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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

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

Recommender systems are known to suffer from the popularity bias problem: popular (i.e. frequently rated) items get a lot of exposure while less popular ones are under-represented in the recommendations. Research in this area has been…

Information Retrieval · Computer Science 2019-09-20 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

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

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

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

Standard collaborative filtering approaches for top-N recommendation are biased toward popular items. As a result, they recommend items that users are likely aware of and under-represent long-tail items. This is inadequate, both for…

Information Retrieval · Computer Science 2018-03-02 Zainab Zolaktaf , Reza Babanezhad , Rachel Pottinger

The observed ratings in most recommender systems are subjected to popularity bias and are thus not randomly missing. Due to this, only a few popular items are recommended, and a vast number of non-popular items are hardly recommended. Not…

Information Retrieval · Computer Science 2021-09-14 Ajay Gangwar , Shweta Jain

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

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

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

In many recommendations, a handful of popular items (e.g., movies / television shows, news, etc.) can be dominant in recommendations for many users. However, we know that in a large catalog of items, users are likely interested in more than…

Information Retrieval · Computer Science 2024-07-30 Qiuling Xu , Pannaga Shivaswamy , Xiangyu Zhang

Accurate predictions in session-based recommendations have progressed, but a few studies have focused on skewed recommendation lists caused by popularity bias. Existing models for mitigating popularity bias have attempted to reduce the…

Information Retrieval · Computer Science 2022-10-24 Jiayi Chen , Wen Wu , Wei Zheng , Liang He

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

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

Recommender systems play a crucial role in shaping information we encounter online, whether on social media or when using content platforms, thereby influencing our beliefs, choices, and behaviours. Many recent works address the issue of…

Information Retrieval · Computer Science 2024-10-07 Václav Blahut , Karel Koupil

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

Recommender systems learn from historical user-item interactions to identify preferred items for target users. These observed interactions are usually unbalanced following a long-tailed distribution. Such long-tailed data lead to popularity…

Information Retrieval · Computer Science 2022-11-03 Weijieying Ren , Lei Wang , Kunpeng Liu , Ruocheng Guo , Lim Ee Peng , Yanjie Fu

The success of "infinite-inventory" retailers such as Amazon.com and Netflix has been largely attributed to a "long tail" phenomenon. Although the majority of their inventory is not in high demand, these niche products, unavailable at…

Databases · Computer Science 2012-05-31 Hongzhi Yin , Bin Cui , Jing Li , Junjie Yao , Chen Chen
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