In the gibson and walk visual cliff study, a. one-month-olds did not cross the visual cliff b. boys crossed the visual cliff earlier 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 visual cliff

The correct answer is letter C.

Explanation: Visual Cliff was an experiment created by psychologists Eleanor J. Gibson and Richard D. Walk done at Cornell University to investigate the perception in animals and humans.

They examined perceptual differences at some ages in human infants without documented visual or motor impairments.

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