When one is looking straight ahead at one's navigation goal while walking forward, the pattern of optic flow tells the person that his or her:
A) focus of expansion moves inward from the periphery.
B) focus of expansion is shrinking.
C) heading is toward a stationary object in the scene.
D) heading is directly toward the focus of expansion.

Question

Quizplus · Accepted Answer

The focus of expansion is the point in the visual field that does not appear to move as an observer moves forward. It indicates the direction of movement. When looking straight ahead towards a navigation goal, the pattern of optic flow suggests that the heading is directly toward the focus of expansion, as everything in the visual field seems to flow out from this point.

When One Is Looking Straight Ahead at One's Navigation Goal