Vázquez, SilviaPadró, MuntsaBel Rafecas, NúriaGonzalo, Julio2013-02-262013-02-262012Vázquez S, Padró M, Bel N, Gonzalo J. Automatic Extraction of Polar Adjectives for the Creation of Polarity Lexicons. In: Kay M, Boitet C, editors. Proceedings of COLING 2012: Posters: 24th International Conference on Computational Linguistics COLING 2012; 2012 December 8-15; Mumbai, India. Mumbai: The COLING 2012 Organizing Committee; 2012. p. 1271-1280.http://hdl.handle.net/10230/20422Automatic 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.application/pdfeng© ACL, Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Licenseinfo:eu-repo/semantics/conferenceObjectSentiment AnalysisOpinion MiningPolarity LexiconSubjectivity Detectioninfo:eu-repo/semantics/openAccess