Early Warning Signs

The earlier dyslexia is identified, the more effective intervention can be. The brain is most plastic in the preschool and early elementary years, and reading circuits that are trained early become far more robust than those trained later. Fortunately, dyslexia leaves a detectable trail of signals before a child ever begins formal reading instruction — if parents and teachers know what to look for.

Preschool Warning Signs (Ages 3–5)

The earliest signs of dyslexia appear in spoken language, not reading. Since dyslexia is a phonological processing disorder, it affects the child’s ability to perceive and manipulate the sounds of language even before print is introduced.

Watch for:

• Delayed language onset: first words or first two-word phrases arriving later than typical peers
• Persistent baby talk or mispronunciation: errors that continue past the age when most children have outgrown them (e.g., “wabbit” for “rabbit” at age 5)
• Trouble with nursery rhymes: difficulty learning or reciting simple rhymes like “Jack and Jill” or “Humpty Dumpty”
• Weak rhyme awareness: inability to recognize that “cat” and “bat” rhyme, or difficulty producing a word that rhymes with “sun”
• Poor word retrieval: frequently pausing and using vague terms (“the thing,” “you know”) when trying to name familiar objects
• Difficulty learning letter names: slower than peers to learn the alphabet, even with regular exposure
• Family history of dyslexia: a dyslexic parent or sibling substantially increases risk

Kindergarten and First Grade Warning Signs (Ages 5–7)

Once children enter school and begin encountering print, new warning signs emerge:

• Difficulty learning letter-sound correspondences (knowing that “b” says /b/)
• Trouble sounding out simple, phonetically regular words (“cat,” “hop,” “sun”)
• Reading words correctly one moment and failing to recognize the same word moments later
• Relying heavily on pictures or context rather than sounding out words
• Slow, labored oral reading with many errors
• Avoidance of reading tasks or strong emotional resistance to reading aloud
• Spelling that is wildly inconsistent, even for common words

Second and Third Grade Warning Signs (Ages 7–9)

By second grade, most children have cracked the alphabetic code. Warning signs at this stage include:

• Continued slow, inaccurate word reading that has not improved with instruction
• Inability to read common high-frequency words automatically
• Reading far below grade level
• Written work that is significantly below the child’s oral sophistication
• Avoidance of all reading activities and declining confidence

A Note on Bright Children

Dyslexia is often missed in children with high cognitive ability because their intellectual strengths allow them to compensate partially — memorizing sight words, guessing cleverly from context, using their strong vocabulary to mask decoding failures. These children may not fall far enough below grade-level benchmarks to trigger formal concern, even though they are working far harder than their peers to achieve the same results. Parents and teachers should watch for effort-outcome mismatches: a child who clearly works intensely but produces reading results that don’t match their apparent intelligence.

Based on “Overcoming Dyslexia” by Sally Shaywitz, M.D. (2020 edition)