Is Display/Control Gain a Useful Metric for Optimizing an Interface?
- 1 December 1990
- journal article
- research article
- Published by SAGE Publications in Human Factors: The Journal of the Human Factors and Ergonomics Society
- Vol. 32 (6) , 651-663
- https://doi.org/10.1177/001872089003200604
Abstract
Two studies were conducted to determine the adequacy of display/control gain as a metric for characterizing a control-display interface consisting of a CRT display and a separate input device. The first study examined the effect of independent changes in the control input and the display output on cursor positioning performance with two input devices: a touch tablet and a trackball. The second study separated the effects of control amplitude, display amplitude, and display target width. Results indicate that display/control gain is not an adequate specification for performance. A combination of gain and Fitts' index of difficulty may be a useful predictor.Keywords
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