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<Paper uid="P98-1052">
  <Title>An Empirical Investigation of Proposals in Collaborative Dialogues</Title>
  <Section position="2" start_page="0" end_page="0" type="intro">
    <SectionTitle>
1 Introduction
</SectionTitle>
    <Paragraph position="0"> Our project's long-range goal (see http://www.isp.</Paragraph>
    <Paragraph position="1"> pitt.edu/'intgen/) is to create a unified architecture for collaborative discourse, accommodating both interpretation and generation. Our computational approach (Thomason and Hobbs, 1997) uses a form of weighted abduction as the reasoning mechanism (Hobbs et al., 1993) and modal operators to model context. In this paper, we describe the corpus study portion of our project, which is an integral part of our investigation into recognizing how conversational participants coordinate agreement. From our first annotation trials, we found that the recognition of &amp;quot;classical&amp;quot; speech acts (Austin, 1962; Searle, 1975) by coders is fairly reliable, while recognizing contextual relationships (e.g., whether an utterance accepts a proposal) is not as reliable. Thus, we explore other features that can help us recognize how participants coordinate agreement.</Paragraph>
    <Paragraph position="2"> Our corpus study also provides a preliminary assessment of the Discourse Resource Initiative (DR/) tagging scheme. The DRI is an international &amp;quot;grassroots&amp;quot; effort that seeks to share corpora that have been tagged with the core features of interest to the discourse community. In order to use the core scheme, it is anticipated that each group will need to refine it for their particular purposes. A usable draft core scheme is now available for experimentation (see  http://www.georgetown.edu/luperfoy/Discourse-Treebank/dri-home.html). Whereas several groups are working with the unadapted core DR/ scheme (Core and Allen, 1997; Poesio and Traum, 1997), we have attempted to adapt it to our corpus and particular research questions.</Paragraph>
    <Paragraph position="3"> First we describe our corpus, and the issue of tracking agreement. Next we describe our coding scheme and our intercoder reliability outcomes. Last we report our findings .on tracking agreement.</Paragraph>
  </Section>
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