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Naturalistic Dialogue Management for Noisy Speech Recognition

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3 Author(s)
Rebecca J. Passonneau ; Center for Computational Learning Systems, Columbia University, New York, NY, USA ; Susan L. Epstein ; Tiziana Ligorio

With naturalistic dialogue management, a spoken dialogue system behaves as a human would under similar conditions. This paper reports on an experiment to develop naturalistic clarification strategies for noisy speech recognition in the context of spoken dialogue systems. We collected a wizard-of-Oz corpus in which human wizards with access to a rich set of clarification actions made clarification decisions online, based on human-readable versions of system data. The experiment compares an evaluation of calls to a baseline system in a library domain with calls to an enhanced version of the system. The new system has a clarification module based on the wizard data that is a decision tree constructed from three machine-learned models. It replicates the wizards' ability to ground partial understandings of noisy input and to build upon them. The enhanced system has a significantly higher rate of task completion, greater task success and improved efficiency.

Published in:

IEEE Journal of Selected Topics in Signal Processing  (Volume:6 ,  Issue: 8 )