading complaints. Reading disability and ADHD in particular share a genetically mediated processing-speed weakness in twin data,⁷ so a raised score in an ADHD population is close to expected.

 

"Prevalence of dyslexia traits" is not a prevalence estimate. The band labels use the word in the everyday sense of how much, not the epidemiological sense. Modelling work indicates dyslexia prevalence is better represented as a distribution varying with severity than as any single-point estimate, and that individuals with dyslexia are found across the reading spectrum.¹⁴ No thirteen-item questionnaire locates a boundary that the field does not agree exists.

 

It cannot separate dyslexia from the other specific learning difficulties. Dyscalculia, developmental coordination disorder and developmental language disorder overlap heavily with dyslexia and with each other. This instrument asks about reading, spelling and written expression only.

 

What a clinician does with it

 

Use it as an interview opener, never as a finding. The clinically useful material is the history: age of learning to read, whether reading was ever fluent, spelling in adulthood, how long a page of dense text takes now, what happens when reading aloud, family history, and which strategies are already in place. Ask about time and effort explicitly, because the instrument does not. Where the history is suggestive, the referral is to a psychometric assessment by a qualified assessor — a psychologist or an appropriately certified specialist assessor — covering background history, cognitive ability, oral language, word recognition, decoding, spelling, phonological processing, automaticity and fluency, reading comprehension and vocabulary.¹⁵ That takes hours, it is timed, and it is a wholly different kind of object from a thirteen-item questionnaire.

 

Validity tier: 4 — built in-house by New Path. Honest and useful, not normed, no published validation. The construct is among the best-evidenced in developmental psychology; this particular set of thirteen questions has no evidence behind it at all, and the two claims should not be allowed to borrow from each other.

 

Diagram — E · From a score to an answer. Each stage answers a different question. The first asks whether it is worth looking. Only the third can say what is actually going on, and the fourth is the one that changes your week.

 

STRENGTHS LENS

 

You have been doing a hard thing without being told it was hard.

 

If you are a dyslexic adult who reads accurately now, you did not get there by luck. You built it. Compensation is not a consolation prize, it is a genuine skill set: context reading, pattern guessing, listening harder than everyone else, remembering what was said because writing it down was worse. Those habits transfer. Plenty of dyslexic adults are unusually good at spotting where an argument is going before the sentence ends, because they have been predicting text for thirty years.

 

The research supports that reading of it. Tests of fluid reasoning show no dyslexia effect at all, and verbal reasoning holds up too. The bottleneck sits at the written word, not at thought. Naming the bottleneck accurately is what lets you stop apologising for the whole of yourself and start asking for the one thing you actually need, which is usually time.

 

F. What helps

 

Almost everything useful here is practical rather than therapeutic. Dyslexia does not go away, and it does not need to. What changes is how much of your day it costs you.

 

1. If it matters, get a real assessment rather than a better questionnaire.

 

A full assessment is done by a qualified assessor and covers background history, cognitive ability, oral language, word reading, decoding, spelling, phonological processing, fluency and comprehension. It takes hours, much of it timed. It is what produces a report that a university or an employer will act on. No screener, ours included, does any of that. Ask what it will cost and how long the wait is before you decide.

 

2. Answer the speed question that the questionnaire forgot to ask.

 

Time yourself on one page of dense text. Then ask a colleague to do the same page. If you are accurate but much slower, that is the finding, and it will not appear in any score you get back. Write the two numbers down. They are the single most useful piece of evidence you can walk into an assessment with.

 

3. Ask for time and tools, not sympathy.

 

Text-to-speech for reading, dictation for writing, extra time on anything timed, documents in advance of a meeting, and permission to answer by voice note. Review evidence shows the availability of assistive technology and workplace accommodation is one of the factors that most reliably changes how dyslexic adults get on at work. Name the specific tool. Vague requests get vague answers.

 

4. Deal with the ADHD side separately.

 

The two conditions share a processing-speed weakness but nothing else. Attention treatment will not teach decoding, and reading support will not steady attention. If you suspect both, say so out loud to whoever is assessing you, because being assessed for one and not the other is the most common way people end up with half an explanation.

 

5. Separate the reading difficulty from the shame attached to it.

 

Fear of disclosure comes up as its own theme when dyslexic adults are asked what living with it is like. Decide in advance who needs to know and what you will say, in one sentence, without apology. "I read slowly, so send me the papers the day before" is a workable sentence. It is also the sentence most people spend years not saying.

 

Step 2 — Take the screener

 

Thirteen questions, three to five minutes, free and confidential. You get a total between 0 and 65 and one of three bands. Read section C first if you can: if you learned to read accurately but slowly, this questionnaire is likely to underestimate you, and knowing that in advance is worth more than the score.

 

Take the Dyslexia Questionnaire

 

Before you start

 

This questionnaire was built in-house by New Path. It has no published validation, no normative sample and no peer-reviewed psychometrics, and the live page does not state its response scale, so the total is a raw count of your own answers rather than a standardised score. It is a self-report screen, not a test of reading — nothing here measures how you actually read. Reading complaints are also produced by ADHD, anxiety, low mood, interrupted schooling, uncorrected vision and plain exhaustion, so a high score is a reason to look further and not an answer. Dyslexia is identified through a psychometric assessment by a qualified assessor, and only a clinician can diagnose.

 

Step 3 — Your workbook

 

Your answers save to this device only — we cannot see a word of what you write. This module's workbook collects the one thing the questionnaire never asks about, which is how long reading takes you and what it costs, and turns it into a sentence you could say to an employer or an assessor.

 

Your Dyslexia Questionnaire result

 

Took the screener? Put the number in below. Remember what section D said: this is a raw total from an unvalidated in-house questionnaire, so treat it as a conversation starter. Entirely optional — skip it if you would rather just read.

 

Score bands: 0–38 = Low Prevalence of Dyslexia Traits; 39–52 = Moderate Prevalence of Dyslexia Traits; 53–65 = High Prevalence of Dyslexia Traits

 

Fields: The Dyslexia Questionnaire · 13 items, 3–5 minutes; Total score (0–65); My total (enter 0–65); Anything in the questions that did not fit how it actually is for me

 

The speed question nobody asked

 

Section F, item 2. This is the number the questionnaire cannot collect, and it is the most useful one you can bring to an assessment.

 

Fields: How long one page of dense text takes me; How long it took someone else with the same page; When I read carefully, my accuracy is: Fine, it just takes ages / Patchy, I lose the thread / Poor, I have to reread constantly / Depends entirely on the day; What reading a long document actually costs me afterwards

 

Where it shows up in an ordinary week

 

Section A and section C. Be specific. Not "reading is hard" — the meeting, the form, the message thread.

 

Fields: Three moments this month when reading or writing cost me more than it should; Tick: Spelling is the part I dread most; Tick: Reading aloud in front of people is the part I dread most; What I do instead, so nobody notices

 

What you already built

 

The strengths lens. Compensation is a skill set, not a consolation prize. Write down what you have actually taught yourself.

 

Fields: Strategies I worked out on my own, without anyone teaching me; One thing I am good at that came out of reading the hard way

 

The assessment question

 

Section F, item 1. A questionnaire cannot name anything. This is about deciding whether the real thing is worth pursuing.

 

Fields: Would a formal assessment change anything practical for me?: Yes — I need a report for study or work / Maybe — mostly I want to know / No — I just wanted the explanation / Not sure yet; What I would want the assessment to answer; One thing I need to find out first (cost, wait, who does it)

 

The ask, in one sentence

 

Section F, item 3 and item 5. Time and tools, named specifically. Then decide who actually needs to hear it.

 

Fields: Who I would say it to; The exact sentence; Tick: I want to try text-to-speech or dictation before the next big document

 

Appendix — Research companion

 

Peer-reviewed research

 

8. Boada R, Willcutt EG, Pennington BF (2012). Understanding the comorbidity between dyslexia and attention-deficit/hyperactivity disorder. Topics in Language Disorders, 32(3), 264-284. DOI 10.1097/TLD.0b013e31826203ac. View the paper Review of the comorbidity between dyslexia and ADHD, noting that each condition affects approximately 5 per cent of the population in the United States and that both commonly co-occur with speech sound disorder and language impairment. It sets out the reconceptualisation of both conditions under a multiple deficit model and argues that understanding the overlap informs genetics, brain mechanisms, diagnostic classification and treatment. Limitation: a narrative review rather than a systematic one, with no pooled estimates and no adult-specific data, so the 5 per cent figures are population-level approximations rather than measured rates in any single sample.

 

3. Boets B, Op de Beeck HP, Vandermosten M, Scott SK, Gillebert CR, Mantini D, Bulthe J, Sunaert S, Wouters J, Ghesquiere P (2013). Intact but less accessible phonetic representations in adults with dyslexia. Science, 342(6163), 1251-1254. DOI 10.1126/science.1244333. View the paper Functional MRI study of adults with dyslexia combining multivoxel pattern analysis with functional and structural connectivity analysis. The neural quality of phonetic representations in bilateral primary and secondary auditory cortices was intact in the dyslexic adults, but functional and structural connectivity between those auditory areas and left inferior frontal gyrus was significantly reduced, indicating deficient access to otherwise intact representations. This reframes the phonological account as an access problem rather than a storage problem. Limitation: a single adult imaging sample with no children, no longitudinal data and no test of whether the connectivity difference is a cause or a consequence of decades of reduced reading.

 

4. Callens M, Tops W, Brysbaert M (2012). Cognitive profile of students who enter higher education with an indication of dyslexia. PLoS ONE, 7(6), e38081. DOI 10.1371/journal.pone.0038081. View the paper Compared 100 Dutch-speaking students diagnosed with dyslexia against 100 students without learning disabilities across reading, writing, arithmetic, phonological processing and intelligence measures. Accuracy effect sizes ran between d = 1 and d = 2 for reading and writing, around d = 1 for arithmetic and above d = 0.7 for phonological processing, and except for spelling the deficits were larger on speed-related than accuracy-related measures. The dyslexic students scored slightly lower on crystallised intelligence but showed no significant difference on tests of fluid intelligence. Limitation: a highly selected higher-education sample in a transparent orthography, so both the compensation pattern and the intelligence finding may not generalise to dyslexic adults who did not reach university or who read English.

 

9. Deacon SH, Cook K, Parrila R (2012). Identifying high-functioning dyslexics: is self-report of early reading problems enough?. Annals of Dyslexia, 62(2), 120-134. DOI 10.1007/s11881-012-0068-2. View the paper Compared three groups of university students on standardised reading measures: 31 recruited by self-report of difficulty acquiring reading in elementary school, 20 with a recent formal diagnosis of dyslexia, and 33 reporting no reading acquisition problems. The comparison group outperformed both groups with a reading history on almost all measures, while the self-report and diagnosed groups performed similarly except on untimed reading comprehension and reading rate. The authors concluded the two recruitment methods likely sample the same underlying population but identify people using different adaptive strategies. Limitation: small groups of academically successful university students, so it shows self-report has signal in a compensated population without establishing sensitivity or specificity for any questionnaire.

 

6. DuPaul GJ, Gormley MJ, Laracy SD (2013). Comorbidity of LD and ADHD: implications of DSM-5 for assessment and treatment. Journal of Learning Disabilities, 46(1), 43-51. DOI 10.1177/0022219412464351. View the paper Review of 17 studies published between 2001 and 2011 examining co-occurrence of ADHD and learning disability. The mean comorbidity rate across those studies was 45.1 per cent, higher than rates obtained in earlier reviews, which the authors attribute partly to the inclusion of writing disorders alongside reading and mathematics disabilities. They recommend that academic skill deficits be assessed as part of any ADHD evaluation. Limitation: learning disability here is a broad category rather than dyslexia specifically, the included studies varied widely in how both conditions were defined, and the sample is school-age rather than adult.

 

12. Nichols SA, McLeod JS, Holder RL, McLeod HST (2009). Screening for dyslexia, dyspraxia and Meares-Irlen syndrome in higher education. Dyslexia, 15(1), 42-60. DOI 10.1002/dys.382. View the paper Compared screening approaches in 74 volunteer students at a UK university, testing a tutor-delivered battery of 15 subtests against a commercial computerised adult dyslexia screening test. The tutor battery reached 91 per cent sensitivity and 79 per cent specificity, the commercial screener 66 per cent sensitivity and 90 per cent specificity, and a revised two-stage process combining the commercial screener with four tutor subtests reached 94 per cent sensitivity and 92 per cent specificity. It is a rare published estimate of how much a validated adult dyslexia screener actually misses. Limitation: 74 self-selected higher-education students at one institution, with the criterion standard itself derived from local assessment practice, so the figures are optimistic and may not transfer to general adult populations.

 

2. Ramus F, Rosen S, Dakin SC, Day BL, Castellote JM, White S, Frith U (2003). Theories of developmental dyslexia: insights from a multiple case study of dyslexic adults. Brain, 126(4), 841-865. DOI 10.1093/brain/awg076. View the paper Multiple case study of 16 dyslexic and 16 control university students given a full battery of psychometric, phonological, auditory, visual and cerebellar tests. All 16 dyslexic participants showed a phonological deficit, 10 an auditory deficit, 4 a motor deficit and 2 a visual magnocellular deficit, and in 5 the phonological deficit occurred with no other sensory or motor disorder. The authors conclude the data support the phonological theory while acknowledging additional sensory and motor problems in some individuals. Limitation: 16 highly educated dyslexic adults recruited at university level, so the sample is compensated and small and cannot establish how often each profile occurs in the wider dyslexic population.

 

13. Snowling M, Dawes P, Nash H, Hulme C (2012). Validity of a protocol for adult self-report of dyslexia and related difficulties. Dyslexia, 18(1), 1-15. DOI 10.1002/dys.1432. View the paper Examined whether self-report identifies reading difficulties in adults, using a 15-item questionnaire covering reading skills and ADHD symptoms completed by 417 participants, 344 of whom also took objective literacy tests. Factor analysis produced four dimensions - Reading, Word Finding, Attention and Hyperactivity - and the Reading factor correlated strongly with measured literacy, with adults reporting dyslexia or greater severity scoring lower on the objective tests. Sensitivity was reasonable but the scale still failed to detect some cases of low literacy. Limitation: the protocol was developed and tested largely in parents recruited through family-risk research, self-report was validated against literacy tests rather than against full diagnostic assessment, and the reported misses mean a negative self-report cannot rule dyslexia out.

 

14. Wagner RK, Zirps FA, Edwards AA, Wood SG, Joyner RE, Becker BJ, Liu G, Beal B (2020). The prevalence of dyslexia: a new approach to its estimation. Journal of Learning Disabilities, 53(5), 354-365. DOI 10.1177/0022219420920377. View the paper Model-based meta-analysis and simulation addressing why prevalence estimates for dyslexia vary so widely. Three findings are reported: prevalence is better represented as a distribution varying with severity than as any single-point estimate; samples of poor readers contain more expected poor readers than unexpected or dyslexic readers; and individuals with dyslexia are found across the reading spectrum rather than only in the lower tail. The authors draw out implications for screening, identification and participant recruitment. Limitation: a modelling exercise built on the assumptions of the unexpectedness definition and on existing published correlations, so it constrains how prevalence should be talked about rather than delivering a usable prevalence figure for adults.

 

7. Willcutt EG, Betjemann RS, McGrath LM, Chhabildas NA, Olson RK, DeFries JC, Pennington BF (2010). Etiology and neuropsychology of comorbidity between RD and ADHD: the case for multiple-deficit models. Cortex, 46(10), 1345-1361. DOI 10.1016/j.cortex.2010.06.009. View the paper Analysis of 457 twin pairs from the Colorado Learning Disabilities Research Center study, comparing groups with and without reading disability and ADHD on six cognitive domains and then testing the aetiology of the relationships. Reading disability was independently associated with weaknesses in phoneme awareness, verbal reasoning and working memory; ADHD was independently associated with a heritable weakness in inhibitory control; and the two shared a common deficit in processing speed that twin analyses attributed primarily to common genetic influences. This supports multiple-deficit models rather than a single core deficit for either condition. Limitation: a child and adolescent twin sample of predominantly white, English-speaking participants, and the processing-speed finding is correlational and genetically informative rather than a demonstrated causal pathway.

 

5. Willcutt EG, Pennington BF (2000). Comorbidity of reading disability and attention-deficit/hyperactivity disorder: differences by gender and subtype. Journal of Learning Disabilities, 33(2), 179-191. DOI 10.1177/002221940003300206. View the paper Community twin sample of 494 twins with reading disability (223 girls, 271 boys) and 373 without (189 girls, 184 boys), with ADHD symptoms separated into inattention and hyperactivity-impulsivity. Individuals with reading disability were significantly more likely to meet criteria for ADHD, and parent and teacher reports gave comparable rates, arguing against classroom frustration as the sole explanation. Inattention was associated with reading disability in both girls and boys, whereas hyperactivity-impulsivity was associated only in boys, which the authors link to girls with reading disability being referred for clinical evaluation less often. Limitation: a child and adolescent twin sample identified through school records, so the rates do not transfer directly to adults and no adult follow-up is reported.

 

10. de Beer J, Engels J, Heerkens Y, van der Klink J (2014). Factors influencing work participation of adults with developmental dyslexia: a systematic review. BMC Public Health, 14, 77. DOI 10.1186/1471-2458-14-77. View the paper Systematic review of 33 studies from which 318 factors affecting work participation were extracted and classified using the International Classification of Functioning, Disability and Health. The categories with the highest frequency effect sizes were mental functions such as feelings about dyslexia, activities such as reading and writing, participation factors such as acquiring and keeping a job, social relationships at work, working conditions including availability of assistive technology and accommodations, and personal factors such as self-disclosure and coping. The authors report that dyslexia affects nearly all domains of functioning in the work context, mostly negatively, and that its impact increases over the course of life. Limitation: a qualitative metasummary of heterogeneous studies with no effect sizes for outcomes, no controlled comparisons and considerable variation in how dyslexia was ascertained across the included studies.

 

Clinical frameworks and position statements

 

1. International Dyslexia Association (2025). Definition of dyslexia. International Dyslexia Association, definition adopted by the Board of Directors, 22 October 2025. View the source The current board-adopted definition, which replaced the long-standing earlier wording in October 2025. It defines dyslexia as a specific learning disability characterised by difficulties in word reading and/or spelling involving accuracy, speed, or both, occurring along a continuum of severity and persisting despite instruction effective for peers, and states that underlying phonological and morphological difficulties are common but not universal. It also names reduced psychological well-being and employment opportunities as possible consequences. Limitation: a professional body's consensus statement rather than a study, with no data, no operational thresholds and no guidance on how any of it should be measured.

 

15. International Dyslexia Association (2024). Testing and evaluation. International Dyslexia Association fact sheet, dyslexiaida.org. View the source Practitioner-facing fact sheet describing what a comprehensive evaluation for dyslexia covers: background information, intelligence, oral language skills, word recognition, decoding, spelling, phonological processing, automaticity and fluency skills, reading comprehension and vocabulary knowledge. It distinguishes brief screening tests from full evaluation and states that an initial diagnosis should be offered only as a tentative conclusion based on the data available. It is the clearest short public statement of the gap between a questionnaire and an assessment. Limitation: written primarily around school-age evaluation in a United States service context, with no adult-specific protocol, no timings and no discussion of who is qualified to assess adults outside the school system.

 

Lived experience

 

11. Nalavany BA, Carawan LW, Rennick RA (2011). Psychosocial experiences associated with confirmed and self-identified dyslexia: a participant-driven concept map of adult perspectives. Journal of Learning Disabilities, 44(1), 63-79. DOI 10.1177/0022219410374237. View the source Mixed-method concept mapping study of adults with dyslexia, both formally diagnosed and self-identified. In the first phase 15 adults in focus groups and interviews generated 75 statements about their psychosocial experience; in the second phase 39 adults sorted and rated those statements to produce a concept map with nine clusters, including Fear of Disclosure, Pain, Hurt, and Embarrassment From Past and Present, Being Overwhelmed, Organization Skills for Success and Finding a Good Support System Makes the Difference. The emotional weight participants placed on concealment and past humiliation is as prominent in the map as the practical reading difficulties. Limitation: a small, self-selected, largely North American sample recruited partly through advocacy networks, and concept mapping produces consensus structure rather than prevalence, so no cluster can be read as a rate.

 

Further reading — general background

 

Tamboer P, Vorst HCM, Oort FJ (2014). Identifying dyslexia in adults: an iterative method using the predictive value of item scores and self-report questions. Annals of Dyslexia, 64(1), 34-56. DOI 10.1007/s11881-013-0085-9. View the paper Developed an iterative classification method for identifying dyslexia in a large sample of Dutch students, combining multiple cognitive tests, six independent biographical sources and both discriminant and logistic regression, using sum scores, item scores and self-report questions as predictors. The method classified 74 students as dyslexic and 369 as non-dyslexic, leaving 37 unclassified because predictions were inconsistent. Item scores and self-report questions contributed most to reliable prediction, which is the strongest available argument that self-report questions belong in an adult dyslexia protocol alongside testing rather than instead of it. Limitation: a Dutch university sample in a transparent orthography with no external diagnostic criterion, and 37 of 480 participants could not be classified at all, which is itself a caution about clean cut-offs.

 

Peer-reviewed = checked by independent experts before publication. Clinical model = an established professional framework, not a single study.

 

Up next

 

Module 10 - CAS — Clinical Anger You Can Actually Look At

 

All modules in ADHD Self-Discovery

 

Slow is not the same as struggling. This course was built by clinicians who are part of the New Path family of therapy centers. If you have spent years being told you were careless when you were actually reading against the grain, that is worth saying out loud to someone, and we can talk through what a real assessment would involve. Therapy for clients in California, coaching worldwide, all by telehealth. A conversation costs nothing and there is no pressure. Saving this for later counts too. Talk with the New Path team