Collaborative Filtering: Fallacies and Insights in Measuring Similarity

  • Symeonidis P
  • Nanopoulos A
  • Papadopoulos A
 et al. 
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Abstract

Nearest-neighbor collaborative filtering (CF) algorithms are gaining widespread acceptance in recommender systems and e-commerce applications. These algorithms provide recommendations for products, based on suggestions of users with similar preferences. One of the most crucial factors in the eectiveness of nearest-neighbor CF algorithms is the similarity measure that is used. The most popular measures are the Pearson correlation and cosine similarity. In this paper, we identify existing ...

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Authors

  • Panagiotis Symeonidis

  • Alexandros Nanopoulos

  • Apostolos N A.N. Papadopoulos

  • Y. Manolopoulos

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