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In the field of group recommendation systems (GRS), effectively addressing the diverse preferences of group members poses a significant challenge. Traditional GRS approaches often aggregate individual preferences into a collective group…

Information Retrieval · Computer Science 2025-03-18 Peijin Yu , Shin'ichi Konomi

Group recommender systems (GRS) are critical in discovering relevant items from a near-infinite inventory based on group preferences rather than individual preferences, like recommending a movie, restaurant, or tourist destination to a…

With ever-increasing amounts of online information available, modeling and predicting individual preferences-for books or articles, for example-is becoming more and more important. Good predictions enable us to improve advice to users, and…

Social and Information Networks · Computer Science 2017-02-06 Antonia Godoy-Lorite , Roger Guimera , Cristopher Moore , Marta Sales-Pardo

It has been an important task for recommender systems to suggest satisfying activities to a group of users in people's daily social life. The major challenge in this task is how to aggregate personal preferences of group members to infer…

Information Retrieval · Computer Science 2020-10-05 Hongzhi Yin , Qinyong Wang , Kai Zheng , Zhixu Li , Xiaofang Zhou

We present a new optimization method for the group selection problem in linear regression. In this problem, predictors are assumed to have a natural group structure and the goal is to select a small set of groups that best fits the…

Methodology · Statistics 2024-04-23 Anant Mathur , Sarat Moka , Benoit Liquet , Zdravko Botev

Group activities are important behaviors in human society, providing personalized recommendations for groups is referred to as the group recommendation task. Existing methods can usually be categorized into two strategies to infer group…

Information Retrieval · Computer Science 2024-09-05 Jinfeng Xu , Zheyu Chen , Jinze Li , Shuo Yang , Hewei Wang , Edith C. -H. Ngai

While recommender systems (RSs) traditionally rely on extensive individual user data, regulatory and technological shifts necessitate reliance on aggregated user information. This shift significantly impacts the recommendation process,…

Information Retrieval · Computer Science 2025-02-27 Gur Keinan , Omer Ben-Porat

Recommendation to groups of users is a challenging subfield of recommendation systems. Its key concept is how and where to make the aggregation of each set of user information into an individual entity, such as a ranked recommendation list,…

Information Retrieval · Computer Science 2023-03-14 Jorge Dueñas-Lerín , Raúl Lara-Cabrera , Fernando Ortega , Jesús Bobadilla

Group Recommender Systems (GRS) employing social choice-based aggregation strategies have previously been explored in terms of perceived consensus, fairness, and satisfaction. At the same time, the impact of textual explanations has been…

Human-Computer Interaction · Computer Science 2025-05-08 Cedric Waterschoot , Raciel Yera Toledo , Nava Tintarev , Francesco Barile

Group recommender systems facilitate group decision making for a set of individuals (e.g., a group of friends, a team, a corporation, etc.). Many of these systems, however, either assume that (i) user preferences can be elicited (or…

Artificial Intelligence · Computer Science 2021-03-16 Sarina Sajadi Ghaemmaghami , Amirali Salehi-Abari

The core of the general recommender systems lies in learning high-quality embedding representations of users and items to investigate their positional relations in the feature space. Unfortunately, data sparsity caused by…

Information Retrieval · Computer Science 2025-04-24 Yi Zhang , Yiwen Zhang

The way that people make choices or exhibit preferences can be strongly affected by the set of available alternatives, often called the choice set. Furthermore, there are usually heterogeneous preferences, either at an individual level…

Computer Science and Game Theory · Computer Science 2020-08-04 Kiran Tomlinson , Austin R. Benson

With the overwhelming online products available in recent years, there is an increasing need to filter and deliver relevant personalized advice for users. Recommender systems solve this problem by modeling and predicting individual…

Machine Learning · Statistics 2020-02-11 Antonia Godoy-Lorite , Roger Guimera , Marta Sales-Pardo

Collaborative filtering or recommender systems use a database about user preferences to predict additional topics or products a new user might like. In this paper we describe several algorithms designed for this task, including techniques…

Information Retrieval · Computer Science 2013-02-01 John S. Breese , David Heckerman , Carl Kadie

Since group activities have become very common in daily life, there is an urgent demand for generating recommendations for a group of users, referred to as group recommendation task. Existing group recommendation methods usually infer…

Information Retrieval · Computer Science 2023-02-08 Xixi Wu , Yun Xiong , Yao Zhang , Yizhu Jiao , Jiawei Zhang , Yangyong Zhu , Philip S. Yu

Given a set of items and a set of evaluators who all individually rank them, how do we aggregate these evaluations into a single societal ranking? Work in social choice and statistics has produced many aggregation methods for this problem,…

Computer Science and Game Theory · Computer Science 2025-08-26 Ratip Emin Berker , Ben Armstrong , Vincent Conitzer , Nihar B. Shah

Ensemble techniques have demonstrated remarkable success in improving predictive performance across various domains by aggregating predictions from multiple models [1]. In the realm of recommender systems, this research explores the…

Information Retrieval · Computer Science 2024-07-09 Zainil Mehta , Tobias Vente

Personalized recommender systems aim to predict users' preferences for items. It has become an indispensable part of online services. Online social platforms enable users to form groups based on their common interests. The users' group…

Information Retrieval · Computer Science 2023-11-17 Xiaolong Liu , Liangwei Yang , Zhiwei Liu , Xiaohan Li , Mingdai Yang , Chen Wang , Philip S. Yu

Recommender systems are designed to predict user preferences over collections of items. These systems process users' previous interactions to decide which items should be ranked higher to satisfy their desires. An ensemble recommender…

Information Retrieval · Computer Science 2023-06-23 Alireza Gharahighehi , Celine Vens , Konstantinos Pliakos

The group recommendation (GR) aims to suggest items for a group of users in social networks. Existing work typically considers individual preferences as the sole factor in aggregating group preferences. Actually, social influence is also an…

Information Retrieval · Computer Science 2025-04-16 Guangze Ye , Wen Wu , Guoqing Wang , Xi Chen , Hong Zheng , Liang He
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