Blink coding for information display

Ten men scanned cathode-ray-tube displays to search for designated target items. Search time increased with increasing display density, and was 50% faster when a 3-cps blink was imposed on items of the target class. The blinking of nontarget items was almost equally effective, indicating that blink...

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Bibliographic Details
Published in:Human factors 1971-06, Vol.13 (3), p.283-290
Main Authors: Smith, S L, Goodwin, N C
Format: Article
Language:English
Subjects:
Blinking
Cathode ray tubes
Coding
Displays
Efficiency
Electronics
Humans
Information Theory
Legibility
Light
Male
Searching
Space life sciences
Visual Perception
Visual tasks
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Summary:Ten men scanned cathode-ray-tube displays to search for designated target items. Search time increased with increasing display density, and was 50% faster when a 3-cps blink was imposed on items of the target class. The blinking of nontarget items was almost equally effective, indicating that blink can be used either as an inclusion or exclusion code. In comparison with steady, nonblinking displays, search time was not significantly different for displays in which all items blinked, or in which a random selection of items blinked. It is concluded that for visual search tasks of the kind reported here, there is no marked deleterious effect of blink coding on symbol legibility, and no marked interference attributable to irrelevant blink.
ISSN:0018-7208
1547-8181
DOI:10.1177/001872087101300309