[2F1-OS-14] OS-14

[2F1-OS-14-05] Research of User's Acceptance Range Reguarding to Responses of Non-task-oriented Dialogue System

パラ言語情報に着目して

〇Hirofumi KIKUCHI¹, JIE YANG¹, Hideaki KIKUCHI¹ (1. WASEDA University)

Keywords:Dialogue System, Paralinguistic Information, Non-task-oriented, Valence, Breakdown

Recently, Japan is reaching a super aging society. The staying alone elderly person tend to be less likely to talk with another, to have no one to rely when in trouble. The dialogue agent is expected to eliminate the social isolation of such as those elderly person living alone. One of roles of dialogue systems which users talk to by non-task-oriented is to share mental states. When users can not accept paralinguistic information that dialogue systems response to users' expressed mental state, users' dialogue continuance desire is decreasing. This study aims to solve such a problem of a failure of dialogue. Assuming a dialogue between the user and the system, we prepared speech stimulation connected the fixed users' utterance and the system response then conducted a listening evaluation experiment. For the system response, we used general purpose backchannel "Soudesuka". Through the analysis, the acceptance range of the system response diversity focusing on paralinguistic information was investigated. About the acceptance range, measurable correlation was seen in valence state of users' utterance and the system response. From discussion of research result, it leads to the proposal of the guideline for making the feature of the paralinguistic information of the system response to the users' utterance acceptable.