PCFGs with syntactic and prosodic indicators of speech repairs

TitlePCFGs with syntactic and prosodic indicators of speech repairs
Publication TypeConference Papers
Year of Publication2006
AuthorsHale J, Shafran I, Yung L, Dorr BJ, Harper M, Krasnyanskaya A, Lease M, Liu Y, Roark B, Snover M, Stewart R
Conference NameProceedings of the 21st International Conference on Computational Linguistics and the 44th annual meeting of the Association for Computational Linguistics
Date Published2006///
PublisherAssociation for Computational Linguistics
Conference LocationStroudsburg, PA, USA

A grammatical method of combining two kinds of speech repair cues is presented. One cue, prosodic disjuncture, is detected by a decision tree-based ensemble classifier that uses acoustic cues to identify where normal prosody seems to be interrupted (Lickley, 1996). The other cue, syntactic parallelism, codifies the expectation that repairs continue a syntactic category that was left unfinished in the reparandum (Levelt, 1983). The two cues are combined in a Treebank PCFG whose states are split using a few simple tree transformations. Parsing performance on the Switchboard and Fisher corpora suggests that these two cues help to locate speech repairs in a synergistic way.