Computer-assisted instruction, graphic presentation methods, instructional technology, CAI systems, CAI authoring
ABSTRACT (Contlnum on rmvmrmm mldm It nmcmmmmry and Idmntlty by block numbmr)The report describes a system developed to support research and development in computer-based instruction. A powerful and versitile CAI language was developed which allows authors to present materials on a graphic display, on slides, or by means of voice synthesisser.
J. J. CLARKIN Commanding Officer
SUMMARY
ProblemA need existed for a computer-assisted instruction (CAI) system capable of supporting varied research needs. Such a system is especially needed for investigations of the value of graphics displays and voice synthesization. The system would utilize widely available computer services, and standard terminal hardware so that the CAI system would be readily transportable.
PurposeThe purpose of this report is to describe the Graphic Terminal Display System (GTDS), which was designed expressly to meet the R&D requirements of the Navy Personnel Research and Development Center (NAVPERSRANDCEN).
Approach
A Graphics Terminal Display System (GTDS) was developed by the SanDiego State University under contract with NAVPERSRANDCEN. The system utilizes an IBM 360/50 computer and interfaces with a largescreen graphics display terminal, a random-access slide projector, and a speech synthesizer. An authoring language, Graphics Assisted Instructional Language (GRAIL), was developed to allow lessonware production for the GTDS. Therefore, the author can present information to a student by means of a visual alphanumeric display, computer graphics, photographs, or synthesized speech. Student responses are transmitted from crosshair cursors on the display or from the keyboard of the terminal. GRAIL has an instruction set making it a versatile CAI author language. Control statements, a FORTRAN subroutine capability, and specific instructions for the flexible utilization of all student station devices combine into a complete closed system.
Findings and ConclusionsThe GTDS provides a powerful capability for research support. It compares favorably with other CAI systems such as PLATO, PLANIT and TICCIT, and is transportable to virtually any IBM 360 or 370 computer system. The widespread availability of such computer systems could make GTDS an attractive alternative for CAI applications.
RecommendationsIt is recommended that the GTDS be further enhanced so that it can be used for a broad range of Navy training and R&D applications.
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