Group recommendation with temporal affinities

Sihem Amer-Yahia, Behrooz Omidvar-Tehrani, Senjuti Basu Roy, Nafiseh Shabib

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations

Abstract

We examine the problem of recommending items to ad-hoc user groups. Group recommendation in collaborative rating datasets has received increased attention recently and has raised novel challenges. Different consensus functions that aggregate the ratings of group members with varying semantics ranging from least misery to pairwise disagreement, have been studied. In this paper, we explore a new dimension when computing group recommendations, that is, affinity between group members and its evolution over time. We extend existing group recommendation semantics to include temporal affinity in recommendations and design GRECA, an efficient algorithm that produces temporal affinity-aware recommendations for ad-hoc groups. We run extensive experiments that show substantial improvements in group recommendation quality when accounting for affinity while maintaining very good performance.

Original languageEnglish (US)
Title of host publicationEDBT 2015 - 18th International Conference on Extending Database Technology, Proceedings
EditorsLucian Popa, Gustavo Alonso, Jan Van den Bussche, Pablo Barcelo, Jens Teubner, Jan Paredaens, Martin Ugarte, Floris Geerts
PublisherOpenProceedings.org, University of Konstanz, University Library
Pages421-432
Number of pages12
ISBN (Electronic)9783893180677
DOIs
StatePublished - Jan 1 2015
Externally publishedYes
Event18th International Conference on Extending Database Technology, EDBT 2015 - Brussels, Belgium
Duration: Mar 23 2015Mar 27 2015

Publication series

NameEDBT 2015 - 18th International Conference on Extending Database Technology, Proceedings

Other

Other18th International Conference on Extending Database Technology, EDBT 2015
Country/TerritoryBelgium
CityBrussels
Period3/23/153/27/15

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Software

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