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Related papers: LLM-Powered User Simulator for Recommender System

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The believable simulation of multi-user behavior is crucial for understanding complex social systems. Recently, large language models (LLMs)-based AI agents have made significant progress, enabling them to achieve human-like intelligence…

Artificial Intelligence · Computer Science 2024-12-16 Yijun Liu , Wu Liu , Xiaoyan Gu , Yong Rui , Xiaodong He , Yongdong Zhang

The emergence of Large Language Models (LLMs), has opened exciting possibilities for constructing computational simulations designed to replicate human behavior accurately. Current research suggests that LLM-based agents become increasingly…

Computation and Language · Computer Science 2024-12-18 Amir Taubenfeld , Yaniv Dover , Roi Reichart , Ariel Goldstein

Recent advances in large language models (LLMs) have enabled human-like social simulations at unprecedented scale and fidelity, offering new opportunities for computational social science. A key challenge, however, is the construction of…

Computation and Language · Computer Science 2025-10-07 Zhengyu Hu , Jianxun Lian , Zheyuan Xiao , Max Xiong , Yuxuan Lei , Tianfu Wang , Kaize Ding , Ziang Xiao , Nicholas Jing Yuan , Xing Xie

Social platforms serve as central hubs for information exchange, where user behaviors and platform interventions jointly shape opinions. However, intervention policies like recommendation and content filtering, can unintentionally amplify…

Social and Information Networks · Computer Science 2026-03-23 Renhong Huang , Ning Tang , Jiarong Xu , Yuxuan Cao , Qingqian Tu , Sheng Guo , Bo Zheng , Huiyuan Liu , Yang Yang

Modern large language models (LLMs) are typically trained and deployed using structured role tags (e.g. system, user, assistant, tool) that explicitly mark the source of each piece of context. While these tags are essential for instruction…

Computation and Language · Computer Science 2026-04-21 Xu Pan , Jingxuan Fan , Zidi Xiong , Ely Hahami , Jorin Overwiening , Ziqian Xie

The use of Large Language Models (LLMs) for simulating user behavior in the domain of Interactive Information Retrieval has recently gained significant popularity. However, their application and capabilities remain highly debated and…

Information Retrieval · Computer Science 2025-05-07 Andreas Konstantin Kruff , Timo Breuer , Philipp Schaer

The rapid advancement of Large Language Models (LLMs) has opened new opportunities in recommender systems by enabling zero-shot recommendation without conventional training. Despite their potential, most existing works rely solely on users'…

Computation and Language · Computer Science 2026-05-01 Seunghwan Bang , Hwanjun Song

We present SalesSim, a framework and testbed for evaluating the ability of Multimodal Large Language Models (MLLMs) to simulate realistic, persona-driven customer behavior in multi-turn, multi-modal, tool-augmented online retail…

Computation and Language · Computer Science 2026-05-12 Yada Pruksachatkun , Elaine Wan , Lyanna Chen , Kai-Wei Chang , Chien-Sheng Wu

As large language models (LLMs) improve in their capacity to serve as personal AI assistants, their ability to output uniquely tailored, personalized responses that align with the soft preferences of their users is essential for enhancing…

Human-Computer Interaction · Computer Science 2025-05-15 Jessica Y. Bo , Tianyu Xu , Ishan Chatterjee , Katrina Passarella-Ward , Achin Kulshrestha , D Shin

Simulators can provide valuable insights for researchers and practitioners who wish to improve recommender systems, because they allow one to easily tweak the experimental setup in which recommender systems operate, and as a result lower…

Information Retrieval · Computer Science 2024-04-09 Romain Deffayet , Thibaut Thonet , Dongyoon Hwang , Vassilissa Lehoux , Jean-Michel Renders , Maarten de Rijke

Large language models (LLMs) show potential as simulators of human behavior, offering a scalable way to study responses to interventions. However, because LLMs are trained largely on observational data, interventions in experiments with…

Computation and Language · Computer Science 2026-05-21 Victoria Lin , Taedong Yun , Maja Matarić , John Canny , Arthur Gretton , Alexander D'Amour

Personalized algorithms can inadvertently expose users to discomforting recommendations, potentially triggering negative consequences. The subjectivity of discomfort and the black-box nature of these algorithms make it challenging to…

Information Retrieval · Computer Science 2025-01-24 Jiahao Liu , Yiyang Shao , Peng Zhang , Dongsheng Li , Hansu Gu , Chao Chen , Longzhi Du , Tun Lu , Ning Gu

The integration of LLMOps into personalized recommendation systems marks a significant advancement in managing LLM-driven applications. This innovation presents both opportunities and challenges for enterprises, requiring specialized teams…

Information Retrieval · Computer Science 2024-04-02 Chenxi Shi , Penghao Liang , Yichao Wu , Tong Zhan , Zhengyu Jin

Conversational recommender systems (CRS) based on Large Language Models (LLMs) need to constantly be aligned to the user preferences to provide satisfying and context-relevant item recommendations. The traditional supervised fine-tuning…

Machine Learning · Computer Science 2025-08-08 Zhongheng Yang , Aijia Sun , Yushang Zhao , Yinuo Yang , Dannier Li , Chengrui Zhou

Sequential recommender infers users' evolving psychological motivations from historical interactions to recommend the next preferred items. Most existing methods compress recent behaviors into a single vector and optimize it toward a single…

Information Retrieval · Computer Science 2026-04-20 Yicheng Di , Yuan Liu , Zhi Chen , Jingcai Guo

Recommender systems have seen significant advancements with the influence of deep learning and graph neural networks, particularly in capturing complex user-item relationships. However, these graph-based recommenders heavily depend on…

Information Retrieval · Computer Science 2024-12-12 Xubin Ren , Wei Wei , Lianghao Xia , Lixin Su , Suqi Cheng , Junfeng Wang , Dawei Yin , Chao Huang

Accurately simulating human opinion dynamics is crucial for understanding a variety of societal phenomena, including polarization and the spread of misinformation. However, the agent-based models (ABMs) commonly used for such simulations…

Simulating nuanced user experiences within complex interactive search systems poses distinct challenge for traditional methodologies, which often rely on static user proxies or, more recently, on standalone large language model (LLM) agents…

Information Retrieval · Computer Science 2026-03-02 Saber Zerhoudi , Michael Granitzer

The rapid advancement of large language models (LLMs) has accelerated progress toward universal AI assistants. However, existing benchmarks for personalized assistants remain misaligned with real-world user-assistant interactions, failing…

Computation and Language · Computer Science 2026-03-13 Feiyu Duan , Xuanjing Huang , Zhongyu Wei

Large language models provide rich semantic priors and strong reasoning capabilities, making them promising auxiliary signals for recommendation. However, prevailing approaches either deploy LLMs as standalone recommender or apply global…

Information Retrieval · Computer Science 2025-12-29 Shanglin Yang , Zhan Shi