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. Author manuscript; available in PMC: 2019 Aug 1.

Published in final edited form as: Int J Speech Lang Pathol. 2017 Mar 17;20(4):406–421. doi: 10.1080/17549507.2017.1293158

Example of the Rhetorical Structure Theory (RST) analysis in Cantonese transcripts of (a) a control participant (PAR) in the story-telling task of the refused umbrella story and (b) a participant (PAR) with aphasia in the procedural description task of making an egg and ham sandwich. Each numbered utterance represents an Elementary Discourse Unit (EDU), which is the smallest semantic entity with specific syntactic and phonological criteria. A text is first segmented into EDUs. The hierarchical and connected structure among EDUs in a text is then formed.

Example of the Rhetorical Structure Theory (RST) analysis in Cantonese transcripts of (a) a control participant (PAR) in the story-telling task of the refused umbrella story and (b) a participant (PAR) with aphasia in the procedural description task of making an egg and ham sandwich. Each numbered utterance represents an Elementary Discourse Unit (EDU), which is the smallest semantic entity with specific syntactic and phonological criteria. A text is first segmented into EDUs. The hierarchical and connected structure among EDUs in a text is then formed.