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Recent works in recommendation systems have focused on diversity in recommendations as an important aspect of recommendation quality. In this work we argue that the post-processing algorithms aimed at only improving diversity among…

Computers and Society · Computer Science 2018-07-18 Jurek Leonhardt , Avishek Anand , Megha Khosla

We study fairness in collaborative-filtering recommender systems, which are sensitive to discrimination that exists in historical data. Biased data can lead collaborative-filtering methods to make unfair predictions for users from minority…

Information Retrieval · Computer Science 2017-12-04 Sirui Yao , Bert Huang

Recommender systems are widely used to provide personalized recommendations to users. Recent research has shown that recommender systems may be subject to different types of biases, such as popularity bias, leading to an uneven distribution…

Information Retrieval · Computer Science 2023-10-03 Giovanni Pellegrini , Vittorio Maria Faraco , Yashar Deldjoo

Recommender systems (RSs) employ user-item feedback, e.g., ratings, to match customers to personalized lists of products. Approaches to top-k recommendation mainly rely on Learning-To-Rank algorithms and, among them, the most widely adopted…

Information Retrieval · Computer Science 2021-07-30 Vito Walter Anelli , Yashar Deldjoo , Tommaso Di Noia , Felice Antonio Merra

Algorithmic fairness in recommender systems requires close attention to the needs of a diverse set of stakeholders that may have competing interests. Previous work in this area has often been limited by fixed, single-objective definitions…

Information Retrieval · Computer Science 2024-10-08 Amanda Aird , Elena Štefancová , Cassidy All , Amy Voida , Martin Homola , Nicholas Mattei , Robin Burke

We study the probabilistic assignment of items to platforms that satisfies both group and individual fairness constraints. Each item belongs to specific groups and has a preference ordering over platforms. Each platform enforces group…

Artificial Intelligence · Computer Science 2024-05-13 Atasi Panda , Anand Louis , Prajakta Nimbhorkar

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

Fair ranking problems arise in many decision-making processes that often necessitate a trade-off between accuracy and fairness. Many existing studies have proposed correction methods such as adding fairness constraints to a ranking model's…

Machine Learning · Computer Science 2022-04-26 Ryosuke Sonoda

Teaching unbiased decision-making is crucial for addressing biased decision-making in daily life. Although both raising awareness of personal biases and providing guidance on unbiased decision-making are essential, the latter topics remains…

Human-Computer Interaction · Computer Science 2024-04-09 Mingzhe Yang , Hiromi Arai , Naomi Yamashita , Yukino Baba

Pairwise learning strategies are prevalent for optimizing recommendation models on implicit feedback data, which usually learns user preference by discriminating between positive (i.e., clicked by a user) and negative items (i.e., obtained…

Information Retrieval · Computer Science 2023-02-17 Xiao Chen , Wenqi Fan , Jingfan Chen , Haochen Liu , Zitao Liu , Zhaoxiang Zhang , Qing Li

Motivated by concerns that machine learning algorithms may introduce significant bias in classification models, developing fair classifiers has become an important problem in machine learning research. One important paradigm towards this…

Machine Learning · Computer Science 2019-01-30 L. Elisa Celis , Vijay Keswani

Ranking is a ubiquitous method for focusing the attention of human evaluators on a manageable subset of options. Its use as part of human decision-making processes ranges from surfacing potentially relevant products on an e-commerce site to…

Machine Learning · Computer Science 2024-10-31 Richa Rastogi , Thorsten Joachims

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

Personalization is pervasive in the online space as, when combined with learning, it leads to higher efficiency and revenue by allowing the most relevant content to be served to each user. However, recent studies suggest that such…

Computers and Society · Computer Science 2017-07-10 L. Elisa Celis , Nisheeth K. Vishnoi

Rankings have become the primary interface in two-sided online markets. Many have noted that the rankings not only affect the satisfaction of the users (e.g., customers, listeners, employers, travelers), but that the position in the ranking…

Information Retrieval · Computer Science 2022-08-31 Yuta Saito , Thorsten Joachims

Items from a database are often ranked based on a combination of multiple criteria. A user may have the flexibility to accept combinations that weigh these criteria differently, within limits. On the other hand, this choice of weights can…

Databases · Computer Science 2023-04-27 Abolfazl Asudeh , H. V. Jagadish , Julia Stoyanovich , Gautam Das

Item recommendation is the task of predicting a personalized ranking on a set of items (e.g. websites, movies, products). In this paper, we investigate the most common scenario with implicit feedback (e.g. clicks, purchases). There are many…

Information Retrieval · Computer Science 2012-05-14 Steffen Rendle , Christoph Freudenthaler , Zeno Gantner , Lars Schmidt-Thieme

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

Increasing users' positive interactions, such as purchases or clicks, is an important objective of recommender systems. Recommenders typically aim to select items that users will interact with. If the recommended items are purchased, an…

Machine Learning · Computer Science 2020-09-24 Masahiro Sato , Sho Takemori , Janmajay Singh , Tomoko Ohkuma

Item recommendation task predicts a personalized ranking over a set of items for each individual user. One paradigm is the rating-based methods that concentrate on explicit feedbacks and hence face the difficulties in collecting them.…

Information Retrieval · Computer Science 2021-01-15 Guang-Neng Hu , Xin-Yu Dai