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Bundle recommender systems recommend sets of items (e.g., pants, shirt, and shoes) to users, but they often suffer from two issues: significant interaction sparsity and a large output space. In this work, we extend multi-round…

Information Retrieval · Computer Science 2022-07-27 Zhankui He , Handong Zhao , Tong Yu , Sungchul Kim , Fan Du , Julian McAuley

Conversational recommender systems (CRSs) integrate both recommendation and dialogue tasks, making their evaluation uniquely challenging. Existing approaches primarily assess CRS performance by separately evaluating item recommendation and…

Information Retrieval · Computer Science 2026-01-27 Nuo Chen , Quanyu Dai , Xiaoyu Dong , Piaohong Wang , Qinglin Jia , Zhaocheng Du , Zhenhua Dong , Xiao-Ming Wu

Conversational recommender systems (CRSs) capture user preference through textual information in dialogues. However, they suffer from data sparsity on two fronts: the dialogue space is vast and linguistically diverse, while the item space…

Information Retrieval · Computer Science 2025-07-02 Sixiao Zhang , Mingrui Liu , Cheng Long , Wei Yuan , Hongxu Chen , Xiangyu Zhao , Hongzhi Yin

Conversational Recommender Systems (CRS) actively elicit user preferences to generate adaptive recommendations. Mainstream reinforcement learning-based CRS solutions heavily rely on handcrafted reward functions, which may not be aligned…

Information Retrieval · Computer Science 2023-11-01 Zhendong Chu , Nan Wang , Hongning Wang

In recent years, conversational recommender system (CRS) has received much attention in the research community. However, existing studies on CRS vary in scenarios, goals and techniques, lacking unified, standardized implementation or…

Computation and Language · Computer Science 2021-01-05 Kun Zhou , Xiaolei Wang , Yuanhang Zhou , Chenzhan Shang , Yuan Cheng , Wayne Xin Zhao , Yaliang Li , Ji-Rong Wen

Sequential recommendation (SR) aims to predict the subsequent behaviors of users by understanding their successive historical behaviors. Recently, some methods for SR are devoted to alleviating the data sparsity problem (i.e., limited…

Information Retrieval · Computer Science 2022-08-30 Ziyang Wang , Huoyu Liu , Wei Wei , Yue Hu , Xian-Ling Mao , Shaojian He , Rui Fang , Dangyang chen

Conversational Recommender Systems (CRS) has become an emerging research topic seeking to perform recommendations through interactive conversations, which generally consist of generation and recommendation modules. Prior work on CRS tends…

Computation and Language · Computer Science 2022-09-26 Lingzhi Wang , Shafiq Joty , Wei Gao , Xingshan Zeng , Kam-Fai Wong

User-centric recommendation has become essential for delivering personalized services, as it enables systems to adapt to users' evolving behaviors while respecting their long-term preferences and privacy constraints. Although federated…

Information Retrieval · Computer Science 2026-03-19 Chunxu Zhang , Zhiheng Xue , Guodong Long , Weipeng Zhang , Bo Yang

Growing attention has been paid in Conversational Recommendation System (CRS), which works as a conversation-based and recommendation task-oriented tool to provide items of interest and explore user preference. However, existing work in CRS…

Artificial Intelligence · Computer Science 2022-08-19 Bingbing Wen , Xiaoning Bu , Chirag Shah

Human conversations of recommendation naturally involve the shift of interests which can align the recommendation actions and conversation process to make accurate recommendations with rich explanations. However, existing conversational…

Computation and Language · Computer Science 2022-11-08 Jinfeng Zhou , Bo Wang , Minlie Huang , Dongming Zhao , Kun Huang , Ruifang He , Yuexian Hou

The task of the session-based recommendation is to predict the next interaction of the user based on the anonymized user's behavior pattern. And personalized version of this system is a promising research field due to its availability to…

Information Retrieval · Computer Science 2023-06-06 Jisoo Cha , Haemin Jeong , Wooju Kim

The conversational recommendation system (CRS) has been criticized regarding its user experience in real-world scenarios, despite recent significant progress achieved in academia. Existing evaluation protocols for CRS may prioritize…

Computation and Language · Computer Science 2024-05-07 Chen Huang , Peixin Qin , Yang Deng , Wenqiang Lei , Jiancheng Lv , Tat-Seng Chua

Conversational recommender systems (CRS) aim to provide personalized recommendations via interactive dialogues with users. While large language models (LLMs) enhance CRS with their superior understanding of context-aware user preferences,…

Information Retrieval · Computer Science 2025-02-21 Yaochen Zhu , Chao Wan , Harald Steck , Dawen Liang , Yesu Feng , Nathan Kallus , Jundong Li

Nowadays, reading or writing comments on captivating videos has emerged as a critical part of the viewing experience on online video platforms. However, existing recommender systems primarily focus on users' interaction behaviors with…

Information Retrieval · Computer Science 2025-07-24 Bowen Zheng , Zihan Lin , Enze Liu , Chen Yang , Enyang Bai , Cheng Ling , Wayne Xin Zhao , Ji-Rong Wen

Acquiring valuable data from the rapidly expanding information on the internet has become a significant concern, and recommender systems have emerged as a widely used and effective tool for helping users discover items of interest. The…

Information Retrieval · Computer Science 2025-02-25 Jinfeng Xu , Zheyu Chen , Shuo Yang , Jinze Li , Wei Wang , Xiping Hu , Steven Hoi , Edith Ngai

Modern recommendation systems typically follow two complementary paradigms: collaborative filtering, which models long-term user preferences from historical interactions, and conversational recommendation systems (CRS), which interact with…

Information Retrieval · Computer Science 2025-06-24 Vinaik Chhetri , Yousaf Reza , Moghis Fereidouni , Srijata Maji , Umar Farooq , AB Siddique

Conversational Recommender Systems (CRSs) engage users in multi-turn interactions to deliver personalized recommendations. The emergence of large language models (LLMs) further enhances these systems by enabling more natural and dynamic…

Computation and Language · Computer Science 2025-04-18 Xiaoyan Zhao , Yang Deng , Wenjie Wang , Hongzhan lin , Hong Cheng , Rui Zhang , See-Kiong Ng , Tat-Seng Chua

Conversational recommender systems have attracted immense attention recently. The most recent approaches rely on neural models trained on recorded dialogs between humans, implementing an end-to-end learning process. These systems are…

Information Retrieval · Computer Science 2022-05-26 Ahtsham Manzoor , Dietmar Jannach

Conversational Recommender Systems (CRSs) aim to elicit user preferences via natural dialogue to provide suitable item recommendations. However, current CRSs often deviate from realistic human interactions by rapidly recommending items in…

Information Retrieval · Computer Science 2025-09-01 Manato Tajiri , Michimasa Inaba

Training conversational recommender systems (CRS) requires extensive dialogue data, which is challenging to collect at scale. To address this, researchers have used simulated user-recommender conversations. Traditional simulation approaches…

Artificial Intelligence · Computer Science 2026-03-20 Jerome Ramos , Feng Xia , Xi Wang , Shubham Chatterjee , Xiao Fu , Hossein A. Rahmani , Aldo Lipani