3. The computer-implemented method of claim 1 , further comprising: performing second ASR processing on a second utterance, the second ASR processing predicting the first word; determining a total number of first predictions for the first word by adding a number of times the first word was predicted during the ASR testing and a number of times the first word was predicted during the first ASR processing; determining that the total number of first predictions for the first word exceeds a threshold; determining a first number of correct results for the first word, the first number of correct results corresponding to a number of times the first word was correctly predicted during the ASR testing and the first ASR processing; and determining a second prior probability for the first word by dividing the first number of correct results by the total number of first predictions, wherein determining the confidence score further comprises determining the confidence score for the hypothesis using the second prior probability for the first word.
1. A computer-implemented method of determining a confidence score for a potential speech recognition result, the method comprising: determining a first group of words, wherein each word of the first group of words was predicted a first number of times during automatic speech recognition (ASR) testing; determining a first total number of predictions for the first group, the first total number of predictions corresponding to the first number multiplied by a number of words in the first group of words; determining a first total number of correct results for the first group, the first total number of correct results corresponding to a cumulative number of times each word of the first group was correctly predicted during the ASR testing; determining a first group prior probability for the first group by dividing the first total number of correct results by the first total number of predictions; determining a first prior probability for a first word using the first group prior probability; receiving audio data corresponding to a first utterance; and performing first ASR processing on the audio data to generate a hypothesis, the hypothesis including the first word, wherein performing first ASR processing further comprises determining a confidence score for the hypothesis using the first prior probability for the first word.