Overview of the Dialogue Breakdown Detection Challenge 4

To promote the research and development of dialogue breakdown detection for dialogue systems, we have been organizing a series of dialogue breakdown detection challenges to detect a system’s inappropriate utterances that lead to dialogue breakdowns in chat-oriented dialogue. In this paper, we overview Dialogue Breakdown Detection Challenge 4 (DBDC4). As in the previous challenges, we used datasets in English and Japanese. Four teams participated in the challenge, in which all four teams worked on English, and two of the four teams worked on Japanese as well. This paper describes the task setting, evaluation metrics, and datasets for the challenge and the results of the submitted runs of the participants.