A novel collaborative filtering approach for recommending ranked items

Yen Liang Chen, Li Chen Cheng

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

In recent years, Collaborative Filtering (CF) has proven to be one of the most successful techniques used in recommendation systems. Since current CF systems estimate the ratings of not-yet-rated items based on other items' ratings, these CF systems fail to recommend products when users' preferences are not expressed in numbers. In many practical situations, however, users' preferences are represented by ranked lists rather than numbers, such as lists of movies ranked according to users' preferences. Therefore, this study proposes a novel collaborative filtering methodology for product recommendation when the preference of each user is expressed by multiple ranked lists of items. Accordingly, a four-staged methodology is developed to predict the rankings of not-yet-ranked items for the active user. Finally, a series of experiments is performed, and the results indicate that the proposed methodology produces high-quality recommendations.

Original languageEnglish
Pages (from-to)2396-2405
Number of pages10
JournalExpert Systems with Applications
Volume34
Issue number4
DOIs
StatePublished - May 2008

Keywords

  • Collaborative filtering
  • Ranking list
  • Recommender system

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