12. A computer-implemented method for adapting a speech recognition system, comprising: detecting a user-initiated change to dictated text; automatically assigning a categorization to the user-initiated change to the dictated text, the categorization being automatically assigned based at least in part upon a measurement of a number of words changed as a result of the user-initiated change, wherein automatically assigning the categorization comprises automatically identifying, based at least in part upon the measurement of the number of words, the user-initiated change as being either a correction or an edit operation; determining a number of times and a most recent time that the user-initiated change has occurred; and selectively adapting the speech recognition engine by temporarily adding a word pair associated with the user-initiated change to a lexicon of the speech recognition engine based at least in part upon the categorization, the number of times the user-initiated change has occurred, and the most recent time that the user-initiated change has occurred, and wherein selectively adapting the speech recognition engine further comprises increasing a probability of a pronunciation associated with the word pair.
17. The method of claim 12 , wherein automatically assigning comprises automatically assigning based at least in part on a comparison of a speech recognition score of the dictated text to a speech recognition score of the dictated text after application of the user-initiated change.