The mental representation of semitic words

This article is concerned with external evidence bearing on the nature of t he units stored in the mental lexicons of speakers of Semitic languages. On the basis of aphasic metathesis errors we collected in a single case study , we suggest that roots can be accessed as independent morphological units. We review documented language games and slips of the tongue that lead to t he same conclusion. We also discuss evidence for the morphemic status of te mplates from aphasic errors, language games, and slips of the tongue. We co nclude that the available external evidence is best accounted for within a morpheme-based theory of morphology that forms words by combining roots and templates.