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Mar. 17, 2021 , 2:00 PM
That annoying person walking down the street with their head buried in their cellphone don’t lie, sometimes it’s you isn’t just slowing themself down. They’re also hamstringing other people’s ability to move quickly and efficiently, according to a new study.
Like flocks of birds or schools of fish, human crowds self-organize to move safely and efficiently. (Think different lanes of people walking down a sidewalk.) But such efficiency is only possible when people can anticipate others’ moves.
To test how a phone tapper might mess with this flow, scientists set up a straight corridor on a closed-off street for two groups of 27 pedestrians to walk down in opposite directions. They tracked each person’s path of travel, measured their walking speed, and calculated the groups’ order parameter, which measures where and when straight lanes formed. The researchers also tasked three participants in one group with typing on their phones as they strolle
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