4. The method of claim 1 , wherein the first logged information comprises audio data representing at least a portion of the one or more first spoken utterances on which the first speech recognition task was performed.
4. The method of claim 1 , wherein the first logged information comprises audio data representing at least a portion of the one or more first spoken utterances on which the first speech recognition task was performed. 7. The method of claim 4 , wherein the at least one item of information is selected from a group consisting of: a phonetic analysis of the plurality of phrases in the N-best match; an acoustic confusability of at least one portion of the one or more first spoken utterances corresponding to the recognized phrase; and a correlation difference between the at least one portion of the one or more first spoken utterances corresponding to the recognized phrase and other spoken utterances whose corresponding recognized phrases coincide with the recognized phrase.