Dyslexia

What Is Dyslexia?

Dyslexia is a specific learning difference that primarily affects reading, spelling, and writing, particularly accurate and fluent word reading. These challenges are linked to differences in how the brain processes language, including phonological processing. 

Dyslexia is neurobiologically based, often runs in families, and is lifelong. It reflects differences in how the brain develops and functions, particularly within the networks involved in reading and learning language. Its presentation may change over time as individuals develop and the demands of learning, education, work and everyday life change.

Research also identifies differences in other areas that may contribute to an individual’s dyslexic profile, including visual and attentional processing, temporal processing, working memory, processing speed, orthographic skills and the development of automaticity. These differences vary between individuals and may affect the speed, coordination and fluency with which some tasks are performed.

Dyslexia occurs across all languages, although its effects on learning may vary depending on the structure and writing system of each language. It can also affect learning in other academic areas, including written expression, mathematics, science and additional languages. 

Early indicators of dyslexia can emerge before formal reading instruction begins. Difficulties in oral language, phonological awareness, rapid naming, and letter knowledge may indicate an increased risk of later reading and spelling difficulties, particularly when there is a family history of dyslexia. Recognising these indicators early can support timely identification and intervention, providing children with appropriate support before difficulties become more established. 

Dyslexia exists on a continuum and is experienced differently by each individual. Each person presents a unique profile of strengths and challenges, influenced by the interaction of genetic, neurobiological, and environmental factors, as well as educational experiences and the nature and timing of support received.

Dyslexia frequently co-occurs with other developmental differences, including Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD), Developmental Language Disorder (DLD), Dyscalculia and Developmental Coordination Disorder (DCD). These co-occurring differences can contribute to each individual’s unique learning profile and support needs.

Dyslexia occurs across a wide range of intellectual abilities. Its characteristic difficulties are not the result of low effort or motivation and can persist despite effective reading instruction. However, an individual’s experience and outcomes can be influenced by motivation, opportunity, the learning environment, and the nature, timing, and appropriateness of the support received. 

Early identification and appropriate intervention can make an important difference to longer-term learning and development. Effective support is structured, evidence-based and responsive to individual learning needs, supporting the development of accurate and fluent reading, spelling and broader language and learning skills. Individuals with dyslexia deserve access to appropriate and timely teaching, support and encouragement that enables them to learn successfully, develop their strengths and thrive academically and beyond. 

The experience of dyslexia can extend beyond academic learning. Persistent difficulties, particularly when they are unidentified, misunderstood or inadequately supported, may affect confidence, self-esteem, motivation, emotional wellbeing and an individual’s sense of belonging. Positive relationships, appropriate support and environments that recognise both strengths and challenges can support the development of self-understanding, self-advocacy, resilience and confidence.

At the same time, dyslexia reflects a different way of thinking. Many individuals with dyslexia demonstrate strengths in areas such as visual and spatial reasoning, creativity, problem-solving and big-picture thinking. At DAS, we believe dyslexia is something to be understood, valued and embraced as part of a different kind of mind.

 Updated as of 8 October 2026

Learn more from our experts… What is Dyslexia? 

We have a series of videos on Dyslexia on our YouTube Channel.

DAS Dyslexia Definition – Reference List 

Authoritative Definitions & Policy

American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). https://doi.org/10.1176/appi.books.978089042559

British Dyslexia Association. (n.d.). What is dyslexia? British Dyslexia Association: What is Dyslexia? 

Carroll, J. M., Holden, C., Kirby, P., Thompson, P. A., & Snowling, M. J., & Dyslexia Delphi Panel. (2025). Toward a consensus on dyslexia: findings from a Delphi study. J Child Psychol Psychiatr. 66(7), 1065-1076.  https://doi.org/10.1111/jcpp.14123

Holden, C., Kirby, P., Snowling, M. J., Thompson, P. A., & Carroll, J. M. (2025). Towards a Consensus for Dyslexia Practice: Findings of a Delphi Study on Assessment and Identification. Dyslexia, 31: e1800.https://doi.org/10.1002/dys.1800

International Dyslexia Association. (2025). Definition of dyslexia. International Dyslexia Association: Definition of Dyslexia 

Peterson, R. L., & Pennington, B. F. (2015). Developmental dyslexia. Annual Review of Clinical Psychology, 11, 283–307. https://doi.org/10.1146/annurev-clinpsy-032814-112842

Rose, J. (2009). Identifying and teaching children and young people with dyslexia and literacy difficulties. https://dera.ioe.ac.uk/id/eprint/14790/

Neuroscience & Brain Research (Shaywitz & beyond)

Gabrieli, J. D. E. (2009). Dyslexia: A new synergy between education and cognitive neuroscience. Science, 325(5938), 280–283. https://doi.org/10.1126/science.1171999

Pennington, B. F. (2006). From single to multiple deficit models of developmental disorders. Cognition, 101(2), 385–413. https://doi.org/10.1016/j.cognition.2006.04.008

Pugh, K. R., et al. (2000). Functional neuroimaging studies of reading and reading disability. Journal of Communication Disorders, 33(6), 479–492. https://doi.org/10.1016/S0021-9924(00)00024-7

Shaywitz, S. E. (2003). Overcoming dyslexia: A new and complete science-based program for reading problems at any level. Knopf.

Shaywitz, S. E., & Shaywitz, B. A. (2005). Dyslexia (specific reading disability). Biological Psychiatry, 57(11), 1301–1309. https://doi.org/10.1016/j.biopsych.2005.01.043

Shaywitz, B. A., Shaywitz, S. E., Pugh, K. R., Mencl, W. E., Fulbright, R. K., Skudlarski, P., Constable, R. T., Marchione, K. E., Fletcher, J. M., Lyon, G. R., & Gore, J. C. (2002). Disruption of posterior brain systems for reading in children with developmental dyslexia. Biological Psychiatry, 52(2), 101–110. https://doi.org/10.1016/S0006-3223(02)01365-3

Genetics / Heritability (often runs in families)

Erbeli, F., Rice, M., Paracchini, S., & Smith, S. D. (2022). Insights into dyslexia genetics research from the last two decades. Brain Sciences, 12(1), Article 27. https://pmc.ncbi.nlm.nih.gov/articles/PMC8773624/

Reid, G. (2016). Dyslexia: A complete guide for parents and those who help them (2nd ed.). Wiley-Blackwell.

Cognitive & Developmental Perspectives (Fawcett, Nicolson)

Fawcett, A. J., & Nicolson, R. I. (2004). Dyslexia: The role of the cerebellum. Psychology Press.

Nicolson, R. I., & Fawcett, A. J. (2008). Dyslexia, learning, and the brain. MIT Press.

Nicolson, R. I., & Fawcett, A. J. (1990). Automaticity: A new framework for dyslexia research? Cognition, 35(2), 159–182. https://doi.org/10.1016/0010-0277(90)90013-A

Nicolson, R. I., & Fawcett, A. J. (2007). Procedural learning difficulties: Reuniting the developmental disorders? Trends in Neurosciences, 30(4), 135–141. https://doi.org/10.1016/j.tins.2007.02.003

Phonological Processing (Core Foundation)

Hulme, C., & Snowling, M. J. (2016). Reading disorders and dyslexia. Current Opinion in Pediatrics, 28(6), 731–735. https://doi.org/10.1097/MOP.000000000000041

Snowling, M. J. (2000). Dyslexia (2nd ed.). Blackwell.

Snowling, M. J., & Hulme, C. (2012). Interventions for children’s language and literacy difficulties. International Journal of Language & Communication Disorders, 47(1), 27–34. https://doi.org/10.1111/j.1460-6984.2011.00081.x

Stanovich, K. E. (1988). Explaining the differences between the dyslexic and the garden-variety poor reader. Journal of Learning Disabilities, 21(10), 590–604. https://doi.org/10.1177/002221948802101003

Vellutino, F. R., Fletcher, J. M., Snowling, M. J., & Scanlon, D. M. (2004). Specific reading disability (dyslexia): What have we learned in the past four decades? Journal of Child Psychology and Psychiatry, 45(1), 2–40. https://doi.org/10.1046/j.0021-9630.2003.00305.x

Visual Processing & Magnocellular Theory

Stein, J. (2014). Dyslexia: The role of vision and visual attention. Current Developmental Disorders Reports, 1(4), 267–280. https://doi.org/10.1007/s40474-014-0030-6

Stein, J. (2018). What is developmental dyslexia? Brain Sciences, 8(2), Article 26. https://doi.org/10.3390/brainsci8020026

Stein, J. (2019). The current status of the magnocellular theory of developmental dyslexia. Neuropsychologia, 130, 66–77. https://doi.org/10.1016/j.neuropsychologia.2018.03.022

Stein, J. (2025). Visual dyslexia. Current Developmental Disorders Reports, 12, Article 5. https://doi.org/10.1007/s40474-025-00316-3

Stein, J. (2019). The current status of the magnocellular theory of developmental dyslexia. Neuropsychologia, 130, 66–77. https://doi.org/10.1016/j.neuropsychologia.2018.03.022

Stein, J., & Walsh, V. (1997). To see but not to read: The magnocellular theory of dyslexia. Trends in Neurosciences, 20(4), 147–152. https://doi.org/10.1016/S0166-2236(96)01005-3

Vidyasagar, T. R., & Pammer, K. (2010). Dyslexia: A deficit in visuo-spatial attention. Trends in Cognitive Sciences, 14(2), 57–63. https://doi.org/10.1016/j.tics.2009.12.004

Processing Speed, Memory, Multiple Deficit Models, Orthography

Baddeley, A. (2003). Working memory and language: An overview. Journal of Communication Disorders, 36(3), 189–208. https://doi.org/10.1016/S0021-9924(03)00019-4

Georgiou, G. K., Martinez, D., Vieira, A. P. A., & Guo, K. (2021). Is orthographic knowledge a strength or a weakness in individuals with dyslexia? Evidence from a meta-analysis. Annals of Dyslexia, 71, 5–27. https://doi.org/10.1007/s11881-021-00220-6

Pennington, B. F. (2006). From single to multiple deficit models of dyslexia. Cognition, 101(2), 385–413. https://doi.org/10.1016/j.cognition.2006.04.008

Wolf, M., & Bowers, P. G. (1999). The double-deficit hypothesis. Journal of Educational Psychology, 91(3), 415–438. https://doi.org/10.1037/0022-0663.91.3.415

Early Identification and Early Intervention

Hulme, C., Nash, H. M., Gooch, D., Lervåg, A., & Snowling, M. J. (2015). The foundations of literacy development in children at familial risk of dyslexia. Psychological Science, 26(12), 1877–1886. https://doi.org/10.1177/0956797615603702

Lyytinen, H., Erskine, J., Hämäläinen, J., Torppa, M., & Ronimus, M. (2015). Dyslexia: Early identification and prevention: Highlights from the Jyväskylä Longitudinal Study of Dyslexia. Current Developmental Disorders Reports, 2(4), 330–338. https://doi.org/10.1007/s40474-015-0067-1

Snowling, M. J., & Melby-Lervåg, M. (2016). Oral language deficits in familial dyslexia: A meta-analysis and review. Psychological Bulletin, 142(5), 498–545. https://doi.org/10.1037/bul0000037

Torgesen, J. K., Alexander, A. W., Wagner, R. K., Rashotte, C. A., Voeller, K. K. S., & Conway, T. (2001). Intensive remedial instruction for children with severe reading disabilities: Immediate and long-term outcomes from two instructional approaches. Journal of Learning Disabilities, 34(1), 33–58, 78. https://doi.org/10.1177/002221940103400104

Evidence-based Support (phonologic – Science of Reading)

National Institute of Child Health and Human Development. (2000). Report of the National Reading Panel. Teaching children to read: An evidence-based assessment of the scientific research literature on reading and its implications for reading instruction (NIH Publication No. 00-4769). Washington, DC: U.S. Government Printing Office. 

Castles, A., Rastle, K., & Nation, K. (2018). Ending the reading wars: Reading acquisition from novice to expert. Psychological Science in the Public Interest, 19(1), 5–51. https://doi.org/10.1177/1529100618772271

Snowling, M. J., & Hulme, C. (2011).  Evidence-based interventions for reading and language difficulties: Creating a virtuous circle. British Journal of Educational Psychology, 81(1), 1–23. https://doi.org/10.1111/j.2044-8279.2010.02014.x

Rose, J. (2009). Identifying and teaching children and young people with dyslexia and literacy difficulties. https://dera.ioe.ac.uk/id/eprint/14790/

Strengths-Based Perspectives

Eide, B. L., & Eide, F. F. (2011). The dyslexic advantage. Hudson Street Press.

Everatt, J., Steffert, B., & Smythe, I. (1999).An eye for the unusual: Creative thinking in dyslexics. Dyslexia, 5(1), 28–46. https://doi.org/10.1002/(SICI)1099-0909(199903)5:1

Hewes, D. (2020). Entrepreneurs with dyslexia in Singapore: The incidence, their educational experiences, and their unique attributes. Asia Pacific Journal of Developmental Differences, 7(2).  https://das.org.sg/wp-content/uploads/2023/10/APJDD-7-2-2020-HEWES.pdf

Lam, J. H. Y., & Tong, S. X. (2021). Drawing a new picture: Children with developmental dyslexia exhibit superior nonverbal creativity. Research in Developmental Disabilities, 116, 104036. https://doi.org/10.1016/j.ridd.2021.104036

Logan, J. (2009). Dyslexic entrepreneurs: The incidence; their coping strategies, and their business skills. Dyslexia, 15(4), 328–346. https://doi.org/10.1002/dys.388

Made By Dyslexia. (n.d.). Dyslexic thinking. https://www.madebydyslexia.org

Taylor, H., & Vestergaard, M. D. (2022). Developmental dyslexia: Disorder or specialization in exploration? Frontiers in Psychology, 13, 889245. https://doi.org/10.3389/fpsyg.2022.889245 

Von Károlyi, C. (2001). Visual-spatial strength in dyslexia: Rapid discrimination of impossible figures. Journal of Learning Disabilities, 34(4), 380–391. https://doi.org/10.1177/002221940103400408

West, T. G. (1997). In the mind’s eye: Visual thinkers, gifted people with dyslexia and other learning difficulties. Prometheus Books.

Social-Emotional Wellbeing, Inclusion & Rights 

Gibby-Leversuch, R., Hartwell, B. K., & Wright, S. (2021). Dyslexia, literacy difficulties and the self-perceptions of children and young people: A systematic review. Current Psychology, 40, 5595–5612. https://doi.org/10.1007/s12144-019-00444-1 Springer

Wilmot, A., Pizzey, H., Leitão, S., Hasking, P., & Boyes, M. (2023). Growing up with dyslexia: Child and parent perspectives on school struggles, self-esteem, and mental health. Dyslexia, 29(1), 40–54. https://doi.org/10.1002/dys.172

Wilmot, A., Pizzey, H., Leitão, S., Hasking, P., & Boyes, M. (2023). “I struggle at times to see her struggle”: Mothers’ perspectives on dyslexia-related school struggles and the inter-connected nature of mother and child well-being. Dyslexia, 29(2), 136–150. https://doi.org/10.1002/dys.1733 PubMed

United Nations. (2006). Convention on the Rights of Persons with Disabilities. Article 24: Education United Nations. https://www.un.org/development/desa/disabilities/convention-on-the-rights-of-persons-with-%20disabilities/article-24-education.html

United Nations Educational, Scientific and Cultural Organization. (2017). A guide for ensuring inclusion and equity in education. UNESCO. https://doi.org/10.54675/MHHZ2237 UNESCO Documentation

United Nations Educational, Scientific and Cultural Organization, & Right to Education Initiative. (2019). Right to education handbook. UNESCO. https://doi.org/10.54675/ZMNJ2648 UNESCO Documentation

Understanding Your Dyslexia.
What does it mean?

Your brain learns and works with words and language in a different way. 

You might find reading, spelling or writing harder than some other children. Words can take longer to read, spelling can be tricky, and sometimes you might know exactly what you want to say but find it hard to get your ideas onto paper.

This has nothing to do with how clever you are. Your brain simply works with words and language differently.

Everyone with dyslexia is different. You will have things you find difficult and things you are good at. You might enjoy solving problems, creating things, seeing pictures in your mind, telling stories, helping people, or something completely different. Your strengths and interests are part of what makes you, you.  

Sometimes learning can feel frustrating, especially when other people don’t understand why something is difficult for you. You deserve teachers and grown-ups who understand how you learn and help you find ways that work for you.

Dyslexia will always be part of the way you learn, but that doesn’t mean learning will always feel as hard as it does today. With good teaching, support, practice and helpful tools, you can become a stronger and more confident learner.

Dyslexia is one part of you.

  • You have your own challenges.
  • You have your own strengths.
  • You have your own interests and dreams.

You learn differently. And at DAS, we think that’s something to understand, support and embrace.

Updated as of 8 October 2026

Understanding Your Child’s Dyslexia.

Dyslexia is a lifelong learning difference that mainly affects reading, spelling and writing. It is linked to differences in how the brain processes language, which can make learning to read accurately and fluently, remembering spelling and expressing ideas in writing more difficult.

Dyslexia often runs in families. If a parent, sibling or other close family member has dyslexia or has experienced similar difficulties with reading and spelling, a child may be more likely to have dyslexia too. Recognising the signs early is important because early identification and appropriate intervention can make a significant difference to a child’s learning and longer-term development.

Every child with dyslexia is different. Your child will have their own pattern of strengths and challenges, and the way dyslexia affects them may change as they grow and the demands of school, further education and eventually work change.

Dyslexia is not caused by low intelligence, lack of effort or poor motivation. Children with dyslexia may continue to experience some difficulties even when they have received effective reading instruction. With structured, evidence-based teaching, appropriate support and encouragement, they can develop their skills and become successful learners.

The experience of dyslexia can extend beyond reading and writing. When learning feels persistently difficult, particularly when those difficulties are misunderstood, it can affect a child’s confidence, motivation, self-esteem and sense of belonging. Parents and teachers can make an enormous difference by helping a child understand their dyslexia, recognising their progress and creating an environment in which they feel supported rather than defined by what they find difficult.

Your child’s strengths matter too. Children with dyslexia have their own individual strengths, interests and abilities. Some may show strengths in areas such as creativity, problem-solving, visual and spatial thinking or seeing the bigger picture, while others may have strengths in completely different areas. There is no single “dyslexic strength”. Taking the time to discover and nurture your child’s individual strengths, interests and passions can help build confidence and open opportunities as they grow.

Parents can play an important role in this journey. As children move through school, the subjects they choose, the activities they explore and eventually the education, training and careers they consider can provide opportunities to build on what they enjoy and do well. Encouraging children to explore their strengths and interests can help them see possibilities for their future beyond the areas they find difficult.

Dyslexia will remain part of the way your child learns, but it does not determine what they can achieve. Every child with dyslexia deserves to be understood and to receive the support they need to learn, develop their strengths and build confidence. With early and appropriate intervention, ongoing understanding and encouragement, children with dyslexia can learn successfully and thrive at school and beyond. 

At DAS, we believe dyslexia should be understood, supported and embraced as part of a different kind of mind.

Updated as of 8 October 2026

Understanding Dyslexia in the Classroom

Dyslexia is a lifelong learning difference that mainly affects the development of accurate and fluent reading, spelling and writing. Difficulties with reading can also affect comprehension, particularly when reading is slow or effortful. It is linked to differences in how the brain processes language and can occur across a wide range of abilities.

Students with dyslexia learn differently. They may need more time, explicit and structured teaching, repeated practice, and different ways to access or demonstrate learning. Their difficulties can persist even with effective reading instruction and are not due to low effort or motivation.

Every student with dyslexia is different. Some students may also experience difficulties in areas such as automaticity, working memory, processing speed or organisation. These vary between individuals and may form part of a student’s broader learning profile, reflect co-occurring developmental differences such as ADHD, Developmental Language Disorder, Dyscalculia or Developmental Coordination Disorder, or become more apparent in learning environments that place greater demands on these areas. 

The experience of dyslexia can also affect confidence, motivation, self-esteem and a student’s sense of belonging, particularly when their difficulties are misunderstood or inadequately supported. Students who learn differently deserve teachers who understand and embrace learning differently. Awareness and understanding can make an important difference to how students experience school, how they see themselves as learners and whether they feel able to succeed. Teachers can support this by recognising individual strengths and challenges, providing appropriate evidence-based support, and creating learning environments in which students feel understood and valued. 

Students with dyslexia may also demonstrate individual strengths, interests and ways of thinking in areas such as creativity, visual and spatial reasoning, problem-solving and big-picture thinking. These strengths vary from person to person and should be recognised as part of each student’s individual learning profile.

At DAS, we believe dyslexia should be understood, supported and embraced as part of a different kind of mind.

Updated as of 8 October 2026

Understanding Dyslexia in Adulthood

Dyslexia is a lifelong learning difference that primarily affects reading, spelling and writing. It is neurodevelopmental, which means the challenges associated with dyslexia begin as the brain develops, even if dyslexia is only recognised much later in life.

Some adults discover they may have dyslexia only after years of finding certain tasks more difficult or time-consuming than expected. You may have developed strategies that helped you manage these difficulties at school, university, work or in everyday life, without realising why you needed them and thinking that this is the normal experience for everyone.

As an adult, dyslexia may affect more than reading and spelling. You may notice that you need more time to process written information, organise your thoughts in writing, remember sequences or instructions, take notes, proofread your work or complete tasks quickly and automatically. Every person with dyslexia is different, and the things you find challenging may also change depending on the demands of your work, study and everyday life.

Dyslexia occurs across different levels of intelligence and is not caused by low effort or motivation. You may have developed considerable knowledge, skills and successful ways of working while continuing to experience difficulties associated with dyslexia.

Your dyslexia is also only one part of your individual profile. You will have your own combination of strengths, challenges, interests and abilities. Understanding how dyslexia affects you can help you recognise the strategies that work for you, explain your needs to others and make informed choices about support, adjustments or further assessment.

Why am I only recognising this now?

Dyslexia can be recognised at any age. Some people reach adulthood without their dyslexia being identified. They may have found ways to compensate for difficulties, normalised their experiences, chosen activities that played to their strengths, received informal support, or simply worked much harder to manage particular tasks. Changes in work, study or life can also introduce new demands that make previously manageable difficulties more noticeable.

A checklist cannot tell you whether you have dyslexia

Recognising several characteristics of dyslexia may help you understand patterns you have experienced throughout your life, but a checklist is not a diagnosis. A formal assessment by a qualified professional can provide a fuller understanding of your profile and ascertain if you have dyslexia.

Updated as of 8 October 2026

Dyslexia at a Glance

  • Dyslexia is a lifelong learning difference that primarily affects reading, spelling and writing.
  • It is brain-based and often runs in families. It reflects differences in how the brain develops and processes language and information.
  • Dyslexia is different for everyone. It exists on a continuum, with each person having their own profile of strengths and challenges.
  • Early signs can appear before a child learns to read. Recognising these signs early can support timely identification and access to appropriate intervention and support.
  • Dyslexia occurs across all languages and may present differently depending on the language and writing system.
  • Dyslexia occurs across a wide range of intellectual abilities. A person’s difficulties with reading, spelling and writing are not caused by low effort or motivation and can persist despite effective teaching.
  • Dyslexia can occur alongside other developmental differences, including ADHD, DLD, Dyscalculia, DCD and Autism.
  • Its impact can extend beyond learning. When difficulties are misunderstood or inadequately supported, they may affect confidence, self-esteem, motivation, wellbeing and a person’s sense of belonging.
  • The right support matters. People with dyslexia deserve access to appropriate, evidence-based teaching and support that responds to their individual needs and helps them learn successfully and thrive.
  • Dyslexia is also a different way of thinking. Many people with dyslexia demonstrate strengths in areas such as visual and spatial reasoning, creativity, problem-solving, and big-picture thinking.
  • At DAS, we believe dyslexia should be understood, valued and embraced as part of a different kind of mind.

Updated as of 8 October 2026