
66 Ergonomics in the Automotive Design Process
VISUAL CAPABILITIES
Psychophysical methods are used to measure different visual capabilities. Some commonly consid-
ered visual capabilities of the drivers are
1. Detection of objects (e.g., visibility of visual targets)
2. Perception and identication of colors
3. Differences (or change) in luminance
4. Equality of appearance (e.g., if two trim parts “match,” i.e., the appearance of the two trim
parts is equal by considering their color, brightness, and texture)
5. Difference (or change) in colors (color differentiation or change in color coordinates needed
to perceive a color difference)