CHI '89 INTERACTIVE POSTER SESSION PAPERS AND ABSTRACT S The interactive poster sessions at the annual CHI conferences are one of the outlets that CHI provides for researchers t o present work that, for a variety of reasons, does not fit the constraints of the technical paper sessions . The poster format offers presenters a forum in which to meet and discuss their work with others interested in the same topic . It is particularly suited for work in the formative stages and for descriptions of systems with novel interface features, but a wide variety of research results have been presented in this format . Presenters find the opportunity to interact with their audience to be a very useful and rewarding aspect of the session . They invariably come away with a list of conference attendees interested in closely related topics . This year the poster arrangements were somewhat different from previous CH/s, in keeping with the many innovative aspect s of this "wild and woolly Texas" CHI . Forty-seven poster presentations were scattered among four of the lobby levels of the University of Texas Performing Arts Center, where the conference plenary sessions were held . Conference attendees got to view the posters and interact with the presenters before the opening plenary on Monday night, May 1, during the Mexican Fiesta later than evening, and during the Western Barbecue after the Tuesday plenaries . Traffic in the poster area wa s particularly heavy during the initial showing, but presenters and attendees had opportunities for more extended interaction s during the two receptions . The posters were grouped into nine topic areas : analysis/evaluation, analytic models, design of user interfaces, empirica l studies of programmers, information retrieval, I/O technologies, learning social impacts of computers, and user interfac e tools . Presenters came from Canada, England, Germany, and Japan, as well as the United States . Slightly more than half of the posters (25) came from universities, with seven of those being participants in the doctoral consortium which was held i n conjunction with the conference . Abstracts submitted for the poster session were reviewed by a panel of judges which included : James Alexander, US West; Nathaniel Borenstein, CMU; Wayne Gray, NYNEX; John Karat, IBM ; Jean McKendree, MCC; and Robert Vallone, Ashton Tat e Abstracts and papers printed here represent the second of two installments . The first appeared in the July 1989 SIGCH I Bulletin . Robin Jeffries CHI '89 Interactive Poster Sessions Chai r Getting There When You Don't Know Where `There' Is : Navigational Strategies in a Hypertext Help Syste m F. R . Campagnoni and Kate Ehrlich , Sun Microsystems Inc Expected and Unexpected Effects of Computer Medi a on Group Decision Makin g Vitaly Dubrovsky, Clarkson University, Sara Kiesler , Carnegie Mellon University and Beheruz N . Sethna, Clarkson University Comprehension of Pascal Statements by Novice an d Expert Programmers Jennifer L . Dyck and Brent Auernheimer, Californi a State University Iconer: A Tool for Evaluating Icon s Hendrika Alice Eisen, Carleton University Computerized Performance Monitoring and Performance Appraisa l Deborah B . Fenner, E Javier Lerch and Carol T. Kulik, Carnegie Mellon University The Development of a Task-Oriented, Minimal Conten t User's Manual Richard Gong, The University of Michigan Object Identification by Language in a User Interface Using Language and Image Information Akira Hakata, Tomoichi Takahashi and Yukio Kobayashi , ATR Communication Systems Research Laboratories . . . . Fragility in Expertise : A Study in Reactive Schedulin g Brian R . Huguenard, Michaerl J. Prietula, F. Javier Lerch , Carnegie Mellon University SIGCHI Bulletin January 1990 Usability Issues Related to Mapping a Command Languag e onto Interactive Software Panel s Barbara S . Isa and Deborah A . Krysiak, International Business Machines Corporation 40 UNIXTUTOR : A Menu-Based Transitional Interfac e Wesley Jamison and C . Michael Lewis , University of Pittsburgh 41 Using Electronic Mail : Themes Across Three User Interface Paradigm s Sandy Jones, Geoffrey Bock and Alana Brassard , Digital Equipment Corporation 45 Computer-Mediated Group Processes in Distribute d Command and Contro l J . M . Linville and R . W. Obermayer, VRC Corporation , J . J . Fallesen, U .S. Army Research Institute for th e Behavioral and Social Sciences 48 IDEA : From Advising to Collaboration James R . Miller, William C . Hill, Jean McKendree, Timothy P. McCandless and Loren Terveen , MCC Human Interface Laboratory 53 TANGO : A Framework and System for Algorith m Animatio n John T. Stasko, Georgia Institute of Technology 59 Designing Collaborative User Interfaces: Lessons Fro m Writer/Graphic Designer Interactio n Wendie Wulff, Carnegie Mellon University an d FitchRichardsonSmith 60 Volume 21, Number 3

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