Grant perceives snow as remaining white on cloudy days as well as on bright ones. He is not fooled even though the amount of light the snow reflects is different on cloudy days. Grant's perception is due to:
A) convergence.
B) brightness constancy.
C) relative clarity.
D) texture gradients.

Question

Quizplus · Accepted Answer

Grant's perception is due to brightness constancy. Brightness constancy refers to our ability to perceive an object as having a constant level of brightness, even when the amount of light reflected from the object varies due to changes in illumination. So, even though the amount of light reflected by snow on cloudy days is less than on bright ones, Grant still perceives the snow as remaining white due to brightness constancy.

Grant Perceives Snow as Remaining White on Cloudy Days as Well