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Kari S. Kretch and Karen E. Adolph No bridge too high: Infants decide whether to cross based on the probability of falling not the severity of the potential fall Developmental Science 16

Version of Record online: 9 FEB 2013 | DOI: 10.1111/desc.12045

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Do infants, like adults, consider both the probability of falling and the severity of a potential fall when deciding whether to cross a bridge? Crawling and walking infants were encouraged to cross bridges varying in width over a small drop-off. Bridge width affects the probability of falling, whereas drop-off height affects the severity of the potential fall. Crawlers and walkers crossed bridges based only on the probability of falling: They attempted to cross in accordance with bridge width. But infants did not consider the severity of the potential fall: Attempts were identical on the small and large drop-off.

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