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A personalized credibility model for recommending messages in social participatory media environments

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Abstract

We propose a method to determine the credibility of messages that are posted in participatory media (such as blogs), of use in recommender systems designed to provide users with messages that are considered to be the most credible to them. Our approach draws from theories developed in sociology, political science, and information science—we show that the social context of users influences their opinion about the credibility of messages they read, and that this context can be captured by analyzing the social network of users. We use this insight to improve recommendation algorithms for messages created in participatory media environments. Our methodology rests on Bayesian learning, integrating new concepts of context and completeness of messages inspired by the strength of weak ties hypothesis from social network theory. We show that our credibility evaluation model can be used to significantly enhance the performance of collaborative filtering recommendation. Experimental validation is done using datasets obtained from social networking websites used for knowledge sharing. We conclude by clarifying our relationship to the semantic adaptive social web, emphasizing our use of personal evaluations of messages and the social network of users, instead of merely automated semantic interpretation of content.

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Authors and Affiliations

  1. Department of Computer Science and Engineering, Indian Institute of Technology Delhi, New Delhi, Delhi, 110016, India

    Aaditeshwar Seth

  2. School of Computer Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore

    Jie Zhang

  3. School of Computer Science, University of Waterloo, 200 University Ave. W, Waterloo, ON N2L 3G1, Canada

    Robin Cohen

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  1. Aaditeshwar Seth
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  2. Jie Zhang
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  3. Robin Cohen
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Correspondence to Jie Zhang.

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Seth, A., Zhang, J. & Cohen, R. A personalized credibility model for recommending messages in social participatory media environments. World Wide Web 18, 111–137 (2015). https://doi.org/10.1007/s11280-013-0244-2

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