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1 Introduction

In this appendix we give an account of the testing that has been carried out on two spelling checkers, in order to assess our own evaluation methodology.
Generally spelling checkers are integrated in a word processor, and this is the way most end users access them. In order to mimic as closely as possible real-world experiences, we have tested the checker via the word processors as well. It is clear that the underlying spelling engines might offer different functionalities from those offered via the word processor interfaces, but those would in any case be hidden from the typical end user.

The spelling checker function of the word processor is accessed in a batch mode by the ASCC software, that simulates the user's behaviour in a spelling session. ASCC also returns a report on the number of words recognised or rejected, and their relative percentage, and, if applicable, the list of suggested replacement words.


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