This paper addresses the issue of the structure of graphemic output re
presentations via an analysis of the spelling performance of a patient
with acquired dysgraphia. It is argued that the patient's pattern of
performance with words that contain double letters (e.g., ''bb'' in ''
rabbit'') is inconsistent with the view that graphemic representations
are simple linear sequences of graphemes (or abstract letter identiti
es). Rather, it is proposed that graphemic representations are multidi
mensional structures that separately encode information about grapheme
identity and grapheme quantity. (C) 1996 Academic Press, Inc.