The Effect of Background Luminance on Color-Coding
Abstract
The effect of background raster luminance on the ability to learn and recall color coded information was studied via a paired-associates paradigm. Twenty color circles, paired with two-digit numbers were presented on a color graphics CRT terminal. On test trials each colored circle was presented by itself and observers were required to verbally recall the two-digit number that was previously paired with the target color. Time to recall as well as actual responses were both recorded. Two raster luminance levels were tested; dark or perceptual black and one that appeared to be a shade of middle gray. Ten out of 10 observers reached the learning criterion with the middle gray background while only 10 out of 15 were able to reach the criterion with the black background. In addition, those observers who reached criterion on the black background still made significantly more errors than the observers presented with the middle gray background. There were no significant differences, however, in time to recall between the two types of backgrounds for observers who reached the learning criterion. These results are discussed in light of lambda E*, a mathematical measure of perceived color differences. Keywords: color-coding; luminance contrast; color discrimination.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 15, 1985
- Accession Number
- ADA159250
Entities
People
- Alan R. Jacobsen
Organizations
- Naval Submarine Medical Research Laboratory