How is the Smooth Transition between Speakers Realized? --Consideration Based on an Analysis of a Spoken Dialogue Corpus--,

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Hanae Koiso (Department of Language Behavior, The National Language Research Institute) Yasuharu Den (Graduate School of Information Science, Nara Institute of Science and Technology)

Hanae Koiso (The National Language Reseach Institute) and Yasuharu Den (Nara Institute of Science and Technology)

概要:

Participants in conversation take speaking turns regularly and smoothly although who speaks and when he speaks are not decided in advance. Great attention has been paid to these phenomena in various areas. As for processing models of turn-taking, however, only the code model / based on turn-taking signals has been proposed so far, wihch has been pointed out, by several researchers, to have serious problems. In this paper, we propose an alternative model, the autonomous model. The basic assumptions of this model are: (1) the speaker and the hearer share cognitive environment including the speaker's speech, according to which the hearer takes her own speech actions, and (2) unlike the code model, the hearer need not decode / speaker's intent on his speech actions. We predict the distribution of smooth, as well as non-smooth, transitions between speakers based on the autonomous model and the code model, and compare them with those observed in real spoken dialogues, showing that the autonomous model can account for fundamental characteristics of turn-taking phenomena more precisely than the code model. We further discuss how the autonomous model accounts for the predominant occurrence of smooth transitions.

turn-taking (話者交替), spoken dialogue corpus (音声対話コーパス), autonomous model (自律モデル), code model (コードモデル)

円滑な話者交替はいかにして成立するか --会話コーパスの分析にもとづく考察--

小磯 花絵・伝 康晴