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<Paper uid="H93-1066">
  <Title>A SPEECH-FIRST MODEL FOR REPAIR DETECTION AND CORRECTION</Title>
  <Section position="10" start_page="333" end_page="333" type="concl">
    <SectionTitle>
5. DISCUSSION
</SectionTitle>
    <Paragraph position="0"> In this paper, we propose a &amp;quot;speech-first&amp;quot; model, the Repair Interval Model, for studying repairs in spontaneous speech.</Paragraph>
    <Paragraph position="1"> This model divides the repair event into a reparandum interval, a di.sfluency interval, and a repair interval. We present empirical results from acoustic-phonetic and prosodic analysis of a corpus of spontaneous speech. In this study, we found that most reparanda offsets ended in word fragments, usually of (intended) content words, and that these fragments tended to be quite short and to exhibit particular acoustic-phonetic characteristics. We found that the disfluency interval could be distinguished from intonational phrase boundaries in fluent speech in terms of duration of pause, and that fragment and nonfragment repairs could also be distinguished from one another in terms of the duration of the disfluency interval.</Paragraph>
    <Paragraph position="2"> For our corpus, repair onsets could be distinguished from reparandum offsets by small but reliable differences in f0 and amplitude, and repair intervals differed from fluent speech in their characteristic prosodic phrasing. We are currently analyzing a larger sample of the ATIS corpus to test our initial results and to evaluate other possible predictors of repair phenomena.</Paragraph>
  </Section>
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