Most of the recent literature on Sentiment Analysis over Twitter is tied to the idea that the sentiment is a function of an incoming tweet. However, tweets are filtered through streams of posts, so that a wider context, e.g. A topic, is always available. In this work, the contribution of this contextual information is investigated. We modeled the polarity detection problem as a sequential classification task over streams of tweets. A Markovian formulation of the Support Vector Machine discriminative model as embodied by the SVMhmm algorithm has been here employed to assign the sentiment polarity to entire sequences. The experimental evaluation proves that sequential tagging effectively embodies evidence about the contexts and is able to reach a relative increment in detection accuracy of around 20% in F1 measure. These results are particularly interesting as the approach is flexible and does not require manually coded resources.

Vanzo, A., Croce, D., Basili, R. (2014). A context-based model for sentiment analysis in twitter. In COLING 2014 - 25th International Conference on Computational Linguistics, Proceedings of COLING 2014: Technical Papers (pp.2345-2354). Association for Computational Linguistics, ACL Anthology.

A context-based model for sentiment analysis in twitter

CROCE, DANILO;BASILI, ROBERTO
2014-01-01

Abstract

Most of the recent literature on Sentiment Analysis over Twitter is tied to the idea that the sentiment is a function of an incoming tweet. However, tweets are filtered through streams of posts, so that a wider context, e.g. A topic, is always available. In this work, the contribution of this contextual information is investigated. We modeled the polarity detection problem as a sequential classification task over streams of tweets. A Markovian formulation of the Support Vector Machine discriminative model as embodied by the SVMhmm algorithm has been here employed to assign the sentiment polarity to entire sequences. The experimental evaluation proves that sequential tagging effectively embodies evidence about the contexts and is able to reach a relative increment in detection accuracy of around 20% in F1 measure. These results are particularly interesting as the approach is flexible and does not require manually coded resources.
25th International Conference on Computational Linguistics, COLING 2014
Helix Conference Centre at Dublin City University (DCU), irl
2014
Baidu
Rilevanza internazionale
Settore ING-INF/05 - Sistemi di Elaborazione delle Informazioni
English
Language and Linguistics; Linguistics and Language
Intervento a convegno
Vanzo, A., Croce, D., Basili, R. (2014). A context-based model for sentiment analysis in twitter. In COLING 2014 - 25th International Conference on Computational Linguistics, Proceedings of COLING 2014: Technical Papers (pp.2345-2354). Association for Computational Linguistics, ACL Anthology.
Vanzo, A; Croce, D; Basili, R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/157917
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