How could one best tell if curvature is truly a primitive perceptual feature?
A) One could determine whether the threshold for curvature is lower than for other attributes, such as color.
B) One could determine whether or not the observer can describe a curved line in detail.
C) One could note how quickly a stimulus with one type of curvature is noticed in an array of stimuli made up of a different type of curvature.
D) One could ask an observer to stare at a curved line and then note whether the observer experiences an afterimage effect from the curvature.

Question

Quizplus · Accepted Answer

The speed at which an observer can detect a stimulus with a certain curvature in an array of stimuli with different curvatures is a good indicator of whether curvature is a primitive perceptual feature. If curvature is a primitive feature, it should be detected quickly and efficiently, indicating the brain processes this particular attribute differently than other attributes.

How Could One Best Tell If Curvature Is Truly a Primitive