Hyperlexia is the ability to read words far above what is expected for a child's age, often emerging before age 3, combined with difficulty understanding spoken language. Children with hyperlexia may decode text fluently — reading signs, labels, and books — while struggling to follow simple verbal instructions or hold a conversation. It is most commonly associated with autism. Researchers distinguish three types: Type I (neurotypical early readers), Type II (autistic children who read early as a splinter skill), and Type III (children who read early and show autistic-like traits that fade over time). Recognizing hyperlexia matters because these children often have hidden comprehension gaps masked by their reading ability, and therapy can leverage their visual strengths.
Hyperlexia is often overlooked in evaluations because the child 'reads well.' Identifying it ensures appropriate language comprehension goals in IEPs and waiver-funded speech therapy.