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<Paper uid="C00-2107">
  <Title>Realizing Expressions of Doubt in Collaborative Dialogue *</Title>
  <Section position="5" start_page="743" end_page="743" type="concl">
    <SectionTitle>
5 Conclusion and Future work
</SectionTitle>
    <Paragraph position="0"> This pape.r has 1)resented rules that could be used by a natural language system to realize exl)ressions of doubt. We have identified sew;ral forms that are used to express doubt ill naturally occurring dialogues. Our rules correlate these forms to 1)eliet~ of the doul)ting agent, takiug into consideration the l)eliefs that must be conveyed tbr the utterance to be a successflll exl)ression of doubt.</Paragraph>
    <Paragraph position="1"> Preliininary evaluation shows that the belief feature values in our rules correspond to hmnan sul&gt; jects' intuitions about tile strength of tile doubt. In addition, the beliefs that would generate each t:onn are consistent with the belief~ that the subjects attrilmte to tile doubting agent when that form was used.</Paragraph>
    <Paragraph position="2"> Future work will e(meentrate on refining the features and exploring more explicit reasoning about tile beliefs of the other agent. We also plan to explore the role of intonation in realizing expressions of doubt.</Paragraph>
  </Section>
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