Recommendation to Groups of Users Using the Singularities Concept
Recommendation to a group of users is a big challenge for collaborative filtering. The recommendations to groups of users arise from the convenience of being able to recommend a group of users about products or services that satisfy the entire group. In this paper, we propose the similarity measure...
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doaj-89ae760fff7e4d1b8b124f0b87d7bd1d2021-03-29T20:59:20ZengIEEEIEEE Access2169-35362018-01-016397453976110.1109/ACCESS.2018.28531078404036Recommendation to Groups of Users Using the Singularities ConceptFernando Ortega0https://orcid.org/0000-0003-4765-1479Remigio Hurtado1https://orcid.org/0000-0001-7472-9417Jesus Bobadilla2https://orcid.org/0000-0003-0619-1322Rodolfo Bojorque3https://orcid.org/0000-0002-6045-8692U-tad: Centro Universitario de Tecnología y Arte Digital, Las Rozas, Madrid, SpainDepartment of Information Systems, Universidad Politécnica de Madrid, Madrid, SpainDepartment of Information Systems, Universidad Politécnica de Madrid, Madrid, SpainDepartment of Information Systems, Universidad Politécnica de Madrid, Madrid, SpainRecommendation to a group of users is a big challenge for collaborative filtering. The recommendations to groups of users arise from the convenience of being able to recommend a group of users about products or services that satisfy the entire group. In this paper, we propose the similarity measure SMGU, tailored for collaborative filtering recommendations to groups of users. This similarity measure combines both numerical and non-numerical information. Numerical information is weighted attending to the rating singularity of the group members. This paper focuses on the assumption that the singularity of the ratings cast by the users of the group is relevant information for finding suitable neighbors. For each item, we consider that a rating is singular for a group or for a user when that rating is different from the majority of the rating cast by the other users. Non-numerical structural information can be considered as valuable to match group preferences with neighbors preferences. Experiments have been run using open recommender systems data sets. Compared with representative baselines, results show accuracy improvements when the proposed method is used. Additionally, this paper provides a section devoted to the experiments reproducibility issue. Finally, this paper opens opportunities to face new challenges in the recommendation to a group of users: explanation of recommendations, determination of reliability measures, and improvement of accuracy, novelty, and diversity results.https://ieeexplore.ieee.org/document/8404036/Recommendation to groupsgroup of userscollaborative filteringrecommender systemssingularity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fernando Ortega Remigio Hurtado Jesus Bobadilla Rodolfo Bojorque |
spellingShingle |
Fernando Ortega Remigio Hurtado Jesus Bobadilla Rodolfo Bojorque Recommendation to Groups of Users Using the Singularities Concept IEEE Access Recommendation to groups group of users collaborative filtering recommender systems singularity |
author_facet |
Fernando Ortega Remigio Hurtado Jesus Bobadilla Rodolfo Bojorque |
author_sort |
Fernando Ortega |
title |
Recommendation to Groups of Users Using the Singularities Concept |
title_short |
Recommendation to Groups of Users Using the Singularities Concept |
title_full |
Recommendation to Groups of Users Using the Singularities Concept |
title_fullStr |
Recommendation to Groups of Users Using the Singularities Concept |
title_full_unstemmed |
Recommendation to Groups of Users Using the Singularities Concept |
title_sort |
recommendation to groups of users using the singularities concept |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2018-01-01 |
description |
Recommendation to a group of users is a big challenge for collaborative filtering. The recommendations to groups of users arise from the convenience of being able to recommend a group of users about products or services that satisfy the entire group. In this paper, we propose the similarity measure SMGU, tailored for collaborative filtering recommendations to groups of users. This similarity measure combines both numerical and non-numerical information. Numerical information is weighted attending to the rating singularity of the group members. This paper focuses on the assumption that the singularity of the ratings cast by the users of the group is relevant information for finding suitable neighbors. For each item, we consider that a rating is singular for a group or for a user when that rating is different from the majority of the rating cast by the other users. Non-numerical structural information can be considered as valuable to match group preferences with neighbors preferences. Experiments have been run using open recommender systems data sets. Compared with representative baselines, results show accuracy improvements when the proposed method is used. Additionally, this paper provides a section devoted to the experiments reproducibility issue. Finally, this paper opens opportunities to face new challenges in the recommendation to a group of users: explanation of recommendations, determination of reliability measures, and improvement of accuracy, novelty, and diversity results. |
topic |
Recommendation to groups group of users collaborative filtering recommender systems singularity |
url |
https://ieeexplore.ieee.org/document/8404036/ |
work_keys_str_mv |
AT fernandoortega recommendationtogroupsofusersusingthesingularitiesconcept AT remigiohurtado recommendationtogroupsofusersusingthesingularitiesconcept AT jesusbobadilla recommendationtogroupsofusersusingthesingularitiesconcept AT rodolfobojorque recommendationtogroupsofusersusingthesingularitiesconcept |
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