The status of double letters in Graphemic representations

This paper addresses the issue of the structure of graphemic output representations 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 identities). Rather, it is proposed that graphemic representations are multidimensional structures that separately encode information about grapheme identity and grapheme quantity.