ABSTRACT
Several theories have emerged in the last decade that attempt to explicate the basic cognitive mechanisms underlying human numerical abilities [1–7]. Central to these theories is consideration of the comprehension and production of arabic and verbal numerals. The various explanations differentially implicate semantic and/or asemantic processes in performing basic numerical transcoding (i.e., translating numerals from one form to another, such as arabic 27 to verbal twenty seven). Moreover, the various theories also differ in their claims relating to the nature of the internal representations underlying numerical processing in general, and numerical transcoding in particular [8–15].
