5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

System-User Interaction and Response Strategy in Spoken Dialogue System

Yohei Okato, Keiji Kato, Mikio Yamamoto, Shuichi Itahashi

University of Tsukuba, Japan

There are a number of restrictions in human-machine interactions, which continue to warrant a better control of response utterances in spoken dialogue systems. In this paper, we investigated how system-response strategies influence users, focusing on: interjectory responses to users' utterances; and on verbose responses which vary between brief and detailed expression used for confirmation. The dialogue task selected consists of telephone shopping, and human-machine dialogues using Wizard-of-OZ method were collected for analysis. The results show that back-channel feedbacks and brief confirmations by our spoken dialogue system, prompt more utterances from and give more satisfaction to users. Second, users tend to give back-channel feedbacks whenever the system gives them feedbacks. It follows that users are able to gauge the system's ability to handle interjections and to predict its behaviour.

Full Paper

Bibliographic reference.  Okato, Yohei / Kato, Keiji / Yamamoto, Mikio / Itahashi, Shuichi (1998): "System-user interaction and response strategy in spoken dialogue system", In ICSLP-1998, paper 0683.