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In recent years, sequential recommender systems (SRSs) and session-based recommender systems (SBRSs) have emerged as a new paradigm of RSs to capture users' short-term but dynamic preferences for enabling more timely and accurate…

Information Retrieval · Computer Science 2022-05-24 Shoujin Wang , Qi Zhang , Liang Hu , Xiuzhen Zhang , Yan Wang , Charu Aggarwal

Conversational and question-based recommender systems have gained increasing attention in recent years, with users enabled to converse with the system and better control recommendations. Nevertheless, research in the field is still limited,…

Information Retrieval · Computer Science 2020-06-01 Jie Zou , Yifan Chen , Evangelos Kanoulas

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

While recommender systems (RSs) traditionally rely on extensive individual user data, regulatory and technological shifts necessitate reliance on aggregated user information. This shift significantly impacts the recommendation process,…

Information Retrieval · Computer Science 2025-02-27 Gur Keinan , Omer Ben-Porat

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

User simulation is increasingly vital to develop and evaluate recommender systems (RSs). While Large Language Models (LLMs) offer promising avenues to simulate user behavior, they often struggle with the absence of specific task alignment…

Human-Computer Interaction · Computer Science 2026-04-20 Tianjun Wei , Huizhong Guo , Yingpeng Du , Zhu Sun , Huang Chen , Dongxia Wang , Jie Zhang

Conversational recommender systems (CRS) enhance user experience through multi-turn interactions, yet evaluating CRS remains challenging. User simulators can provide comprehensive evaluations through interactions with CRS, but building…

Human-Computer Interaction · Computer Science 2025-08-01 Luyu Chen , Quanyu Dai , Zeyu Zhang , Xueyang Feng , Mingyu Zhang , Pengcheng Tang , Xu Chen , Yue Zhu , Zhenhua Dong

Conversational recommender systems aim to provide personalized recommendations by analyzing and utilizing contextual information related to dialogue. However, existing methods typically model the dialogue context as a whole, neglecting the…

Information Retrieval · Computer Science 2025-04-25 Guojia An , Jie Zou , Jiwei Wei , Chaoning Zhang , Fuming Sun , Yang Yang

In Conversational Recommendation Systems (CRS), a user provides feedback on recommended items at each turn, leading the CRS towards improved recommendations. Due to the need for a large amount of data, a user simulator is employed for both…

Information Retrieval · Computer Science 2025-07-25 Maria Vlachou

Proactively and naturally guiding the dialog from the non-recommendation context (e.g., Chit-chat) to the recommendation scenario (e.g., Music) is crucial for the Conversational Recommender System (CRS). Prior studies mainly focus on…

Information Retrieval · Computer Science 2024-01-02 Can Chen , Hao Liu , Zeming Liu , Xue Liu , Dejing Dou

Recommender systems (RSs) have been playing an increasingly important role for informed consumption, services, and decision-making in the overloaded information era and digitized economy. In recent years, session-based recommender systems…

Information Retrieval · Computer Science 2021-05-18 Shoujin Wang , Longbing Cao , Yan Wang , Quan Z. Sheng , Mehmet Orgun , Defu Lian

Conversational recommender systems (CRSs) aim to proactively capture user preferences through natural language dialogue and recommend high-quality items. To achieve this, CRS gathers user preferences via a dialog module and builds user…

Artificial Intelligence · Computer Science 2025-11-12 Zhenye Yang , Jinpeng Chen , Huan Li , Xiongnan Jin , Xuanyang Li , Junwei Zhang , Hongbo Gao , Kaimin Wei , Senzhang Wang

The chit-chat-based conversational recommendation systems (CRS) provide item recommendations to users through natural language interactions. To better understand user's intentions, external knowledge graphs (KG) have been introduced into…

Computation and Language · Computer Science 2021-05-19 Tong Zhang , Yong Liu , Peixiang Zhong , Chen Zhang , Hao Wang , Chunyan Miao

Existing conversational recommendation (CR) systems usually suffer from insufficient item information when conducted on short dialogue history and unfamiliar items. Incorporating external information (e.g., reviews) is a potential solution…

Computation and Language · Computer Science 2021-06-03 Yu Lu , Junwei Bao , Yan Song , Zichen Ma , Shuguang Cui , Youzheng Wu , Xiaodong He

Conversational Recommender Systems (CRSs) leverage natural language interactions for personalized recommendation, yet information-scarce dialogue histories and single-turn recommendation paradigms may severely hinder accurate modeling of…

Information Retrieval · Computer Science 2026-04-07 Xingyuan Xiang , Xiangchen Pan , Wei Wei

Conversational Recommender Systems (CRSs) aim to provide personalized recommendations by capturing user preferences through interactive dialogues. Explainability in CRSs is crucial as it enables users to understand the reasoning behind…

Computation and Language · Computer Science 2025-10-03 Zhangchi Qiu , Linhao Luo , Shirui Pan , Alan Wee-Chung Liew

Conversational recommendation systems (CRS) leverage contextual information from conversations to generate recommendations but often struggle due to a lack of collaborative filtering (CF) signals, which capture user-item interaction…

Information Retrieval · Computer Science 2025-02-12 Ahmad Bin Rabiah , Nafis Sadeq , Julian McAuley

Conversational Recommender Systems (CRSs) in E-commerce platforms aim to recommend items to users via multiple conversational interactions. Click-through rate (CTR) prediction models are commonly used for ranking candidate items. However,…

Information Retrieval · Computer Science 2021-05-03 Chi-Man Wong , Fan Feng , Wen Zhang , Chi-Man Vong , Hui Chen , Yichi Zhang , Peng He , Huan Chen , Kun Zhao , Huajun Chen

Conversational recommendation frameworks have gained prominence as a dynamic paradigm for delivering personalized suggestions via interactive dialogues. The incorporation of advanced language understanding techniques has substantially…

Computation and Language · Computer Science 2025-03-17 Guanrong Li , Kuo Tian , Jinnan Qi , Qinghan Fu , Zhen Wu , Xinyu Dai

Sequential Recommender Systems (SRSs) are a popular type of recommender system that learns from a user's history to predict the next item they are likely to interact with. However, user interactions can be affected by noise stemming from…

Information Retrieval · Computer Science 2024-04-18 Andrea Bacciu , Federico Siciliano , Nicola Tonellotto , Fabrizio Silvestri