No bridge too high: Infants decide whether to cross based on the probability of falling not the severity of the potential fall

Karen Adolph
Fourteen-month-old walkers and 11-month-old crawlers decided whether to cross wide and narrow bridges (2-60 cm) spanning a large (71-cm) or small (17-cm) drop-off to reach their caregivers who encouraged them from the far side of the bridge. An additional group of 14-month-olds walked over a "visual bridge" apparatus, designed to match an apparatus with a real bridge and drop-off. Here, the drop-off and bridge were only illusory. Bridge widths were presented with a psychophysical staircase...
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