Abstract

RH, a brain-damaged patient with multiple impairments in numerical processing, was tested extensively on a set of transcoding tasks in which numerals were converted from one form to another (e.g. 94 → ninety-four). The pattern of error rates across tasks, and the patterns of error types within tasks, support the assumption that numerical processing is mediated by multiple independent numeral comprehension and numeral production processes that communicate via central semantic representations of numbers (McCloskey, Caramazza, & Basili, 1985).