A Method of Computing Measure for Evaluating Conversational Coherency in E-mail Communication

In this paper, we de ne a measure for evaluating conversational coherency and propose a method of computing it. We de ne a deliberation stream in email communication and construct deliberation structure which the deliberation streams are introduced into. And we de ne discontinuity between utterances as the measure for evaluating conversational coherency by using the deliberation structure, con rm that the measure is useful. However, in order to compute the value of the measure, the contents of the email messages must be analyzed, and also deliberation streams must be extracted. So we propose a method of extracting deliberation streams from email messages without conversational analysis.