What is dysorthographia? A clear definition to help you understand
Dysorthographia is a term that comes up more and more often in conversations about learning disorders, yet its meaning often remains unclear, even for the families directly concerned. Here is a precise, accessible definition grounded in current scientific evidence.
Dysorthographia: a specific spelling disorder
Dysorthographia is a specific and persistent disorder of spelling acquisition. It affects the ability to write words correctly — to encode sounds into letters, to memorise the orthographic form of words, and to apply the rules of written grammar. A child with dysorthographia makes numerous, varied spelling errors that persist despite regular teaching, sincere effort and entirely normal intelligence.
Dysorthographia is not a matter of laziness, lack of attention or unwillingness. It is a neurodevelopmental disorder of neurological origin, resulting from a different way of processing phonological and orthographic information.
Dysorthographia and dyslexia: two distinct disorders that very often occur together
Dysorthographia is frequently confused with dyslexia — or regarded as a simple consequence of it. In fact, these are two distinct disorders, even though they share common cognitive mechanisms. Dyslexia specifically affects reading — the decoding of written words. Dysorthographia specifically affects writing — orthographic encoding. The two disorders co-occur in around 60 to 80% of children who have one of them, but it is possible to be dysorthographic without being dyslexic, and vice versa.
How does dysorthographia actually show up?
A child with dysorthographia shows characteristic, persistent spelling errors. Two main types of error are distinguished. Phonological errors — “fénêtre” for “fenêtre”, “seau” for “sot” — which result from difficulty linking sounds to the correct letters. And orthographic errors — unmastered grammatical rules, incorrect agreement of past participles, confusion between homophones — which result from difficulty memorising and applying spelling conventions.
These errors persist despite corrections, despite efforts to memorise, and despite appropriate teaching. It is precisely this resistance that distinguishes dysorthographia from a passing, ordinary weakness in spelling.
What is the origin of dysorthographia?
Like dyslexia, dysorthographia results mainly from a phonological deficit — a difficulty in processing the sounds of language in a precise and stable way. This deficit disrupts the ability to convert heard sounds into written letters, and to memorise the orthographic form of words. Genetic factors play an important role — dysorthographia is frequently hereditary.
How many children are affected?
Dysorthographia affects around 5 to 10% of school-age children. It is more common in boys than in girls. It is one of the most widespread learning disorders — but also one of the most underestimated, because spelling mistakes are often wrongly attributed to a lack of effort rather than to a genuine neurological disorder.
Can dysorthographia be cured?
Dysorthographia is not cured in the strict sense — it is lifelong. But it can be remediated and compensated for very effectively. With appropriate speech and language therapy, suitable compensatory strategies and the right digital tools, a person with dysorthographia can reach a functional level of writing that allows them to lead a fulfilling school and professional life. To understand the full range of DYS disorders, lesdys.fr offers comprehensive resources for families and professionals.
