Prosodic classification of discourse markers

• Autor(a) principal: Cabarrão, Vera
• Data de Publicação: 2016
• Outros Autores: Moniz, Helena, Jaime Ferreira, Fernando Batista, Isabel Trancoso, Ana Isabel Mata, Sérgio Curto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: https://doi.org/10.26334/2183-9077/rapln2ano2016a4
• topic: marcadores discursivos; prosódia; processamento de fala; classificação automática multiclasse; discourse markers; prosody; speech processing; multiclass automatic classification

This work describes the discourse markers present in two corpora for European Portuguese, in different domains (university lectures and map-task dialogues). In this study, we also perform a multiclass automatic classification task based on prosodic features to verify in both corpora which words are discourse markers, which are disfluencies, and which are sentence like-units (SUs). Results show that the selection of discourse markers varies across domain and between speakers. As for the classification task, results show that the discourse markers are better classified in the lectures corpus (87%) than in the dialogue corpus (84%). However, cross-domain experiments evidenced that data trained with the dialogue corpus predicts better the events in the lecture corpus, since this domain displays more speakers and therefore complex patterns. In both corpora, markers are more easily classified as SUs than as disfluencies.