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CYTED-RITOS International Workshop on Groupware

CRIWG 2016: Collaboration and Technology pp 151–166Cite as

Hootle+: A Group Recommender System Supporting Preference Negotiation

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Part of the book series: Lecture Notes in Computer Science ((LNISA,volume 9848))

Abstract

This paper presents an approach to group recommender systems that focuses its attention on the group’s social interaction during the formulation, discussion and negotiation of the features the item to be jointly selected should possess. The system supports a collaborative preference elicitation and negotiation process where desired item features can be defined individually, but group consensus is needed for them to become active in the item filtering process. Users can provide feedback on other members’ preferences and change their significance, bringing up new recommendations each time individual settings are modified. The last stage in the decision process is also supported, when users collectively select the final item from the recommendation set. We developed the prototype hotel recommender Hootle+ and evaluated it in a user study involving groups of different size. The results indicate a good overall satisfaction, which increases with group size. However, the success ratio for bigger groups is lower than for small groups, raising questions for follow-up research.

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Authors and Affiliations

  1. University of Duisburg-Essen, Duisburg, Germany

    Jesús Omar Álvarez Márquez & Jürgen Ziegler

Authors
  1. Jesús Omar Álvarez Márquez
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  2. Jürgen Ziegler
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Corresponding author

Correspondence to Jesús Omar Álvarez Márquez .

Editor information

Editors and Affiliations

  1. Institute of Science and Technology , Ishikawa, Japan

    Takaya Yuizono

  2. Kyushu University , Fukuoka, Japan

    Hiroaki Ogata

  3. Universität Duisburg-Essen , Duisburg, Germany

    Ulrich Hoppe

  4. University of Saskatchewan , Saskatoon, Saskatchewan, Canada

    Julita Vassileva

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Álvarez Márquez, J.O., Ziegler, J. (2016). Hootle+: A Group Recommender System Supporting Preference Negotiation. In: Yuizono, T., Ogata, H., Hoppe, U., Vassileva, J. (eds) Collaboration and Technology. CRIWG 2016. Lecture Notes in Computer Science(), vol 9848. Springer, Cham. https://doi.org/10.1007/978-3-319-44799-5_12

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  • DOI: https://doi.org/10.1007/978-3-319-44799-5_12

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-44798-8

  • Online ISBN: 978-3-319-44799-5

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