Paper: The Importance of Sub-Utterance Prosody in Predicting Level of Certainty

ACL ID N09-2027
Title The Importance of Sub-Utterance Prosody in Predicting Level of Certainty
Venue Human Language Technologies
Session Short Paper
Year 2009
Authors

We present an experiment aimed at under- standing how to optimally use acoustic and prosodic information to predict a speaker’s level of certainty. With a corpus of utterances where we can isolate a single word or phrase that is responsible for the speaker’s level of certainty we use different sets of sub-utterance prosodic features to train models for predict- ing an utterance’s perceived level of certainty. Our results suggest that using prosodic fea- tures of the word or phrase responsible for the level of certainty and of its surrounding con- text improves the prediction accuracy without increasing the total number of features when compared to using only features taken from the utterance as a whole.