In a study of vision, researchers placed infants who were mature enough to crawl on a "visual cliff" (i.e., a clear plastic surface with one side looking firm and the other side looking as if it dropped off). The researchers discovered that the child would:
A) not cross from the firm side to the "dropped off" side even when their mothers encouraged them to do so
B) cross from the firm side to the "dropped off" side only if their mothers encouraged them to do so
C) not cross from the firm side to the "dropped off" side only if they had extensive learning experience
D) cross from one side to the other, suggesting they lacked any depth perception

Question

Quizplus · Accepted Answer

The researchers discovered that infants who were mature enough to crawl showed hesitation in crossing from the firm side to the "dropped off" side, even when their mothers encouraged them to do so. This suggests that the infants had depth perception and were able to perceive the visual cliff as a drop-off.

In a Study of Vision, Researchers Placed Infants Who Were