Jr. Shelton et M. Weinrich, FURTHER EVIDENCE OF A DISSOCIATION BETWEEN OUTPUT PHONOLOGICAL AND ORTHOGRAPHIC LEXICONS - A CASE-STUDY, Cognitive neuropsychology, 14(1), 1997, pp. 105-129
We describe a patient who is significantly better at written picture n
aming than at spoken picture naming. His difficulty in oral production
is argued to result from damage to lexical-phonological output proces
sing, suggesting that activation of lexical-phonological output is not
necessary to support writing. Nor can his writing be supported by pho
neme-to-grapheme conversion rules, as evidenced by a complete inabilit
y to write nonwords to dictation. In addition, his reading comprehensi
on appears to be independent of phonological mediation, due to severel
y impaired phoneme-to-grapheme conversion abilities and impaired under
standing of aurally presented words when these words are presented wit
hout supporting context. It is argued that writing and reading compreh
ension do not require the generation of a phonological representation.