LCD Versus CRT Displays: Visual Search for Colored Symbols
Defence and Civil Institute of Environmental Medicine Toronto, Ontario Canada
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We examined visual search performance using 52-cm liquid-crystal LCD and cathode-ray tube CRT displays. Twenty-four participants searched for color-coded navy tactical display symbols using LCD and CRT displays viewed on and off-axis 60 degrees of azimuth. Observers sensitivity was lower when searching for red and blue symbols vs. white viewed off-axis on the LCD, with no comparable problem for off-axis CRT. Colored symbols viewed off-axis on the LCD also produced longer response times in feature search and lower search efficiency in conjunction search. Color coding improved search efficiency overall, relative to an earlier experiment with monochrome white symbols 20-80 vs. 200 ms per item.