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Dyslexia

A Validation of the Concept at Two Age Levels

Nathlie A. Badian is a consulting educational psychologist for the Holbrook Public Schools and a research fellow in neurology at Children's Hospital, Boston, and Harvard Medical School. Her main research interests are dyslexia and the early prediction of reading disability.

The 144 participants were administered tasks with a demonstrated relationship to reading. Both older students (8 to 10 years old) and younger students (6 to 7 years old) included three groups of poor readers (matched on word reading but differing in the discrepancy from expected reading level) and age-matched average readers. Older poor readers also had a control group of readingmatched younger subjects. The study provided no support for the concept of dyslexia at age 6 to 7 years. Among older participants there was support for the concept of dyslexia as a phonological deficit and of nondiscrepant garden-variety poor reading as a developmental lag. More discrepant participants with dyslexia exhibited orthographic and serial naming-speed deficits, as well as phonological deficits, and were a distinctive dyslexic group. Less discrepant participants with dyslexia were more similar to gardenvariety poor readers than to the more discrepant participants with dyslexia.

Journal of Learning Disabilities, Vol. 29, No. 1, 102-112 (1996)
DOI: 10.1177/002221949602900113


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