Enhance User-Level Sentiment Analysis on Microblogs with Approval Relations

  • Federico Alberto Pozzi
  • Daniele Maccagnola
  • Elisabetta Fersini
  • Enza Messina
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8249)


Sentiment Analysis for polarity classification on microblogs is generally based on the assumption that texts are independent and identically distributed (i.i.d). Although these methods are aimed at handling the complex characteristics of natural language, usually they do not consider microblogs as networked data. Early approaches for overcoming this limitation consist in exploiting friendship relationships, since connected users may be more likely to hold similar opinions (Homophily and Social Influence). However, the assumption about the friendship relations does not reflect the real world, where two connected users could have different opinions about the same topic. In order to overcome these shortcomings, we propose a semi-supervised framework that estimates user polarities about a given topic by combining post contents and weighted approval relations, which are intended to better represent the contagion on social networks. The experimental investigation reveals that incorporating approval relations can lead to statistically significant improvements over the performance of complex supervised classifiers based only on textual features.


Sentiment Analysis Conditional Random Field Bayesian Model Average Bayesian Model Average Black Node 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer International Publishing Switzerland 2013

Authors and Affiliations

  • Federico Alberto Pozzi
    • 1
  • Daniele Maccagnola
    • 1
  • Elisabetta Fersini
    • 1
  • Enza Messina
    • 1
  1. 1.University of Milano-BicoccaMilanItaly

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