Automatic Extraction of Polar Adjectives for the Creation of Polarity Lexicons

  • Authors
  • Vázquez, Silvia; Padró, Muntsa; Bel, Núria; Gonzalo, Julio
  • UPF authors
  • BEL RAFECAS, NÚRIA;
  • Authors of the book
  • Varios Autores
  • Book title
  • Proceedings of COLING 2012: 24th International Conference on Computational Linguistics COLING 2012
  • Publication year
  • 2012
  • Pages
  • 1271-1280
  • Abstract
  • Automatic creation of polarity lexicons is a crucial issue to be solved in order to reduce time and/nefforts in the first steps of Sentiment Analysis. In this paper we present a methodology based on/nlinguistic cues that allows us to automatically discover, extract and label subjective adjectives/nthat should be collected in a domain-based polarity lexicon. For this purpose, we designed a/nbootstrapping algorithm that, from a small set of seed polar adjectives, is capable to iteratively/nidentify, extract and annotate positive and negative adjectives. Additionally, the method/nautomatically creates lists of highly subjective elements that change their prior polarity even/nwithin the same domain. The algorithm proposed reached a precision of 97.5% for positive/nadjectives and 71.4% for negative ones in the semantic orientation identification task.
  • Complete citation
  • Vázquez, Silvia; Padró, Muntsa; Bel, Núria; Gonzalo, Julio. Automatic Extraction of Polar Adjectives for the Creation of Polarity Lexicons. In: Varios Autores. Proceedings of COLING 2012: 24th International Conference on Computational Linguistics COLING 2012. 1 ed. Mumbai: 2012. p. 1271-1280.