An affective chatbot with controlled specific emotion expression  

作　　者：Chenglin JIANG Chunhong ZHANG Yang JI Zheng HU Zhiqiang ZHAN Guanghua YANG 

机构地区：[1]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]School of Intelligent Systems Science and Engineering,Jinan University,Zhuhai 519070,China

出　　处：《Science China(Information Sciences)》2022年第10期118-135,共18页中国科学（信息科学）（英文版）

基　　金：supported in part by National Key Research and Development Program of China (Grant No.2019YFF0302601)。

摘　　要：Endowing a chatbot with the capability of specific emotion expression will significantly improve both chatbot’s usability and users’ satisfaction.Recently,many studies on open-domain neural emotional,conversational models(chatbots) have been conducted.However,enabling a chatbot to control what kind of emotion to respond to in conversation explicitly is still under exploration.This paper proposes a novel affective chatbot based on the sequence-to-sequence framework,responding with appropriate emotion like a human.In particular,a new module called single emotion generator is designed in the new chatbot model to address the existing issue of controlling over reacting emotion.It enables the chatbot to select the appropriate emotion for a response when interacting with users.In the decoder,an affective lexiconbased method generates emotion-awareness responses based on the specific emotion controlled by the single emotion generator.The proposed chatbot outperforms mainstream baseline algorithms for both semantic fluency and emotion consistence metrics through experimental evaluation.The experimental results also demonstrate that the new chatbot obtains the ability to control the emotion for response explicitly and responds emotionally with the specific emotion.

关 键 词：natural language generation emotional chatbot sequence-to-sequence emotion distribution emotion analysis 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]