Display Format Effects on Precision Tracking Performance, Describing Functions, and Remnant.
Final rept. Aug 69-Mar 71,
SYSTEMS TECHNOLOGY INC HAWTHORNE CALIF
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As part of a program to develop a comprehensive theory of manual control displays, six display formats were used by three instrument-rated pilots to regulate against random disturbances with a controlled element of Y sub c Kss 2 which requires mild lead equalization, under both foveal and 10 deg parafoveal viewing conditions. The six display formats were CRT Line, CRT Thermometer Bar, 14-Bar Quantized on a CRT, a Rotary Dial and Pointer meter movement, and two variations of a Moving Scale Tape-Drive C-141 VSI. All were scaled to equivalent movement and apparent brightness. Measures included overall performance, describing functions, error remnant power spectra, critical instability scores, and subjective display ratings. Other controlled elements and parafoveal angles were partially investigated. The results show that the main effect of display format is on the loop closure properties. Author