Discussion of users of information retrieval systems focuses on a machine-learning approach to inferring the user's context in the Okapi system. Results of an evaluation experiment are given, and it is concluded that context learning can help information retrieval systems adapt to users' particular queries. (Author/LRW)

Proposes a three-level framework for classifying elearning (electronic learning) interactions in distance education. Illustrates how the framework may be used to design and sequence electronic learning interactions, analyze planned interactions to reduce the need for costly revisions, and organize research to help interpret findings and guide…

Knowledge-based expert systems used as job aids or job coaches can cut the amount of training time significantly and reduce training costs. (SK)

Describes a project that developed two expert systems for library cataloging using the second edition of the Anglo American Cataloging Rules (AACR2) as a knowledge base. The discussion covers cataloging as interpretation, the structure of AACR2, and the feasibility of using expert systems for cataloging in traditional library settings. (26…

This reprint from "Designing the User Interface: Strategies for Effective Human-Computer Interaction" (Shneiderman) discusses the impact of computers on individuals and society. Highlights include individual opportunities for learning, entertainment, and cooperation through networking; problems with the use of computer systems; and the…

Discusses how to design effective user interfaces for computer-based training (CBT) programs. Four types of interfaces are described: presentation, including consistency; conversation, including feedback and flexibility; navigation; and explanation, including online help. A job aid for evaluating CBT interfaces is included. (Contains 13…

Virtual reality, a three-dimensional simulation technology, may best be used (1) when training mistakes would be costly; (2) when the environment cannot be experienced in the real world; (3) to improve human-machine interfaces; (4) to make training situations real; and (5) to make the perceptible imperceptible. (SK)

This survey elicited experts' perceptions of factors affecting development and use of interactive technologies. Responses from 196 respondents were categorized as hardware/technology, software/programs, acceptance/adoption, accessibility/ease of use, and instruction/learning/communication issues. Based on this categorization, a model of…

Describes human-computer interface needs for empowering environments in computer usage in which the machine handles the routine mechanics of problem solving while the user concentrates on its higher order meanings. A closed-loop model of interaction is described, interface as illusion is discussed, and metaphors for human-computer interaction are…

The first of two articles discusses virtual reality (VR) and online databases; the second one reports on an interview with Thomas A. Furness III, who defines VR and explains work at the Human Interface Technology Laboratory (HIT). Sidebars contain a glossary of VR terms and a conversation with Toni Emerson, the HIT lab's librarian. (LRW)

Reexamines human factors of human-machine systems from an individual and organizational behavior standpoint, particularly as they relate to library automation. Attitudes about automation, the successful introduction of change, the impact of automation on organizational structure, the impact on humans, and leadership within the human-machine system…

Discusses elements involved in the visual design of the computer-learner interface. Topics discussed include the need for consistency in screen layout; information representation, including accuracy in images and visual cuing strategies; and menu selection interfaces, or command representations, including their placement on the screen. (11…

This seventh in a series on performance technology discusses the means an organization uses to support human performance. Five basic elements are described: (1) the opportunity an individual has to perform as the organization desires; (2) technology, including human-machine roles; (3) materials and supplies; (4) the flow of useful information; and…

Discusses issues relating to reading text on computer screens and considers how to optimize screen presentation of text, particularly for academic journals. Topics discussed include reading as a physical and cognitive skill; classifying text according to reader-relevant criteria; and the design implications of these factors for electronic journal…

Discusses electronic commerce and presents the concept of Web assistants, human assistants working in an electronic Web shop. Presents results of a usability study of a prototype adaptive Web assistant system that show users were enthusiastic about the concept of Web assistants and its implications. (Author/LRW)