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Related papers: The Unfairness of Popularity Bias in Recommendatio…

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Popularity bias is a well-known issue in recommender systems where few popular items are over-represented in the input data, while majority of other less popular items are under-represented. This disparate representation often leads to bias…

Information Retrieval · Computer Science 2023-10-05 Masoud Mansoury , Finn Duijvestijn , Imane Mourabet

Recent studies have shown that recommendation systems commonly suffer from popularity bias. Popularity bias refers to the problem that popular items (i.e., frequently rated items) are recommended frequently while less popular items are…

Information Retrieval · Computer Science 2022-03-01 Mohammadmehdi Naghiaei , Hossein A. Rahmani , Mahdi Dehghan

Recommender systems help people find relevant content in a personalized way. One main promise of such systems is that they are able to increase the visibility of items in the long tail, i.e., the lesser-known items in a catalogue. Existing…

Information Retrieval · Computer Science 2024-07-03 Anastasiia Klimashevskaia , Dietmar Jannach , Mehdi Elahi , Christoph Trattner

Academic research in recommender systems has been greatly focusing on the accuracy-related measures of recommendations. Even when non-accuracy measures such as popularity bias, diversity, and novelty are studied, it is often solely from the…

Information Retrieval · Computer Science 2020-07-03 Himan Abdollahpouri , Masoud Mansoury

Popularity bias is a well-known phenomenon in recommender systems: popular items are recommended even more frequently than their popularity would warrant, amplifying long-tail effects already present in many recommendation domains. Prior…

Information Retrieval · Computer Science 2020-07-27 Himan Abdollahpouri , Masoud Mansoury , Robin Burke , Bamshad Mobasher

Traditionally, especially in academic research in recommender systems, the focus has been solely on the satisfaction of the end-user. While user satisfaction has, indeed, been associated with the success of the business, it is not the only…

Information Retrieval · Computer Science 2020-08-20 Himan Abdollahpouri

Recently there has been a growing interest in fairness-aware recommender systems, including fairness in providing consistent performance across different users or groups of users. A recommender system could be considered unfair if the…

Information Retrieval · Computer Science 2019-10-17 Himan Abdollahpouri , Masoud Mansoury , Robin Burke , Bamshad Mobasher

Many recommender systems suffer from popularity bias: popular items are recommended frequently while less popular, niche products, are recommended rarely or not at all. However, recommending the ignored products in the `long tail' is…

Information Retrieval · Computer Science 2019-08-13 Himan Abdollahpouri , Robin Burke , Bamshad Mobasher

Fairness in machine learning has been studied by many researchers. In particular, fairness in recommender systems has been investigated to ensure the recommendations meet certain criteria with respect to certain sensitive features such as…

Information Retrieval · Computer Science 2020-03-27 Himan Abdollahpouri , Robin Burke , Masoud Mansoury

Recommendation and ranking systems are known to suffer from popularity bias; the tendency of the algorithm to favor a few popular items while under-representing the majority of other items. Prior research has examined various approaches for…

Information Retrieval · Computer Science 2021-03-12 Himan Abdollahpouri , Masoud Mansoury , Robin Burke , Bamshad Mobasher , Edward Malthouse

Recommender systems learn from historical users' feedback that is often non-uniformly distributed across items. As a consequence, these systems may end up suggesting popular items more than niche items progressively, even when the latter…

Information Retrieval · Computer Science 2020-10-06 Ludovico Boratto , Gianni Fenu , Mirko Marras

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

Nowadays, with the increase in the amount of information generated in the webspace, many web service providers try to use recommender systems to personalize their services and make accessing the content convenient. Recommender systems that…

Information Retrieval · Computer Science 2021-12-07 Reza Shafiloo , Marjan Kaedi , Ali Pourmiri

Recommender Systems (RS) often suffer from popularity bias, where a small set of popular items dominate the recommendation results due to their high interaction rates, leaving many less popular items overlooked. This phenomenon…

Information Retrieval · Computer Science 2025-05-27 Juno Prent , Masoud Mansoury

Many recommender systems suffer from the popularity bias problem: popular items are being recommended frequently while less popular, niche products, are recommended rarely if not at all. However, those ignored products are exactly the…

Information Retrieval · Computer Science 2018-12-06 Himan Abdollahpouri , Robin Burke , Bamshad Mobasher

Recently there has been a growing interest in fairness-aware recommender systems including fairness in providing consistent performance across different users or groups of users. A recommender system could be considered unfair if the…

Information Retrieval · Computer Science 2020-08-24 Himan Abdollahpouri , Masoud Mansoury , Robin Burke , Bamshad Mobasher

Many recommendation algorithms suffer from popularity bias: a small number of popular items being recommended too frequently, while other items get insufficient exposure. Research in this area so far has concentrated on a one-shot…

Information Retrieval · Computer Science 2019-06-28 Himan Abdollahpouri , Robin Burke

As a highly data-driven application, recommender systems could be affected by data bias, resulting in unfair results for different data groups, which could be a reason that affects the system performance. Therefore, it is important to…

Information Retrieval · Computer Science 2021-04-22 Yunqi Li , Hanxiong Chen , Zuohui Fu , Yingqiang Ge , Yongfeng Zhang

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

Point-of-Interest (POI) recommender systems provide personalized recommendations to users and help businesses attract potential customers. Despite their success, recent studies suggest that highly data-driven recommendations could be…

Information Retrieval · Computer Science 2022-04-11 Hossein A. Rahmani , Yashar Deldjoo , Ali Tourani , Mohammadmehdi Naghiaei
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