19. Training apparatus for helping a user improve his use of a word recognition system, which recognition system includes means for matching signal models for each of a plurality of words against a succession of user generated signals which the user intends to represent words and recognition output means, responsive to the results of the matching for each successive user generated signal, for producing an output indicating the word selected as most likely to correspond to that user generated signal, said training apparatus comprising: means for prompting the user to generate a user generated signal for each of a corresponding succession of expected words; means for receiving each such user generated signal; means for deriving information from each such user generated signal for use in a signal model for that user generated signal's corresponding expected word; and training output means for responding to the user's successive generation of said user generated signals by successively producing outputs which are similar to those said recognition output means would produce in response to the user generated signals corresponding to said expected words.
19. Training apparatus for helping a user improve his use of a word recognition system, which recognition system includes means for matching signal models for each of a plurality of words against a succession of user generated signals which the user intends to represent words and recognition output means, responsive to the results of the matching for each successive user generated signal, for producing an output indicating the word selected as most likely to correspond to that user generated signal, said training apparatus comprising: means for prompting the user to generate a user generated signal for each of a corresponding succession of expected words; means for receiving each such user generated signal; means for deriving information from each such user generated signal for use in a signal model for that user generated signal's corresponding expected word; and training output means for responding to the user's successive generation of said user generated signals by successively producing outputs which are similar to those said recognition output means would produce in response to the user generated signals corresponding to said expected words. 20. Training apparatus as in claim 19, further including: recognition means for recognizing the words which user generated signals represent by scoring matches of such user generated signals against signal models representing a plurality of individual words, including that user generated sugnal's associated expected word; and means, responsive to a score of a given user generated signal against the signal model of that user generated signal's corresponding expected word which is above a given level, for incorporating information from that user generated signal into a signal model of that expected word suitable for use in said word recognition system.