In this study, automatic feedback techniques are applied to Boolean query statements in online information retrieval to generate improved query statements based on information contained in previously retrieved documents. Feedback operations are carried out using conventional Boolean logic and extended logic. Experimental output is included to…

Computerized case simulations have considerable potential application in counseling psychology. Methods have been demonstrated in the present study for quantifying and evaluating performance of both individuals and groups of subjects; these methods appear promising. (Author)

Describes study of undergraduates that examined relationships between types of feedback and learning styles in computer-based instruction. The three treatment conditions that varied in access to feedback are described, analyses of posttests and retention tests are presented, and the age of learners as a factor in learner control effect is…

Describes the development, implementation, and evaluation of a voice interface for the British Library Blaise Online Information Retrieval System. Results of the evaluation show that the use of currently available speech recognition and synthesis hardware, along with intelligent software, can provide an interface well suited to the needs of online…

Outlines an approach to teaching management control activities via the use of case study material, microcomputer technology, and commercially available software. A case study for use by an undergraduate class is described; it includes a single regression analysis, a spreadsheet model, and a description of the man/machine decision process.…

Presents a hyperknowledge framework of decision support systems (DSS). This framework formalizes specifics about system functionality, representation of knowledge, navigation of the knowledge system, and user-interface traits as elements of a DSS environment that conforms closely to human cognitive processes in decision making. (Contains 52…

Describes a study of undergraduates that was conducted to determine students' preferences toward Graphical User Interface versus Command Line Interface during computer-assisted instruction. Previous experience, comfort level, performance scores, and student attitudes are examined and compared, and the computer use survey is appended. (Contains 13…

This report, selected from the results of a larger study of online searching, focuses on the sources of search terms. Terms from users, professional intermediaries, thesauri, and relevance feedback are examined; and the relevance of retrieved items is discussed for each source of search terms as well as for combinations of sources. (12 references)…

Discussion of mathematical modeling, particularly for high school physics curricula, focuses on software that is connected with laboratory work and the inference of mathematical models based on measurements of physical quantities. Fitting procedures are described, and user interface is explained. (Contains nine references.) (LRW)

The most time consuming and expensive step in developing expert systems is knowledge acquisition (KA), and it is important to determine how the limited resources for acquiring knowledge should be allocated across different sources. This paper develops a model that determines how KA resources should be spent and how such a model may be used. (23…

Reports results of a study investigating effects of four user characteristics on users' mental models of information retrieval (IR) systems. Findings indicated that educational and professional status, academic background, and computer experience had significant effects in differentiating users on their factor scores. First language had a…

Describes a graphic modeling, natural language processing system, VerbalImage, which mimics features of human shape reasoning. Subjects read the same text description and were able to recognize the image generated by the computer from among a series of other computer-generated images. Performance on task was as good as for a control group…

Examines differences between the formal features of commercial versus noncommercial Web sites, and the relationship between Web page complexity and amount of traffic a site receives. Findings indicate that, although most pages in this stage of the Web's development remain technologically simple and noninteractive, there are significant…

As publishers make the transition from ink-on-paper to digitalized messages, researchers must ask whether the system is the solution. Are there advantages to presenting newspaper content on computers? Or do people prefer to handle paper? A study reported subjects' self-report responses regarding interface between people (experimental subjects) and…

Instructional Design Expert (ID Expert) is a prototype instructional design expert system which supports the instructional design phase of instructional system development. Phase 2 of ID Expert was implemented using S.1 expert system language on the VAX computer. The user interface was text-based, consisting of a question/answer dialogue primarily…