Seven-month-old Mazie is crawling toward the end of the bed
How likely is it that she will continue on and fall off?
A) Unlikely, because depth perception develops by about 6 months of age in infants
Correct. By the time infants are crawling, they are able to perceive (and usually avoid) a drop-off. The visual cliff has been used to study this perceptual ability in a variety of species.
B) Unlikely, because her mother will probably stop her before she reaches the end
C) Likely, because infants only use monocular cues when judging depth
D) Likely, because depth perception develops later in childhood
Answer: A
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