2nd International Conference on Trust Management (iTrust 2004)
March 29-31, 2004, Oxford, UK.

Analyzing Correlation Between Trust and User Similarity in Online Communities

Cai-Nicolas Ziegler, Georg Lausen

Abstract:

Past evidence has shown that generic approaches to recommender systems based upon collaborative filtering tend to poorly scale. Moreover, their fitness for scenarios supposing distributed data storage and decentralized control, like the Semantic Web, becomes largely limited for various reasons. We believe that computational trust models bear several favorable properties for social filtering, opening new opportunities by either replacing or supplementing current techniques. However, in order to provide meaningful results for recommender system applications, we expect notions of trust to clearly reflect user similarity. In this work, we therefore provide empirical results obtained from one real, operational community and verify latter hypothesis for the domain of book recommendations.

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