23. The apparatus according to claim 20, wherein: the at least one confusion matrix includes a plurality of character values and the second determining means comprises: means for obtaining, for each character sequence in the at least one reference word, a character value representing a likelihood that the character sequence of the at least one reference word is recognized as the corresponding character sequence in the incorrect recognized word, wherein each of the character sequence of the at least one reference word and the character sequence of the incorrect recognized word comprises at least one character position, means for establishing a reference word recognition value based on the obtained character values, means for generating a plurality of grammar values based on the incorrect recognized word, each grammar value corresponding to a different part of speech, and means for determining for the reference word a composite value based on the corresponding reference word recognition value and on one of the plurality of grammar values corresponding to the part of speech of the reference word.
23. The apparatus according to claim 20, wherein: the at least one confusion matrix includes a plurality of character values and the second determining means comprises: means for obtaining, for each character sequence in the at least one reference word, a character value representing a likelihood that the character sequence of the at least one reference word is recognized as the corresponding character sequence in the incorrect recognized word, wherein each of the character sequence of the at least one reference word and the character sequence of the incorrect recognized word comprises at least one character position, means for establishing a reference word recognition value based on the obtained character values, means for generating a plurality of grammar values based on the incorrect recognized word, each grammar value corresponding to a different part of speech, and means for determining for the reference word a composite value based on the corresponding reference word recognition value and on one of the plurality of grammar values corresponding to the part of speech of the reference word. 24. The apparatus according to claim 23, wherein the first determining means comprises: means for determining whether the recognized word is incorrectly spelled by determining whether the recognized word is found in a pre-stored dictionary maintained in memory, and means for determining whether the recognized word is grammatically correct.