This paper presents a study on the effects of various data compression methods from the viewpoint of central computer to terminal communications on a large graphics oriented timesharing system, PLATO IV. The desired goal is to increase terminal display speed without significant increase in the transmission error rates. While the major emphasis in…

This report describes SpaceGraph, a new computer-driven display technology capable of showing space-filling images, i.e., true three dimensional displays, and discusses the advantages of this technology over flat displays for use with the instructor/operator station (IOS) of a flight simulator. Ideas resulting from 17 brainstorming sessions with…

Noting that the use of all-capital print on microcomputer screens eliminates the configuration clues (ascending and descending letters that create the physical shape of the word) that help a reader recognize a word and read more quickly, a study was conducted to examine the effect of all-capital print versus standard mixed print on reading speed…

Describes INVIDO (systeme d' INformations VIsuelles a DOmicile), a graphical tool which was designed and implemented for studying user reactions to the various types of graphic information displays used by videotex systems. Sample display illustrations included depict weather forecasts and sports and lottery results. (Author/JL)

Discusses ways of providing graphic support in computer-based learning environments, outlines a simple case study involving a situation requiring graphic support, and describes several author language/systems that contain facilities to support the use of graphics. (MBR)

A comprehensive development process for display design, focusing on computer-generated cathode ray tube (CRT) displays is presented. A framework is created for breaking the display into its component parts, used to guide the design process. The objective is to design or select the most cost effective graphics solution (hardware and software) to…

This investigation of the encoding features of graphs begins with a description of a cognitive framework which allows designers to factor into the process of designing displays how people interpret the information found and what display properties are responsible for this interpretation. The framework also provides a performance measure for use in…

Describes an experimental framework and field experiment that investigated the combined effects of information display formats, task characteristics, and cognitive style on the interpretation accuracy, user preference for display formats, and learning of experienced engineering project managers engaged in decision making activities. The findings…

This document presents a discussion of the development of a set of software tools to assist in the construction of interfaces to simulations and real-time systems. Presuppositions to the approach to interface design that was used are surveyed, the tools are described, and the conclusions drawn from these experiences in graphical interface design…

A recent needs study determined that most of the terminal requirements for military computer assisted instruction (CAI) applications can be satisfied with mainstream commercial terminals. Additional development, however, is likely to be required to satisfy two of the capabilities (limited graphics and prerecorded visuals). The expected…

Describes the design of a database interface for infrequent users of computers which consists of a graphical display of a model of a database and a natural language query language. This interface was designed for and tested with physicians at the University of Texas Health Science Center in Dallas. (LRW)

Both high school and college students served as subjects for an evaluation of the effectiveness of a computer-animated test of science problem-solving skills designed to minimize problems inherent in printed tests. The test development process is reviewed, and observations and conclusions relating to screen design and human interaction factors are…

This manual provides documentation for the design, construction, and operation of an interactive electronics training panel developed for a computer assisted performance training carrel. The panel is a plug-in module designed to simulate electronic circuitry and a PMS-6 multimeter as required for a troubleshooting fundamentals lesson in an Air…

The search for a satisfactory computer graphics input system led to this version of an analog sheet encoder which is transparent and requires no special probes. The goal of the research was to provide high resolution touch input capabilities for an experimental minicomputer based intelligent terminal system. The technique explored is compatible…

Two computer assisted instruction programs tested the effects of plain and enhanced screen designs with or without information about those designs and task-type on time and learning. Subjects were 140 fourth grade students in Lincoln, Nebraska who had extensive prior experience with computers. The enhanced versions used headings, directive cues,…