UMBC ebiquity

On Modeling Trust in Social Media using Link Polarity

Authors: Anubhav Kale, Pranam Kolari, Akshay Java, Tim Finin, and Anupam Joshi

Date: May 14, 2007

Abstract: There is a growing interest in exploring the role of social networks to understand how communities and individuals spread influence. In a densely connected online world, social media and networks have a great potential in influencing our thoughts and actions. We describe techniques to model trust in social media and present experimental results on finding “like minded” blogs based on blog-to-blog link sentiment for a particular domain. Using simple sentiment detection techniques, we identify the polarity (positive, negative or neutral) of the text surrounding links that point from one blog post to another. We use a trust propagation model to spread this sentiment from a subset of connected blogs to other blogs and deduce like-minded blogs in the blog graph. We then extend the same technique to label main stream news sources as left- or right-leaning based on the links between blogs and news sources. Our results confirm that the simple heuristics to analyze the text surrounding links and our trust propagation model are highly applicable for domains having weak link structure. These techniques demonstrate the potential of using polar links for more generic problems such as detecting trustworthy nodes in web graphs.

Type: TechReport

Address: Baltimore MD 21250

Organization: Ebiquity Research Laboratory, Department of COmputer Science and Electrical Engineering

Institution: University of Maryland, Baltimore County

Number: EB06

Tags: social media, blog, blog, sentiment detection, opinion extraction, trust

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