Abstract
A human factors experiment was conducted using a simulated military display, resembling a radar display tube, to determine the effect upon operator's performance of varying certain aspects of the displayed symbols. Color was added (a redundant coding dimension) as well as extra irrelevant symbols and their effects upon the operator's ability to make aircraft intercepts were measured. The results have application to tactical data systems and any other military systems where a large quantity of data must be presented for the observer's immediate assimilation and use.
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