Exploring Implicit Feedback for Open Domain Conversation Generation

Authors

  • Wei-Nan Zhang Harbin Institute of Technology
  • Lingzhi Li Harbin Institute of Technology
  • Dongyan Cao Harbin Institute of Technology
  • Ting Liu Harbin Institute of Technology

Keywords:

Conversation Generation, Implicit Feedback

Abstract

User feedback can be an effective indicator to the success of the human-robot conversation. However, to avoid to interrupt the online real-time conversation process, explicit feedback is usually gained at the end of a conversation. Alternatively, users' responses usually contain their implicit feedback, such as stance, sentiment, emotion, etc., towards the conversation content or the interlocutors. Therefore, exploring the implicit feedback is a natural way to optimize the conversation generation process. In this paper, we propose a novel reward function which explores the implicit feedback to optimize the future reward of a reinforcement learning based neural conversation model. A simulation strategy is applied to explore the state-action space in training and test. Experimental results show that the proposed approach outperforms the Seq2Seq model and the state-of-the-art reinforcement learning model for conversation generation on automatic and human evaluations on the OpenSubtitles and Twitter datasets.

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Published

2018-04-25

How to Cite

Zhang, W.-N., Li, L., Cao, D., & Liu, T. (2018). Exploring Implicit Feedback for Open Domain Conversation Generation. Proceedings of the AAAI Conference on Artificial Intelligence, 32(1). Retrieved from https://ojs.aaai.org/index.php/AAAI/article/view/11253