Developmental Dysgraphias

Abstract

Two cases of developmental dysgraphia are presented. These ten-year-old children are of at least average intelligence and vocabulary, with normal speech and no known neurological abnormality. Psycholinguistic investigations reveal that although performance for the two cases is quantitatively similar, there are marked qualitative differences: The majority of R.B.'s spelling errors are phonologically plausible, and she is better at spelling regular than irregular words. Non-word spelling is as good as word spelling. The pattern of spelling deficit is consistent with the label surface dysgraphia. A phonological route to spelling has developed in relative isolation from a lexical–semantic route to spelling. A.H.'s spelling contrasts in a number of ways with R.B.'s. Fewer than 1/5 of his spelling errors are phonologically plausible, and the spelling of regular words is no better than the spelling of irregular words. A.H. may have impaired development of the segmentation component of the phonological route and therefore be overreliant on an, albeit imperfect, lexical–semantic spelling route. Normal children at the same spelling level display patterns of performance similar to R.B. but differ quantitatively from A.H.

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