Abstract
The interaction quality (IQ) metric has recently been introduced for measuring the quality of spoken dialogue systems (SDSs) on the exchange level. While previous work relied on support vector machines (SVMs), we evaluate a conditioned hidden Markov model (CHMM) which accounts for the sequential character of the data and, in contrast to a regular hidden Markov model (HMM), provides class probabilities. While the CHMM achieves an unweighted average recall (UAR) of 0.39, it is outperformed by regular HMM with an UAR of 0.44 and a SVM with an UAR of 0.49, both trained and evaluated under the same conditions.
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