Natural Language in Computer HumanInteraction A CHI 99 Special Interest Group, Nancy Green and David Novick Fifty-three people from across the world participated in the CHI 99 special interest group on Natural Language in Computer Human-Interaction. The SIG's main goal was to provide an opportunity for CHI99 attendees from two research communities, natural language processing (NLP) and human-computer interaction (CHI), to discuss issues of mutual interest. The SIG embraced natural-language interfaces of all kinds, including text, spoken and multi-modal interaction. This report includes the results of e-mail discussions following up on the SIG itself. The NL SIG's motivation was that the growing interest in human-computer interfaces that use spoken or written natural language in some way is leading researchers and practitioners who work on these interfaces to find that the two fields of research, CHI and NLP, are complementary and converging. In the CHI research community, there have been investigations on a number of related issues such as usability of text and graphics in on-line doCumentation, (e.g., Landauer et al.; Brockmann, 1986), hypertext, (e.g., Chen & Rada, 1996), spoken-dialogue interfaces, and (e.g., Yankelovich, Levow, & Marx, 1995; Hansen, Novick & Sutton, 1996; Walker et al., 1998), and language/audio
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