To measure _____, the experimenter decreases the intensity difference between the light bars and the dark bars until an observer can just barely detect the difference between the dark bars and the light bars.
A) Mach bands
B) contrast threshold
C) phase continuity
D) brightness constancy

Question

Quizplus · Accepted Answer

Contrast threshold is the minimum difference in brightness between parts of an image required for an observer to perceive a difference. Therefore, by decreasing the intensity difference between the light bars and the dark bars until an observer can barely detect the difference, the experimenter is measuring the contrast threshold.

To Measure _____, the Experimenter Decreases the Intensity Difference Between