Preserved orthographic length and transitional probabilities in written spelling in a case of acquired dysgraphia

We present the performance of a patient with acquired dysgraphia, DS, who has intact oral spelling (100% correct) but severely impaired written spelling (7% correct). Her errors consisted entirely of well-formed letter substitutions. This striking dissociation is further characterized by consistent...

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Bibliographic Details
Published in:Brain and language 2002-07, Vol.82 (1), p.30-46
Main Authors: Chialant, Doriana, Domoto-Reilly, Kimiko, Proios, Hariklia, Caramazza, Alfonso
Format: Article
Language:English
Subjects:
Adult and adolescent clinical studies
Agraphia - diagnosis
Biological and medical sciences
Female
Humans
Language and communication disorders
Medical sciences
Middle Aged
Phonetics
Probability
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Severity of Illness Index
Verbal Behavior
Vocabulary
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Summary:We present the performance of a patient with acquired dysgraphia, DS, who has intact oral spelling (100% correct) but severely impaired written spelling (7% correct). Her errors consisted entirely of well-formed letter substitutions. This striking dissociation is further characterized by consistent preservation of orthographic, as opposed to phonological, length in her written output. This pattern of performance indicates that DS has intact graphemic representations, and that her errors are due to a deficit in letter shape assignment. We further interpret the occurrence of a small percentage of lexical errors in her written responses and a significant effect of letter frequencies and transitional probabilities on the pattern of letter substitutions as the result of a repair mechanism that locally constrains DS' written output.
ISSN:0093-934X
1090-2155
DOI:10.1016/S0093-934X(02)00011-1