Although much past work predicts only two classes (e.g., negative/non-negative) (Batliner et al., 2003;Ang et al., 2002;Lee et al., 2001), our experiments produced the best predictions using our three-way distinction.
to (Lee et al., 2001), our classifications are contextrelative (relative to other turns in the dialogue), and taskrelative (relative to tutoring), because like (Ang et al., 2002), we are interested in detecting emotional changes across our dialogues.