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Research has shown that recommender systems are typically biased towards popular items, which leads to less popular items being underrepresented in recommendations. The recent work of Abdollahpouri et al. in the context of movie…

Information Retrieval · Computer Science 2019-12-20 Dominik Kowald , Markus Schedl , Elisabeth Lex

Recommender systems have become an integral part of our daily online experience by analyzing past user behavior to suggest relevant content in entertainment domains such as music, movies, and books. Today, they are among the most widely…

Information Retrieval · Computer Science 2025-05-14 Dominik Kowald

We explore the fairness issue that arises in recommender systems. Biased data due to inherent stereotypes of particular groups (e.g., male students' average rating on mathematics is often higher than that on humanities, and vice versa for…

Machine Learning · Computer Science 2022-10-13 Jaewoong Cho , Moonseok Choi , Changho Suh

The proliferation of personalized recommendation technologies has raised concerns about discrepancies in their recommendation performance across different genders, age groups, and racial or ethnic populations. This varying degree of…

Information Retrieval · Computer Science 2020-02-19 Masoud Mansoury , Himan Abdollahpouri , Jessie Smith , Arman Dehpanah , Mykola Pechenizkiy , Bamshad Mobasher

The lack of bias management in Recommender Systems leads to minority groups receiving unfair recommendations. Moreover, the trade-off between equity and precision makes it difficult to obtain recommendations that meet both criteria. Here we…

Machine Learning · Computer Science 2020-12-22 Jesús Bobadilla , Raúl Lara-Cabrera , Ángel González-Prieto , Fernando Ortega

Fairness in AI-driven decision-making systems has become a critical concern, especially when these systems directly affect human lives. This paper explores the public's comprehension of fairness in healthcare recommendations. We conducted a…

Machine Learning · Computer Science 2024-09-10 Veronica Kecki , Alan Said

Recommender systems often suffer from popularity bias, where popular items are overly recommended while sacrificing unpopular items. Existing researches generally focus on ensuring the number of recommendations exposure of each item is…

Information Retrieval · Computer Science 2023-05-10 Yuanhao Liu , Qi Cao , Huawei Shen , Yunfan Wu , Shuchang Tao , Xueqi Cheng

Algorithmic decision-making systems are increasingly used throughout the public and private sectors to make important decisions or assist humans in making these decisions with real social consequences. While there has been substantial…

Human-Computer Interaction · Computer Science 2020-01-28 Ruotong Wang , F. Maxwell Harper , Haiyi Zhu

Personalized recommendation brings about novel challenges in ensuring fairness, especially in scenarios in which users are not the only stakeholders involved in the recommender system. For example, the system may want to ensure that items…

Information Retrieval · Computer Science 2018-09-14 Weiwen Liu , Robin Burke

Popularity bias and positivity bias are two prominent sources of bias in recommender systems. Both arise from input data, propagate through recommendation models, and lead to unfair or suboptimal outcomes. Popularity bias occurs when a…

Information Retrieval · Computer Science 2026-01-21 Masoud Mansoury , Jin Huang , Mykola Pechenizkiy , Herke van Hoof , Maarten de Rijke

Decision making in crucial applications such as lending, hiring, and college admissions has witnessed increasing use of algorithmic models and techniques as a result of a confluence of factors such as ubiquitous connectivity, ability to…

Artificial Intelligence · Computer Science 2020-09-08 G Roshan Lal , Sahin Cem Geyik , Krishnaram Kenthapadi

As one of the most pervasive applications of machine learning, recommender systems are playing an important role on assisting human decision making. The satisfaction of users and the interests of platforms are closely related to the quality…

Information Retrieval · Computer Science 2023-08-04 Yunqi Li , Hanxiong Chen , Shuyuan Xu , Yingqiang Ge , Juntao Tan , Shuchang Liu , Yongfeng Zhang

Recommender systems have become a pervasive part of our daily online experience, and are one of the most widely used applications of artificial intelligence and machine learning. Therefore, regulations and requirements for trustworthy…

Information Retrieval · Computer Science 2024-07-01 Dominik Kowald

Recommendation systems today exert a strong influence on consumer behavior and individual perceptions of the world. By using collaborative filtering (CF) methods to create recommendations, it generates a continuous feedback loop in which…

Information Retrieval · Computer Science 2020-02-05 Sunshine Chong , Andrés Abeliuk

Recommender systems leverage extensive user interaction data to model preferences; however, directly modeling these data may introduce biases that disproportionately favor popular items. In this paper, we demonstrate that popularity bias…

Information Retrieval · Computer Science 2025-04-21 Jiahao Liu , Dongsheng Li , Hansu Gu , Peng Zhang , Tun Lu , Li Shang , Ning Gu

Recommendation algorithms are known to suffer from popularity bias; a few popular items are recommended frequently while the majority of other items are ignored. These recommendations are then consumed by the users, their reaction will be…

Information Retrieval · Computer Science 2020-07-28 Masoud Mansoury , Himan Abdollahpouri , Mykola Pechenizkiy , Bamshad Mobasher , Robin Burke

Recommender systems are one of the most widely used services on several online platforms to suggest potential items to the end-users. These services often use different machine learning techniques for which fairness is a concerning factor,…

Artificial Intelligence · Computer Science 2020-11-11 Aadi Swadipto Mondal , Rakesh Bal , Sayan Sinha , Gourab K Patro

Though recommender systems are defined by personalization, recent work has shown the importance of additional, beyond-accuracy objectives, such as fairness. Because users often expect their recommendations to be purely personalized, these…

Information Retrieval · Computer Science 2021-03-17 Nasim Sonboli , Jessie J. Smith , Florencia Cabral Berenfus , Robin Burke , Casey Fiesler

Well-calibrated predictions of user preferences are essential for many applications. Since recommender systems typically select the top-N items for users, calibration for those top-N items, rather than for all items, is important. We show…

Information Retrieval · Computer Science 2024-08-22 Masahiro Sato

Items popularity is a strong signal in recommendation algorithms. It strongly affects collaborative filtering approaches and it has been proven to be a very good baseline in terms of results accuracy. Even though we miss an actual…

Information Retrieval · Computer Science 2019-07-09 Vito Walter Anelli , Tommaso Di Noia , Eugenio Di Sciascio , Azzurra Ragone , Joseph Trotta