The evaluation of display symbology - A chronometric study of visual searchThree single-target visual search tasks were used to evaluate a set of CRT symbols for a helicopter traffic display. The search tasks were representative of the kinds of information extraction required in practice, and reaction time was used to measure the efficiency with which symbols could be located and identified. The results show that familiar numeric symbols were responded to more quickly than graphic symbols. The addition of modifier symbols such as a nearby flashing dot or surrounding square had a greater disruptive effect on the graphic symbols than the alphanumeric characters. The results suggest that a symbol set is like a list that must be learned. Factors that affect the time to respond to items in a list, such as familiarity and visual discriminability, and the division of list items into categories, also affect the time to identify symbols.
Document ID
19850035664
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Remington, R. (NASA Ames Research Center Aero-Space Human Factors Research Div., Moffett Field, CA, United States)
Williams, D. (Psycho-Linguistic Research Associates Menlo Park, CA, United States)