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Evaluation in Discourse: a Corpus-Based Study

Benamara Zitoune, Farah and Asher, Nicholas and Mathieu, Yvette Yannick and Popescu, Vladimir and Chardon, Baptiste Evaluation in Discourse: a Corpus-Based Study. (2016) Dialogue and Discourse, 7 (1). 1-49. ISSN 2152-9620

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Official URL: http://dad.uni-bielefeld.de/index.php/dad/article/view/3665

Abstract

This paper describes the CASOAR corpus, the first manually annotated corpus that explores the impact of discourse structure on sentiment analysis with a study of movie reviews in French and in English as well as letters to the editor in French. While annotating opinions at the expression, the sentence or the document level is a well-established task and relatively straightforward, discourse annotation remains diffcult, especially for non experts. Therefore, combining both annotations poses several methodological problems that we address here. We propose a multi-layered annotation scheme that includes: the complete discourse structure according to the Segmented Discourse Representation Theory, the opinion orientation of elementary discourse units and opinion expressions, and their associated features. We detail each layer, explore the interactions between them and discuss our results. In particular, we examine the correlation between discourse and semantic category of opinion expressions, the impact of discourse relations on both subjectivity and polarity analysis and the impact of discourse on the determination of the overall opinion of a document. Our results demonstrate that discourse is an important cue for sentiment analysis, at least for the corpus genres we have studied.

Item Type:Article
HAL Id:hal-02354387
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université de Paris Diderot - Paris 7 (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > Synapse Développement (FRANCE)
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Deposited By: IRIT IRIT
Deposited On:07 Nov 2019 10:04

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