References & Resources

The research behind
everything on this site

Every claim on BrainDifferent is grounded in peer-reviewed research, clinical expertise, and the work of leading specialists in learning differences. Here's where it all comes from.

Key Researchers Full References Organizations Tools & Apps Legal Frameworks

The people behind the science

The information on this site draws on the work of leading researchers and clinicians who have dedicated their careers to understanding learning differences. Their contributions are cited throughout our pages.

MW

Maryanne Wolf

Neuroscientist & Author · Tufts University

One of the world's foremost experts on the reading brain and dyslexia. Her research examines how literacy changes the brain and what goes differently in dyslexic readers.

"Dyslexia is not a disease to be cured. It is simply another way of thinking."
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Sally Shaywitz, MD

Co-Director · Yale Center for Dyslexia & Creativity

Pioneer in dyslexia research. Her neuroimaging studies identified the brain-based nature of dyslexia and established that it is a phonological processing difference, not a vision problem.

"The education system was not designed for the way these children's brains work. But these brains are not broken — they are different."
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Brian Butterworth

Professor Emeritus · University College London

The leading authority on dyscalculia. Butterworth's research established dyscalculia as a genuine neurological condition affecting number sense, distinct from mathematical anxiety or poor teaching.

"Dyscalculia is the numerical equivalent of dyslexia — equally real, equally deserving of support."
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Dr. Cheryl Missiuna

Occupational Therapist & Researcher · McMaster University

A leading researcher in developmental coordination disorder and dysgraphia. Her work focuses on identifying motor-based learning difficulties in children and developing practical interventions.

"Dysgraphia robs a child of the ability to express what they know — not what they think."
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Samuel T. Orton & Anna Gillingham

Founders of Structured Literacy

Orton, a neurologist, and Gillingham, an educator and psychologist, developed the Orton-Gillingham approach in the 1930s — still the gold standard for structured literacy instruction for dyslexic learners.

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Rosmary Neville & Jan Poustie

Dyscalculia Network · United Kingdom

Founders of the Dyscalculia Network, one of the primary UK organizations raising awareness of dyscalculia among educators, parents, and policymakers.


Sources cited across this site

The following references underpin the factual claims, statistics, and descriptions found on our dyslexia, dyscalculia, and dysgraphia pages. Where possible, we link to publicly accessible sources.

1
Overcoming Dyslexia (2nd ed.)
Shaywitz, S. (2020). Overcoming Dyslexia. Vintage Books. — Source for prevalence statistics (1 in 5), phonological processing model, and neuroimaging evidence cited throughout the dyslexia page.
Dyslexia
2
Proust and the Squid: The Story and Science of the Reading Brain
Wolf, M. (2007). Proust and the Squid. Harper Perennial. — Source for the quote cited on the dyslexia page and the description of how the reading brain develops differently in dyslexic individuals.
Dyslexia
3
Reader, Come Home: The Reading Brain in a Digital World
Wolf, M. (2018). Reader, Come Home. Harper. — Extended research on the neuroscience of reading, dyslexia, and cognitive strengths in different reading profiles.
Dyslexia
4
Dyslexia: A Very Short Introduction
Snowling, M. J. (2019). Dyslexia: A Very Short Introduction. Oxford University Press. — Cited for the distinction between dyslexia and vision problems, the spectrum model, and signs by age group.
Dyslexia
5
What is dyslexia? — International Dyslexia Association definition
International Dyslexia Association. (2002, updated 2022). Definition of Dyslexia. Adopted by the IDA Board of Directors. Available at interdys.org — The standard clinical definition referenced on the dyslexia page.
Dyslexia
6
Dyscalculia: From Science to Education
Butterworth, B. (2019). Dyscalculia: From Science to Education. Routledge. — Primary source for the definition of dyscalculia, the number sense deficit model, prevalence estimates (1 in 20), and the quote cited on the dyscalculia page.
Dyscalculia
7
Dyscalculia: Action Plans for Successful Learning in Mathematics
Hannell, G. (2013). Dyscalculia: Action Plans for Successful Learning in Mathematics. Routledge. — Source for descriptions of how dyscalculia affects everyday tasks (money, time, directions) cited in the daily life section.
Dyscalculia
8
The prevalence of dyscalculia — a meta-analysis
Shalev, R. S. (2007). Prevalence of developmental dyscalculia. In D. B. Berch & M. M. M. Mazzocco (Eds.), Why is Math So Hard for Some Children? Brookes. — Source for the co-occurrence statistic with ADHD (~50%) cited on the dyscalculia stats strip.
Dyscalculia
9
Dysgraphia: A Guide for Parents and Teachers
Berninger, V., & Wolf, B. (2009). Dyslexia, Dysgraphia, OWL LD, and Dyscalculia. Paul H. Brookes. — Primary source for the three-type model of dysgraphia (dyslexic, motor, spatial) described on the dysgraphia page.
Dysgraphia
10
Developmental coordination disorder and dysgraphia: signs and symptoms, diagnosis, and rehabilitation
Biotteau, M., Danna, J., Baudou, É. et al. (2019). Neuropsychiatric Disease and Treatment, 15, 1873–1885. — Source for descriptions of motor dysgraphia signs, the impact of OT intervention, and the relationship between fine motor difficulties and written output.
Dysgraphia
11
Handwriting Without Tears — program research base
Olsen, J. Z., & Knapton, E. F. (2008). Handwriting Without Tears: Print Teacher's Guide. Handwriting Without Tears. — Referenced on the dysgraphia support page as an evidence-based handwriting intervention program.
Dysgraphia
12
Co-occurrence of learning disabilities — prevalence and implications
Moll, K., Kunze, S., Neuhoff, N., Bruder, J., & Schulte-Körne, G. (2014). Specific learning disorder: Prevalence and gender differences. PLOS ONE, 9(7). — Source for the statistic that 3 in 4 learning differences co-occur with at least one other, cited on the homepage.
General
13
The dyslexic advantage: spatial and creative cognition
Eide, B. L., & Eide, F. F. (2011). The Dyslexic Advantage. Hudson Street Press. — Source for the sections on dyslexic strengths including 3D spatial thinking, pattern recognition, and narrative ability, cited on the dyslexia strengths section.
Dyslexia
14
DSM-5: Specific Learning Disorder diagnostic criteria
American Psychiatric Association. (2013). Diagnostic and Statistical Manual of Mental Disorders (5th ed.). APA. — The clinical framework referenced implicitly across all three condition pages when describing diagnostic criteria and assessment.
General
15
Individuals with Disabilities Education Act (IDEA)
U.S. Department of Education. (2004). Individuals with Disabilities Education Act, 20 U.S.C. § 1400. — Federal legislation referenced on all three condition pages regarding the right to request a free public school evaluation in the United States.
Legal
16
Section 504 of the Rehabilitation Act of 1973
U.S. Department of Education, Office for Civil Rights. (1973, as amended). Section 504 of the Rehabilitation Act. — Referenced on the dyscalculia and dysgraphia pages as the legislation underpinning accommodation plans (504 Plans) in US schools.
Legal

Where to find further help

These are the organizations referenced across our pages. All are reputable, evidence-based sources of support, advocacy, and professional referrals.

Dyslexia

International Dyslexia Association (IDA)

interdys.org

The leading non-profit in dyslexia research, education, and advocacy. Provides a referral directory for evaluators, tutors, and therapists trained in structured literacy.

Dyslexia

Decoding Dyslexia

decodingdyslexia.net

A grassroots parent-led movement active across all 50 US states. Focuses on improving access to evidence-based literacy instruction and advocating for policy change in schools.

Dyslexia

Yale Center for Dyslexia & Creativity

dyslexia.yale.edu

Research and public education hub led by Drs. Sally and Bennett Shaywitz. Excellent source of research summaries, news, and resources for parents and educators.

Dyscalculia

The Dyscalculia Network

dyscalculia.org.uk

A UK-based organization dedicated to raising awareness of dyscalculia among educators, parents, and policymakers. Provides assessor directories and training resources.

Dyscalculia

Brian Butterworth's Dyscalculia Resources

mathematicalbrain.com

The website of Professor Brian Butterworth, including research papers, assessment tools, and plain-language explanations of dyscalculia for parents and teachers.

Dysgraphia

Handwriting Without Tears

hwtears.com

Evidence-based handwriting and writing curriculum used by occupational therapists and teachers. One of the most widely recommended programs for children with dysgraphia.

General

Learning Disabilities Association of America (LDA)

ldaamerica.org

Broad-based organization covering all specific learning disabilities. Provides research, advocacy support, and a directory of state affiliates for local resources.

General

understood.org

understood.org

A comprehensive digital resource for parents and adults navigating learning and attention differences. Covers dyslexia, dyscalculia, dysgraphia, ADHD, and more with accessible, well-researched content.


Apps and tools mentioned on this site

These tools are referenced in our condition pages as practical aids for people with learning differences. We have no commercial relationship with any of them.

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ModMath

Dyscalculia · iPad app

A free app that replaces graph paper, allowing students to set up and solve math problems digitally — removing the fine motor and spatial demands of written math.

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Livescribe Smart Pen

Dysgraphia · Hardware

Records audio while you write, syncing notes to the recording. Allows students to focus on listening rather than writing while still capturing information.

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Notability

Dysgraphia · iPad app

Digital note-taking app that combines handwriting, typing, and audio recording in one place — ideal for students who need flexible ways to capture information.

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Voice-to-Text (built-in)

Dysgraphia / Dyslexia · All platforms

Native dictation features on iOS, Android, Windows, and macOS allow users to compose text entirely by speaking — a powerful tool for those blocked by handwriting or typing.

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Audiobooks & text-to-speech

Dyslexia · All platforms

Services like Audible, Learning Ally, and built-in text-to-speech on all major devices allow dyslexic readers to access written content through audio.

Grammarly

Dysgraphia / Dyslexia · All platforms

AI-powered writing assistant that catches spelling, grammar, and style issues in real time — a valuable support tool for anyone whose written output doesn't reflect their actual knowledge.


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A note on our sources: BrainDifferent is an educational resource, not a medical or academic publication. We have made every effort to ground our content in reputable, peer-reviewed research and the work of leading specialists. However, this site does not constitute medical or psychological advice. If you have concerns about a learning difference — for yourself or your child — please consult a qualified professional. The organizations listed above are excellent starting points for finding accredited evaluators and specialists in your area.

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