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On the selection and evaluation of visual display symbology Factors influencing search and identification timesThree single-target visual search tasks were used to evaluate a set of cathode-ray tube (CRT) symbols for a helicopter situation display. The search tasks were representative of the information extraction required in practice, and reaction time was used to measure the efficiency with which symbols could be located and identified. 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 did the numeric characters. The results suggest that a symbol set is, in some respects, like a list that must be learned. Factors that affect the time to identify items in a memory task, such as familiarity and visual discriminability, also affect the time to identify symbols. This analogy has broad implications for the design of symbol sets. An attempt was made to model information access with this class of display.
Document ID
19870038565
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Remington, Roger
(NASA Ames Research Center Moffett Field, CA, United States)
Williams, Douglas
(Psycho-Linguistic Research Associates Menlo Park, CA, United States)
Date Acquired
August 13, 2013
Publication Date
August 1, 1986
Publication Information
Publication: Human Factors
Volume: 28
ISSN: 0018-7208
Subject Category
Man/System Technology And Life Support
Accession Number
87A25839
Distribution Limits
Public
Copyright
Other

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