When Jim looks at his raised finger, he can make it "jump" from one location by looking at it with only his left eye and then with only his right eye. This perception that Jim's finger is in two different places (when it is not) is called

a. perspective.
b. relative retinal size.
c. perceptual constancy.
d. depth perception.
e. retinal disparity.

Answer: e. retinal disparity.