Dennis E. Egan
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Publications by Dennis E. Egan (bibliography)
» 1993 «
Glushko, Bob, Dougherty, Dale, Egan, Dennis E., Kimber, Eliot, Martin, Peter, Mylonas, Elli and Warren, Bruce (1993): The Business of Hypertext. In: Stotts, P. David and Furuta, Richard (eds.) Proceedings of ACM Hypertext 93 Conference November 14-18, 1993, Seattle, Washington. .
“An expert and diverse panel, drawn from business and academe, and from large corporations and entrepreneurial small businesses, discusses the business and management of serious hypertext projects. Topics include the transition from research to practice, the role of standards, identifying markets and customers, and organizations and mechanisms that ensure editorial quality, successful deployment, and commercial viability.”
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» 1991 «
Egan, Dennis E., Lesk, Michael E., Ketchum, R. Daniel, Lochbaum, Carol C., Remde, Joel R., Littman, Michael and Landauer, Thomas K. (1991): Hypertext for the Electronic Library? CORE Sample Results. In: Walker, Jan (ed.) Proceedings of ACM Hypertext 91 Conference December 15-18, 1991, San Antonio, Texas. pp. 299-312. Available online
“The Chemistry Online Retrieval Experiment, or CORE project, is studying the possibility of creating a useful, usable electronic library for chemistry researchers. In a preliminary study, chemists were observed performing five different tasks representative of typical uses of the scientific journal literature. The tasks simulated browsing journals, answering specific questions given a citation to an article, answering specific questions given no citation, writing essays to summarize and integrate information, and finding "analogous transformations" for chemical reactions. Chemists carried out these tasks using one of three systems: (a) the printed journals supplemented with a widely used printed index system, (b) a hypertext system (the SuperBook document browser), or (c) a new electronic system (Pixlook) that incorporates traditional document retrieval methods plus full text indexing and delivers bitmap images of journal pages. Both electronic systems had a large advantage over the printed system for search and essay tasks. SuperBook users were faster and more accurate than Pixlook users at finding information relevant to browsing and search topics. Certain SuperBook hypertext features, however, did not work as well as Pixlook for displaying target articles. The patterns of data and log files of subjects suggest how SuperBook, Pixlook and related systems might be improved.”
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Egan, Dennis E. (1991): Abstracts of CHI'91 Interactive Posters and Short Talks. In ACM SIGCHI Bulletin, 23 (4) p. 33
» 1990 «
Perlman, Gary, Egan, Dennis E., Ehrlich, Kate, Marchionini, Gary, Nielsen, Jakob and Shneiderman, Ben (1990): Evaluating Hypermedia Systems. In: Carrasco, Jane and Whiteside, John (eds.) Proceedings of the ACM CHI 90 Human Factors in Computing Systems Conference 1990, Seattle, Washington,USA. pp. 387-390. Available online
“Hypermedia systems provide online access to complex networks of information with the goal of making it easier to find and use information. To validate the utility of their systems, several researchers and system developers have attempted to collect evaluation data on the usability and effectiveness of their systems and the features in their systems. Because of the potential complexity of hypermedia systems and the information structures they may represent, a variety of evaluation measures and methods have been used. These trade off the need for timely feedback in the development of new technology, the difficulty of controlling one or two variables in systems with dozens or hundreds of components, and the goal of gaining an understanding of hypermedia systems. The key issues discussed by the panel include: Ecological Evaluation of New Technologies Embedded in Complex Systems: How can the utility of new technologies be evaluated validly when they must be embedded in complex software systems that include a hardware platform, underlying user interface, and a myriad of functions? Are controlled experiments necessary and can they be performed economically? What problems can occur in naturalistic settings? Measures of Learnability, Usability and Effectiveness: What performance measures are most useful? How does the choice of measure depend on the maturity of a system? on the tasks to be done with a system? Application to Human-Computer System Evaluation in General: What have been some results about hypermedia systems as a result of empirical evaluation? How does the evaluation of hypermedia systems apply to the evaluation of general systems? What guidance can be given to designers and users of hypermedia systems?”
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» 1989 «
Egan, Dennis E., Remde, Joel R., Landauer, Thomas K., Lochbaum, Carol C. and Gomez, Louis M. (1989): Behavioral Evaluation and Analysis of a Hypertext Browser. In: Bice, Ken and Lewis, Clayton H. (eds.) Proceedings of the ACM CHI 89 Human Factors in Computing Systems Conference April 30 - June 4, 1989, Austin, Texas. pp. 205-210.
“Students performed a variety of tasks using a statistics text presented either in conventional printed form or via the text browser "SuperBook" (Remde, Gomez and Landauer [18]). Students using SuperBook answered more search questions correctly, wrote higher quality "open-book" essays, and recalled certain incidental information better than students using the conventional text. Subjective ratings overwhelmingly favored SuperBook. The advantage of SuperBook appears to be particularly strong for questions that are not anticipated by the author's organization of a text.”
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Baird, Pat, Egan, Dennis E., Kintsch, Walter, Smith, John and Streitz, Norbert A. (1989): Cognitive Aspects of Designing Hypertext Systems. In: Halasz, Frank and Meyrowitz, Norman (eds.) Proceedings of ACM Hypertext 89 Conference November 5-8, 1989, Pittsburgh, Pennsylvania. p. 397.
Egan, Dennis E., Remde, Joel R., Gomez, Louis M., Landauer, Thomas K., Eberhardt, Jennifer and Lochbaum, Carol C. (1989): Formative Design-Evaluation of SuperBook. In ACM Transactions on Information Systems, 7 (1) pp. 30-57
“SuperBook is a hypertext browsing system designed to improve the usability of conventional documents. Successive versions of SuperBook were evaluated in a series of behavioral studies. Students searched for information in a statistics text presented either in conventional printed form or in SuperBook form. The best version of SuperBook enabled students to answer search questions more quickly and accurately than they could with the conventional text. Students wrote higher quality "open-book" essays using SuperBook than they did with the conventional text, and their subjective ratings of the documentation strongly favored SuperBook. This work is a case study of formative design-evaluation. Behavioral evaluation of the first version of SuperBook showed how design factors and user strategies affected search and established baseline performance measures with printed text. The second version of SuperBook was implemented with the goal of improving search accuracy and speed. User strategies that had proved effective in the first study were made very easy and attractive to use. System response time for common operations was greatly improved. Behavioral evaluation of the new SuperBook demonstrated its superiority to printed text and suggested additional improvements that were incorporated into "MiteyBook," a SuperBook implementation for PC-size screens. Search with MiteyBook proved to be approximately 25 percent faster and 25 percent more accurate than that obtained with a conventional printed book.”
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» 1988 «
Egan, Dennis E., Gomez, Louis M., McKeown, Kathleen R., Soloway, Elliot, Reiser, Brian J. and Marshall, Catherine C. (1988): Dealing with Diversity: Approaches to Individual Differences in Human-Computer Interaction. In: Soloway, Elliot, Frye, Douglas and Sheppard, Sylvia B. (eds.) Proceedings of the ACM CHI 88 Human Factors in Computing Systems Conference June 15-19, 1988, Washington, DC, USA. pp. 79-81.
“Developers and behavioral scientists concerned with human-computer interaction need to learn more about problems caused by user differences, and prospects for dealing with diverse user populations. This panel is intended to heighten the awareness of CHI'88 conferees to recent research documenting user differences, experimental approaches to user-sensitive interface design, and the implications of user differences for system developers.”
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» 1986 «
Nakatani, Lloyd H., Egan, Dennis E., Ruedisueli, Laurence W., Hawley, Patrick M. and Lewart, Deborah K. (1986): TNT: A Talking Tutor 'N' Trainer for Teaching the Use of Interactive Computer Systems. In: Mantei, Marilyn and Orbeton, Peter (eds.) Proceedings of the ACM CHI 86 Human Factors in Computing Systems Conference April 13-17, 1986, Boston, Massachusetts. pp. 29-34.
“Tutor 'N' Trainer (TNT) is an automated tutor for vi, the UNIX system screen editor. TNT fosters learning by doing. The Tutor component guides the student's practice with spoken instruction and feedback. The Trainer component assures safety during practice by permitting only previously taught and appropriate operations. Individualization and effectiveness are achieved in two ways: special helper keys enable slow learners to get extra help and repeat troublesome tasks; and practice loops force slow learners to practice repeatedly until competency is achieved.”
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Gomez, Louis M., Egan, Dennis E. and Bowers, Cheryll (1986): Learning to Use a Text Editor: Some Learner Characteristics That Predict Success. In Human-Computer Interaction, 2 (1) pp. 1-23
“Why do some people have much more difficulty than others in learning a computer-based skill? To answer this question, we observed first-time users of computers as they learned to use a computer text editor. In two experiments, older people had more trouble than younger people and those who scored low on a standard test of spatial memory had greater difficulty than high scorers. These correlations were stable over several hours of practice and did not vary as a function of the type of terminal used or specific editing problems attempted. Correlations involving age and spatial memory could not be explained by other characteristics such as amount of education, reasoning ability, or associative memory ability. Results like these that relate learning difficulty to specific characteristics of people ultimately may suggest ways to change computer interface design or training to accommodate a wider range of users.”
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» 1983 «
Gomez, Louis M., Egan, Dennis E., Wheeler, Evangeline A., Sharma, Dhiraj K. and Gruchacz, Aleta M. (1983): How Interface Design Determines Who Has Difficulty Learning To Use a Text Editor. In: Smith, Raoul N., Pew, Richard W. and Janda, Ann (eds.) Proceedings of the ACM CHI 83 Human Factors in Computing Systems Conferenc December 12-15, 1983, Boston, Massachusetts, United States. pp. 176-181.
“In previous studies two background characteristics of computer novices were consistently correlated with their success in learning to use a line-based computer text editor. Older people and those who scored low on a standard test of Spatial Memory had more difficulty than younger people and those with higher Spatial Memory test scores. In the present study, we observed computer novices as they learned to use a screen-based editor, which presumably reduced spatial memory load. Contrary to expectations, performance using a screen-based editor was again strongly correlated with Spatial Memory test scores. However, the correlation between performance and subjects' age was significantly reduced. Overall, subjects were able to perform the same text editing exercises almost twice as fast using the screen editor compared to subjects in previous experiments using the line editor. These results are discussed in terms of the different cognitive demands placed on users by line and screen text editors.”
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» 1982 «
Egan, Dennis E., Bowers, Cheryll and Gomez, Louis M. (1982): Learner Characteristics that Predict Success in Using a Text-Editor Tutorial. In: Nichols, Jean A. and Schneider, Michael L. (eds.) Proceedings of the SIGCHI conference on Human factors in computing systems March 15-17, 1982, Gaithersburg, Maryland, United States. pp. 337-340.
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Mar 20th, 2010
Changes to this page (author)
13 Feb 2010: Enabled abstracts to be shown on Dennis E. Egan's author page.23 Jun 2007: Author was edited 28 Apr 2003: Added the author to the bibliography
