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Updated: Jun 13, 2026

Assessing Dyslexia at Six Year of Age
Published on: May 1, 2020
Assessing component language deficits in the early detection of reading difficulty risk
Heather K J van der Lely1, Chloë R Marshall
1Department of Psychology, Harvard University, Cambridge, MA 02138, USA. h.vanderlely@dldcn.org
Abstract:
This article focuses on some of the linguistic components that underlie letter-sound decoding skills and reading comprehension: specifically phonology, morphology, and syntax. Many children who have reading difficulties had language deficits that were detectable before they began reading. Early identification of language difficulties will therefore help identify children at risk of reading failure. Using a developmental psycholinguistic framework, the authors provide a model of how syntax, morphology, and phonology break down in children with language impairments. The article reports on a screening test of these language abilities for preschool or young school-aged children that identifies those at risk for literacy problems and in need of further assessment.
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