Abstract
This paper presents the results of an experiment in which subjects were taught to fly five flight maneuvers using three different types of displays: traditional round-dialed instrument panel, a linear tape type of HUD, and a HUD which utilizes digital symbols for the flight parameters. After achieving a pre-determined level of proficiency on each of the displays, the subjects had to perform each of the maneuvers on each of the displays while performing a secondary task of reporting the presence of odd-even-odd sequences of digits from a continuous string of digits presented by a tape recorder. Overall, the learning of the basic maneuvers, the results showed the abstract display to require more trials to learn than the traditional display, but as the third display to be learned there were no significant differences between display types.
After all subjects met the same criterion level of performance with each type, performance under loading stress was poorer using the abstracted display.
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