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In this paper, we introduce a novel approach to improve the diversity of Top-N recommendations while maintaining accuracy. Our approach employs a user-centric pre-processing strategy aimed at exposing users to a wide array of content…

Information Retrieval · Computer Science 2025-02-05 Manel Slokom , Savvina Danil , Laura Hollink

Data bias, e.g., popularity impairs the dynamics of two-sided markets within recommender systems. This overshadows the less visible but potentially intriguing long-tail items that could capture user interest. Despite the abundance of…

Information Retrieval · Computer Science 2024-06-26 Zhichen Xiang , Hongke Zhao , Chuang Zhao , Ming He , Jianping Fan

The challenge of balancing user relevance and content diversity in recommender systems is increasingly critical amid growing concerns about content homogeneity and reduced user engagement. In this work, we propose a novel framework that…

Information Retrieval · Computer Science 2025-06-30 Hiba Bederina , Jill-Jênn Vie

Relevance and diversity are both important to the success of recommender systems, as they help users to discover from a large pool of items a compact set of candidates that are not only interesting but exploratory as well. The challenge is…

Machine Learning · Computer Science 2020-09-29 Yifang Liu , Zhentao Xu , Qiyuan An , Yang Yi , Yanzhi Wang , Trevor Hastie

Recommender systems serve the dual purpose of presenting relevant content to users and helping content creators reach their target audience. The dual nature of these systems naturally influences both users and creators: users' preferences…

Information Retrieval · Computer Science 2024-11-04 Tao Lin , Kun Jin , Andrew Estornell , Xiaoying Zhang , Yiling Chen , Yang Liu

Providing recommendations that are both relevant and diverse is a key consideration of modern recommender systems. Optimizing both of these measures presents a fundamental trade-off, as higher diversity typically comes at the cost of…

Information Retrieval · Computer Science 2024-08-08 Erica Coppolillo , Giuseppe Manco , Aristides Gionis

With the rapid development of recommender systems, accuracy is no longer the only golden criterion for evaluating whether the recommendation results are satisfying or not. In recent years, diversity has gained tremendous attention in…

Information Retrieval · Computer Science 2019-05-17 Qiong Wu , Yong Liu , Chunyan Miao , Yin Zhao , Lu Guan , Haihong Tang

Recommendation systems are pervasive in the digital economy. An important assumption in many deployed systems is that user consumption reflects user preferences in a static sense: users consume the content they like with no other…

Computers and Society · Computer Science 2023-02-14 Andreas Haupt , Dylan Hadfield-Menell , Chara Podimata

In a news recommender system, a reader's preferences change over time. Some preferences drift quite abruptly (short-term preferences), while others change over a longer period of time (long-term preferences). Although the existing news…

Information Retrieval · Computer Science 2021-03-24 Shaina Raza

Recommender systems often operate on item catalogs clustered by genres, and user bases that have natural clusterings into user types by demographic or psychographic attributes. Prior work on system-wide diversity has mainly focused on…

Information Retrieval · Computer Science 2019-08-28 Arda Antikacioglu , Tanvi Bajpai , R. Ravi

Diversifying return results is an important research topic in retrieval systems in order to satisfy both the various interests of customers and the equal market exposure of providers. There has been growing attention on diversity-aware…

Information Retrieval · Computer Science 2024-02-20 Haolun Wu , Yansen Zhang , Chen Ma , Fuyuan Lyu , Bowei He , Bhaskar Mitra , Xue Liu

Standard reinforcement learning methods aim to master one way of solving a task whereas there may exist multiple near-optimal policies. Being able to identify this collection of near-optimal policies can allow a domain expert to efficiently…

Machine Learning · Computer Science 2019-06-04 Muhammad A. Masood , Finale Doshi-Velez

Recommender systems are vital for shaping user online experiences. While some believe they may limit new content exploration and promote opinion polarization, a systematic analysis is still lacking. We present a model that explores the…

Physics and Society · Physics 2023-12-15 Giordano De Marzo , Pietro Gravino , Vittorio Loreto

Using multiple carousels, lists that wrap around and can be scrolled, is the basis for offering content in most contemporary movie streaming platforms. Carousels allow for highlighting different aspects of users' taste, that fall in…

Information Retrieval · Computer Science 2025-11-19 Daniël Wilten , Gideon Maillette de Buy Wenniger , Arjen Hommersom , Paul Lucassen , Emiel Poortman

Recently, interactive recommendation systems based on reinforcement learning have been attended by researchers due to the consider recommendation procedure as a dynamic process and update the recommendation model based on immediate user…

Information Retrieval · Computer Science 2021-11-01 Vahid Baghi , Seyed Mohammad Seyed Motehayeri , Ali Moeini , Rooholah Abedian

Diversity is an important factor in providing high-quality personalized news recommendations. However, most existing news recommendation methods only aim to optimize recommendation accuracy while ignoring diversity. Reranking is a widely…

Information Retrieval · Computer Science 2022-04-04 Chuhan Wu , Fangzhao Wu , Tao Qi , Yongfeng Huang

The design of recommendations strategies in the adaptive learning system focuses on utilizing currently available information to provide individual-specific learning instructions for learners. As a critical motivate for human behaviors,…

Computers and Society · Computer Science 2019-10-29 Ruijian Han , Kani Chen , Chunxi Tan

The need for diversification of recommendation lists manifests in a number of recommender systems use cases. However, an increase in diversity may undermine the utility of the recommendations, as relevant items in the list may be replaced…

Information Retrieval · Computer Science 2014-11-14 Azin Ashkan , Branislav Kveton , Shlomo Berkovsky , Zheng Wen

We propose and design recommendation systems that incentivize efficient exploration. Agents arrive sequentially, choose actions and receive rewards, drawn from fixed but unknown action-specific distributions. The recommendation system…

Computer Science and Game Theory · Computer Science 2026-04-02 Nicole Immorlica , Jieming Mao , Aleksandrs Slivkins , Zhiwei Steven Wu

Driven by the need to capture users' evolving interests and optimize their long-term experiences, more and more recommender systems have started to model recommendation as a Markov decision process and employ reinforcement learning to…

Information Retrieval · Computer Science 2021-11-02 Dell Zhang , Jun Wang
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