ABSTRACT

The numerical domain is unique in at least three ways. First, numbers represent a particular aspect of reality (i.e., numerosity). Second, numbers are the object of specific processing such as calculation, parity judgment, magnitude comparison, and so on. And third, numbers can be represented in different formats: Arabic numbers (i.e., digit strings, e.g., 25), written numbers (i.e., letter strings; e.g., twenty-five) or spoken numbers (i.e., sequences of sounds; e.g., TWENTY-FIVE), Roman numerals (XXV), and so on 1 .