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The issue of popularity bias -- where popular items are disproportionately recommended, overshadowing less popular but potentially relevant items -- remains a significant challenge in recommender systems. Recent advancements have seen the…

Information Retrieval · Computer Science 2024-06-04 Jan Malte Lichtenberg , Alexander Buchholz , Pola Schwöbel

This work takes a critical stance on previous studies concerning fairness evaluation in Large Language Model (LLM)-based recommender systems, which have primarily assessed consumer fairness by comparing recommendation lists generated with…

Information Retrieval · Computer Science 2025-02-24 Yashar Deldjoo , Tommaso di Noia

Recommendation systems for Web content distribution intricately connect to the information access and exposure opportunities for vulnerable populations. The emergence of Large Language Models-based Recommendation System (LRS) may introduce…

Information Retrieval · Computer Science 2024-02-26 Meng Jiang , Keqin Bao , Jizhi Zhang , Wenjie Wang , Zhengyi Yang , Fuli Feng , Xiangnan He

The rapid adoption of large language models (LLMs) in recommender systems (RS) presents new challenges in understanding and evaluating their biases, which can result in unfairness or the amplification of stereotypes. Traditional fairness…

Information Retrieval · Computer Science 2024-09-12 Yashar Deldjoo , Fatemeh Nazary

Large Language Models (LLMs) have revolutionized Recommender Systems (RS) through advanced generative user modeling. However, LLM-based RS (LLM-RS) often inadvertently perpetuates bias present in the training data, leading to severe…

Information Retrieval · Computer Science 2026-02-03 Jin Li , Huilin Gu , Shoujin Wang , Qi Zhang , Shui Yu , Chen Wang , Xiwei Xu , Fang Chen

Recommendation systems often suffer from data sparsity caused by limited user-item interactions, which degrade their performance and amplify popularity bias in real-world scenarios. This paper proposes a novel data augmentation framework…

Information Retrieval · Computer Science 2026-04-22 Minh-Anh Nguyen , Bao Nguyen , Ha Lan N. T. , Tuan Anh Hoang , Duc-Trong Le , Dung D. Le

The rapid development of Large Language Models (LLMs) creates new opportunities for recommender systems, especially by exploiting the side information (e.g., descriptions and analyses of items) generated by these models. However, aligning…

Information Retrieval · Computer Science 2025-04-14 Guixian Zhang , Guan Yuan , Debo Cheng , Lin Liu , Jiuyong Li , Shichao Zhang

Large Language Models (LLMs) excel in various tasks, including personalized recommendations. Existing evaluation methods often focus on rating prediction, relying on regression errors between actual and predicted ratings. However, user…

Computation and Language · Computer Science 2025-01-24 Zhaoxuan Tan , Zinan Zeng , Qingkai Zeng , Zhenyu Wu , Zheyuan Liu , Fengran Mo , Meng Jiang

The remarkable achievements of Large Language Models (LLMs) have led to the emergence of a novel recommendation paradigm -- Recommendation via LLM (RecLLM). Nevertheless, it is important to note that LLMs may contain social prejudices, and…

Information Retrieval · Computer Science 2023-10-18 Jizhi Zhang , Keqin Bao , Yang Zhang , Wenjie Wang , Fuli Feng , Xiangnan He

The application of large language models (LLMs) in recommendation systems has recently gained traction. Traditional recommendation systems often lack explainability and suffer from issues such as popularity bias. Previous research has also…

Information Retrieval · Computer Science 2025-12-04 Yaqi Wang , Haojia Sun , Shuting Zhang

As large language models (LLMs) are increasingly deployed in real-world applications, ensuring their fair responses across demographics has become crucial. Despite many efforts, an ongoing challenge is hidden bias: LLMs appear fair under…

Computation and Language · Computer Science 2026-02-05 Kahee Lim , Soyeon Kim , Steven Euijong Whang

Generating fair and accurate predictions plays a pivotal role in deploying large language models (LLMs) in the real world. However, existing debiasing methods inevitably generate unfair or incorrect predictions as they are designed and…

Computation and Language · Computer Science 2025-02-28 Ruizhe Chen , Yichen Li , Jianfei Yang , Joey Tianyi Zhou , Jian Wu , Zuozhu Liu

With the rapid development of online services, recommender systems (RS) have become increasingly indispensable for mitigating information overload. Despite remarkable progress, conventional recommendation models (CRM) still have some…

Information Retrieval · Computer Science 2024-07-10 Jianghao Lin , Xinyi Dai , Yunjia Xi , Weiwen Liu , Bo Chen , Hao Zhang , Yong Liu , Chuhan Wu , Xiangyang Li , Chenxu Zhu , Huifeng Guo , Yong Yu , Ruiming Tang , Weinan Zhang

Large language models (LLMs) have recently been used as backbones for recommender systems. However, their performance often lags behind conventional methods in standard tasks like retrieval. We attribute this to a mismatch between LLMs'…

Information Retrieval · Computer Science 2024-04-02 Yuwei Cao , Nikhil Mehta , Xinyang Yi , Raghunandan Keshavan , Lukasz Heldt , Lichan Hong , Ed H. Chi , Maheswaran Sathiamoorthy

Large Language Models (LLMs) have demonstrated unprecedented language understanding and reasoning capabilities to capture diverse user preferences and advance personalized recommendations. Despite the growing interest in LLM-based…

Information Retrieval · Computer Science 2025-04-30 Zihuai Zhao , Wenqi Fan , Yao Wu , Qing Li

The paper underscores the significance of Large Language Models (LLMs) in reshaping recommender systems, attributing their value to unique reasoning abilities absent in traditional recommenders. Unlike conventional systems lacking direct…

Information Retrieval · Computer Science 2024-03-20 Arpita Vats , Vinija Jain , Rahul Raja , Aman Chadha

Recommender systems for software engineering (RSSE) play a crucial role in automating development tasks by providing relevant suggestions according to the developer's context. However, they suffer from the so-called popularity bias, i.e.,…

Software Engineering · Computer Science 2025-01-20 Claudio Di Sipio , Juri Di Rocco , Davide Di Ruscio , Vladyslav Bulhakov

The rise of generative artificial intelligence, particularly Large Language Models (LLMs), has intensified the imperative to scrutinize fairness alongside accuracy. Recent studies have begun to investigate fairness evaluations for LLMs…

Information Retrieval · Computer Science 2024-08-31 Chandan Kumar Sah , Lian Xiaoli , Muhammad Mirajul Islam

Large Language Model (LLM)-based recommendation systems excel in delivering comprehensive suggestions by deeply analyzing content and user behavior. However, they often inherit biases from skewed training data, favoring mainstream content…

Information Retrieval · Computer Science 2026-02-02 Anindya Bijoy Das , Shahnewaz Karim Sakib

Recommender systems are crucial for personalizing user experiences but often depend on implicit feedback data, which can be noisy and misleading. Existing denoising studies involve incorporating auxiliary information or learning strategies…

Information Retrieval · Computer Science 2025-02-14 Shuyao Wang , Zhi Zheng , Yongduo Sui , Hui Xiong
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