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http://hdl.handle.net/10071/19767
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Title: Reconhecimento de actos de diálogo hierárquicos e multi-etiqueta em dados em Espanhol
Authors: Ribeiro, E.
Ribeiro, R.
de Matos, D.
Keywords: Reconhecimento de actos de diálogo
Classificação hierárquica
Classificação multi-etiqueta
Issue Date: 2019
Publisher: Universidade do Minho; Universidade de Vigo
Abstract: Dialog acts reveal the intention behind the utte-red words. Thus, their automatic recognition is im-portant for a dialog system trying to understand itsconversational partner. The study presented in thisarticle approaches that task on the DIHANA corpus,whose three-level dialog act annotation scheme posesproblems which have not been explored in recent stu-dies. In addition to the hierarchical problem, the twolower levels pose multi-label classification problems.Furthermore, each level in the hierarchy refers to adifferent aspect concerning the intention of the spea-ker both in terms of the structure of the dialog and thetask. Also, since its dialogs are in Spanish, it allows usto assess whether the state-of-the-art approaches onEnglish data generalize to a different language. Morespecifically, we compare the performance of differentsegment representation approaches focusing on bothsequences and patterns of words and assess the impor-tance of the dialog history and the relations betweenthe multiple levels of the hierarchy. Concerning thesingle-label classification problem posed by the top le-vel, we show that the conclusions drawn on Englishdata also hold on Spanish data. Furthermore, weshow that the approaches can be adapted to multi-label scenarios. Finally, by hierarchically combiningthe best classifiers for each level, we achieve the bestresults reported for this corpus.
Peer reviewed: yes
URI: http://hdl.handle.net/10071/19767
DOI: 10.21814/lm.11.1.278
ISSN: 1647-0818
Ciência-IUL: https://ciencia.iscte-iul.pt/id/ci-pub-61027
Accession number: WOS:000476638500003
Appears in Collections:IT-RN - Artigo em revista nacional com arbitragem científica

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