arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2306.04487cs.IR
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模糊偏好策略学习用于对话式推荐

Vague Preference Policy Learning for Conversational Recommendation

Gangyi Zhang, Chongming Gao, Wenqiang Lei, Xiaojie Guo, Shijun Li, Hongshen Chen, Zhuozhi Ding, Sulong Xu, Lingfei Wu

AI总结:

针对对话式推荐中用户偏好模糊问题,提出VPPL框架,通过软估计与动态策略学习减少过度过滤,实验验证其优于现有方法。

摘要:

对话式推荐系统(CRS)通常假设用户具有明确的偏好,这可能导致对相关备选项的过度过滤。然而,用户往往表现出模糊的、非二元的偏好。我们引入了模糊偏好多轮对话式推荐(VPMCR)场景,采用软估计机制来适应用户模糊且动态的偏好,同时减轻过度过滤问题。在VPMCR中,我们提出了模糊偏好策略学习(VPPL),包括模糊感知软估计(ASE)和动态感知策略学习(DPL)。ASE通过估计点击和未点击选项的得分来捕捉偏好模糊性,采用基于选择的方法和时间感知的偏好衰减。DPL利用ASE的偏好分布来引导对话,并适应偏好变化以进行推荐或属性查询。大量实验证明了VPPL在VPMCR中的有效性,其性能优于现有方法并树立了新的基准。我们的工作通过适应用户固有的模糊性和相对决策过程,推进了CRS的发展,提高了实际应用性。

英文摘要:

Conversational recommendation systems (CRS) commonly assume users have clear preferences, leading to potential over-filtering of relevant alternatives. However, users often exhibit vague, non-binary preferences. We introduce the Vague Preference Multi-round Conversational Recommendation (VPMCR) scenario, employing a soft estimation mechanism to accommodate users' vague and dynamic preferences while mitigating over-filtering. In VPMCR, we propose Vague Preference Policy Learning (VPPL), consisting of Ambiguity-aware Soft Estimation (ASE) and Dynamism-aware Policy Learning (DPL). ASE captures preference vagueness by estimating scores for clicked and non-clicked options, using a choice-based approach and time-aware preference decay. DPL leverages ASE's preference distribution to guide the conversation and adapt to preference changes for recommendations or attribute queries. Extensive experiments demonstrate VPPL's effectiveness within VPMCR, outperforming existing methods and setting a new benchmark. Our work advances CRS by accommodating users' inherent ambiguity and relative decision-making processes, improving real-world applicability.

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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