Early detection of dyslexia is one of the preventive actions with the greatest impact on a child's educational trajectory. Early identification — ideally before reading failure becomes entrenched — is possible and is based on recognising warning signs that appear long before formal reading instruction begins.
Dyslexia
How to detect dyslexia: clinical warning signs by age
Pre-reading indicators (3-6 years): detecting before reading begins
Dyslexia can be anticipated — with clinically relevant probability — before the child learns to read, through phonological processing markers: difficulty with rhymes, deficient syllable segmentation, difficulty identifying first sounds in words, slow rapid automatised naming (RAN — one of the highest-value early predictors), and reduced verbal short-term memory (difficulty repeating non-words).
Predictive data: The combination of reduced phonological awareness and slow naming speed (Double Deficit Hypothesis, Wolf & Bowers, 1999) is the strongest predictor of dyslexia, identifying approximately 70% of children who will develop it.
Years 1-2 (6-8 years): the first reading signs
When formal reading instruction begins, children with dyslexia show: slowness in acquiring reading mechanics, typical phonological decoding errors (confusion between visually similar letters: b/d, p/q), distressing oral reading, writing with many spelling errors (phonetically spelled words), and irregular, difficult-to-read handwriting.
Years 3-6 (9-12 years): when compensatory strategies are exhausted
As reading demands increase significantly, for undiagnosed children with dyslexia: performance far below potential in all reading-dependent subjects, active reading avoidance, severe difficulty studying independently, persistently poor spelling and damaged reading self-esteem ("I'm stupid", "I can't read").
Differentiating dyslexia from other reading difficulties
| Condition | Main difficulty | Key differentiation |
|---|---|---|
| Dyslexia | Phonological decoding | Phonological basis, adequate oral comprehension, normal/high IQ |
| Hearing impairment | Auditory discrimination | Affects oral comprehension; audiometry diagnostic |
| ADHD | Sustained attention | Can read correctly under optimal conditions; variable errors |
| Insufficient reading instruction | Limited exposure | Improves rapidly with adequate instruction |
Frequently asked questions
Letter reversal (b/d, p/q) is common and considered normal up to age 7-8 in many children without dyslexia. It is not a diagnostic sign in itself. What matters is the pattern of signs: reading slowness, phonological difficulties, poor spelling and functional impact on learning.
Formal diagnosis requires sufficient reading instruction (generally from Year 2-3, around age 7-8). But <em>risk indicators</em> can be identified from age 4-5 through phonological awareness and rapid naming assessment.
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