We present a project aimed at understanding the acoustic and prosodic correlates of
confidence and uncertainty in spoken language. We elicited speech produced under varying
levels of certainty and performed perceptual and statistical analyses on the speech data to
determine which prosodic features (eg, pitch, energy, timing) are associated with a speaker's
level of certainty and where these prosodic manifestations occur relative to the location of
the word or phrase that the speaker is confident or uncertain about. Our findings suggest that …