Dennis is sitting on a train and is looking at the mountains in the distance. He suddenly becomes aware that the trees and signs that are very close to the tracks look as if they are moving by far more rapidly than the mountains that are several miles away. Those mountains look as if they are just crawling by. Dennis is currently using ____ to determine the distance of what he is seeing.
A) kinetic cues
B) visual expansion
C) texture gradient
D) motion parallax

Question

Dennis is sitting on a train and is looking at the mountains in the distance. He suddenly becomes aware that the trees and signs that are very close to the tracks look as if they are moving by far more rapidly than the mountains that are several miles away. Those mountains look as if they are just crawling by. Dennis is currently using ____ to determine the distance of what he is seeing.
A) ​kinetic cues
B) ​visual expansion
C) ​texture gradient
D) ​motion parallax

Quizplus · Accepted Answer

Dennis is using motion parallax to determine the distance of what he is seeing. This is because motion parallax is the perceived difference in the speed and direction of movement between objects that are close to the observer compared to those that are further away. In this case, the trees and signs close to the tracks appear to be moving rapidly, while the mountains in the distance appear to be moving slowly. This gives the viewer a sense of depth and distance in the scene.

Dennis Is Sitting on a Train and Is Looking at the Mountains