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Crawling Experience Helps Infants Gauge Drop-Offs. The Wall Street Journal
A new study suggests that crawling experience—but not age—plays the most important role in the development of depth perception in early childhood. The study, published online in the journal Infancy, found that babies were more likely to avoid the edge of a simulated cliff, or a flight of stairs, if they had been crawling for about six weeks compared with less crawling experience.