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arXiv 2101.09459cs.IRcs.CL
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会话式推荐系统的研究进展与挑战

Advances and Challenges in Conversational Recommender Systems: A Survey

University of Science and Technology of China(中国科学技术大学);National University of Singapore(新加坡国立大学);University of Amsterdam(阿姆斯特丹大学);Ahold Delhaize(阿霍德德尔海兹)

Chongming Gao, Wenqiang Lei, Xiangnan He, Maarten de Rijke, Tat-Seng Chua

摘要:

推荐系统利用交互历史来估计用户偏好,在广泛的行业应用中得到了大量的应用。然而,静态推荐模型很难回答两个重要的问题,由于固有的缺点:(a)用户到底喜欢什么?(b)为什么用户会喜欢某个项目?缺点是由于静态模型学习用户偏好的方式,即,没有明确的指示和来自用户的积极反馈。最近兴起的会话式推荐系统(CRS)从根本上改变了这种情况。在CRS中,用户和系统可以通过自然语言交互进行动态通信,这为明确获得用户的确切偏好提供了前所未有的机会。在开发CRS方面,已经投入了相当大的努力,这些努力分布在不同的环境和应用程序中。现有的CRS模型、技术和评估方法还远未成熟。在本文中,我们提供了一个系统的审查,在当前CRS中使用的技术。我们总结了开发CRS的五个方向的关键挑战:(1)基于XML的用户偏好获取。(2)多轮会话推荐策略。(3)对话理解与生成。(4)开发-勘探权衡。(5)评估和用户模拟。这些研究方向涉及信息检索(IR)、自然语言处理(NLP)和人机交互(HCI)等多个研究领域。基于这些研究方向,我们讨论了一些未来的挑战和机遇。我们为来自多个社区的研究人员提供了一个路线图,以开始在这一领域。我们希望这项调查可以帮助识别和解决CRS的挑战,并启发未来的研究。

英文摘要:

Recommender systems exploit interaction history to estimate user preference, having been heavily used in a wide range of industry applications. However, static recommendation models are difficult to answer two important questions well due to inherent shortcomings: (a) What exactly does a user like? (b) Why does a user like an item? The shortcomings are due to the way that static models learn user preference, i.e., without explicit instructions and active feedback from users. The recent rise of conversational recommender systems (CRSs) changes this situation fundamentally. In a CRS, users and the system can dynamically communicate through natural language interactions, which provide unprecedented opportunities to explicitly obtain the exact preference of users. Considerable efforts, spread across disparate settings and applications, have been put into developing CRSs. Existing models, technologies, and evaluation methods for CRSs are far from mature. In this paper, we provide a systematic review of the techniques used in current CRSs. We summarize the key challenges of developing CRSs in five directions: (1) Question-based user preference elicitation. (2) Multi-turn conversational recommendation strategies. (3) Dialogue understanding and generation. (4) Exploitation-exploration trade-offs. (5) Evaluation and user simulation. These research directions involve multiple research fields like information retrieval (IR), natural language processing (NLP), and human-computer interaction (HCI). Based on these research directions, we discuss some future challenges and opportunities. We provide a road map for researchers from multiple communities to get started in this area. We hope this survey can help to identify and address challenges in CRSs and inspire future research.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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