| Summary: | This paper examines the linguistic realization of continuative and contrastive discourse relations (DRs) in English argumentative discourse, focusing on both discourse as product and discourse as process. Based on a corpus of 25 argumentative texts with corresponding experimental data stemming from an editing-based task, this study aims to answer the questions of (i) how continuative and contrastive DRs are linguistically realized (i.e., encoded in coherence strands or additionally signaled) in English argumentative discourse, and (ii) how their signaling unfolds during the real-time process of discourse editing. The quantitative analysis of the edited texts shows that contrastive DRs are signaled throughout (e.g., through contrastive discourse connectives), whereas continuative DRs are more frequently encoded only. In addition, the qualitative analysis of the experimental data (i.e., keystroke logging data and corresponding metadata) reveals that while the signaling of contrastive DRs is made manifest right from the start of the editing process across the data, continuative DRs tend to be signaled only at a later stage. This can be explained by the semantic overlap between different types of continuative DRs, which requires that the participants (re-)negotiate the exact nature (and thus the appropriate linguistic signal) of a particular continuative DR more frequently than contrastive DRs, which are clearly interpreted and thus readily signaled as contrastive throughout.
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