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<Paper uid="C94-2182">
  <Title>COLLABORATION ON REFERENCE TO OBJECTS THAT ARE NOT MUTUALLY KNOWN</Title>
  <Section position="11" start_page="1120" end_page="1121" type="concl">
    <SectionTitle>
7 CONCLUSION
</SectionTitle>
    <Paragraph position="0"> When an agent refers to a particular object that is not previously known to another agent, she has tile intentiou that tile agent be able to identify the object (when it is possible to do so) by means of the referring exln'ession. Because of the inevitable differences in their beliefs about the world -specifically about what is salient--the agents may have to collaborate to make the expression adequate.</Paragraph>
    <Paragraph position="1"> 4Recall that she raisect her confidence thrcshoM as a result of the heater's postponement move, so now she must meet Ihe flew threshold.</Paragraph>
    <Paragraph position="2">  We have implemented a computational plan-based model that accounts for the collaborative nature of reference in the domain of interactive direction-giving. An agent constructs a referring expression plan by using the referent's most salient features. An agent understands a reference once he is confident in the adequacy of its (inferred) plan as a means of identifying the referent. To collaborate, the agents use judgment, suggestion, and elaboration moves to refashion the referring expression until they mutually believe that the recipient has understood.</Paragraph>
  </Section>
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