In a Classic Study on Depth Perception, Gibson and Walk

Multiple Choice

In a classic study on depth perception, Gibson and Walk placed infants of various ages on a fabric-covered runway that ran across the center of a clever device called a visual cliff. In the study, _____.

A) girls refused to cross the visual cliff but boys crossed it
B) boys crossed the visual cliff faster than girls
C) infants crossed the cliff when their mothers encouraged them to do so
D) eight out of ten crawling infants refused to cross the seemingly unsupported surface of the visual cliff