ERIC Number: ED082487
Record Type: Non-Journal
Publication Date: 1973-Jun
Reference Count: N/A
Human Factors in the Design of a Computer-Assisted Instruction System. Technical Progress Report.
Mudge, J. C.
A research project built an author-controlled computer-assisted instruction (CAI) system to study ease-of-use factors in student-system, author-system, and programer-system interfaces. Interfaces were designed and observed in use and systematically revised. Development of course material by authors, use by students, and administrative tasks were integrated into one system whose nucleus was a display-based interactive author language (DIAL). The design permitted systematic language implementation and easy language modification and used a translator writing system (TWS) to generate compilers. Authoring by teachers required simplicity of the language and its operational environment. A measured high level of user acceptance proved the design to be sound, and a significant reduction in authoring time was achieved. DIAL was observed to be a superior language, for machine intrusion was low and other syntactic improvements were possible. An answer-evaluating technique, called the sieve, was devised and a syntactically improved DIAL/2 language derived. The TWS helped to implement DIAL and to remediate language weaknesses. Although the TWS was not available for the command language of the operational environment, the human-factors debugging period revealed the desirability of such. (Author/PB)
Publication Type: N/A
Education Level: N/A
Sponsor: National Science Foundation, Washington, DC.
Authoring Institution: North Carolina Univ., Chapel Hill. Dept. of Computer Science.