B. Color Vision 1. Saturation is the psychological dimension that captures the purity and vividness of color sensations. Brightness is the dimension of color experiences that captures the intensity of light. Color Vision cont. Afterimages or aftereffects of visual stimulation may be either positive or negative.
Negative afterimages are the opposite or the reverse of the original experience.
More common and longer lasting. Positive afterimages are caused by a continuation of the receptor and neural processing following stimulation. Rare and brief. Color blindness is the partial or total inability to distinguish colors. Flag won t work if you are color blind.