Supporting People in Finding Information: Hybrid Recommender Systems and Goal-Based Structuring

Mark van Setten

Abstract

The Internet has provided people with the possibility to easily publish and search for information. This resulted in an enormous amount of online available information, products and services that made it a challenge for people to find what is really interesting to them. This thesis addresses three solutions that can be used to support people in finding interesting items, based on the three main processes of a personalized information system: selecting, structuring and presenting information. For the selection of information, a framework is described for the development of hybrid recommender systems that switches between prediction techniques based on the most up-to-date knowledge about the user, other users, the item and other items. Experiments with the framework show that this increases the accuracy of interest predictions. To structure information, a method is investigated that makes it easier for people to find interesting information by structuring items according to the possible goals people have. Experiments with this goal-based structuring method show that goal-based structuring supports people in finding interesting information even more than recommendations. However, it takes people time to get used to goal-based structuring. Finally, it addresses those user interface aspects that are specific to recommender systems, namely presenting predictions, presenting explanations and providing feedback. A user-centered design approach shows that people prefer traditional ways of presenting predictions, that they believe explanations about predictions are important and that they prefer to not give explicit feedback but have a system derive their interests implicitly. However, if explicit feedback is required, it should be acquired in a manner similar to how predictions are presented.
Original languageEnglish
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • Nijholt, Antinus , Supervisor
  • Veenstra, M.J.A., Advisor
  • Advisor
  • Nijholt, A., Supervisor
  • van Dijk, E.M.A.G., Supervisor
Date of Award1 Dec 2005
Place of PublicationEnschede
Publisher
Print ISBNs90-75176-89-9
StatePublished - Dec 2005

Fingerprint

Recommender systems
Feedback
Experiments
User interfaces
Information systems
Switches
Internet
User centered design

Keywords

  • METIS-228251
  • EWI-9166
  • HMI-HF: Human Factors
  • HMI-IE: Information Engineering
  • IR-50889

Cite this

van Setten, Mark. / Supporting People in Finding Information: Hybrid Recommender Systems and Goal-Based Structuring. Enschede : Telematica Instituut, 2005. 244 p.
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Supporting People in Finding Information: Hybrid Recommender Systems and Goal-Based Structuring. / van Setten, Mark.

Enschede : Telematica Instituut, 2005. 244 p.

Research output: ScientificPhD Thesis - Research external, graduation UT

TY - THES

T1 - Supporting People in Finding Information: Hybrid Recommender Systems and Goal-Based Structuring

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PY - 2005/12

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AB - The Internet has provided people with the possibility to easily publish and search for information. This resulted in an enormous amount of online available information, products and services that made it a challenge for people to find what is really interesting to them. This thesis addresses three solutions that can be used to support people in finding interesting items, based on the three main processes of a personalized information system: selecting, structuring and presenting information. For the selection of information, a framework is described for the development of hybrid recommender systems that switches between prediction techniques based on the most up-to-date knowledge about the user, other users, the item and other items. Experiments with the framework show that this increases the accuracy of interest predictions. To structure information, a method is investigated that makes it easier for people to find interesting information by structuring items according to the possible goals people have. Experiments with this goal-based structuring method show that goal-based structuring supports people in finding interesting information even more than recommendations. However, it takes people time to get used to goal-based structuring. Finally, it addresses those user interface aspects that are specific to recommender systems, namely presenting predictions, presenting explanations and providing feedback. A user-centered design approach shows that people prefer traditional ways of presenting predictions, that they believe explanations about predictions are important and that they prefer to not give explicit feedback but have a system derive their interests implicitly. However, if explicit feedback is required, it should be acquired in a manner similar to how predictions are presented.

KW - METIS-228251

KW - EWI-9166

KW - HMI-HF: Human Factors

KW - HMI-IE: Information Engineering

KW - IR-50889

M3 - PhD Thesis - Research external, graduation UT

SN - 90-75176-89-9

PB - Telematica Instituut

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