40 Witnesses — Only 3 Called for Help

追加: 2026-05-17

[00:00:00]38 people watched a woman get attacked outside their building. Almost none of them called for help. Your brain would have done the exact same thing. In 1964, Kitty Genovese was attacked for 30 minutes in Queens, New York. Her neighbors heard her screaming, and investigators identified 38 witnesses who saw or heard the assault.

[00:00:21]Psychologist John Darley and Bibb Latané ran an experiment in 1968 to figure out exactly why. When participants believed they were alone, 85% called for help during a fake emergency. When six people were present instead of one, that helping rate collapsed to just 31%.

[00:00:38]The more witnesses, the less responsible each person felt. [music] They called it diffusion of responsibility. Your brain unconsciously scans the crowd for cues about how to react. When everyone else stays calm and still, your brain interprets that as a signal that nothing's wrong, even when it is. This effect is strong enough to work on trained medical students. A 1981 study found bystander inhibition delayed help even when subjects had first aid knowledge and were told someone was injured nearby.

[00:01:08]The effect even works online. Studies show emergency social media posts get fewer responses when shared to large groups. Thousands of people assume someone else already handled it. Right now, in a crowd of strangers, you are statistically the least likely person to save someone's life.

[00:01:26]The very presence of witnesses is what turns 38 people into nobody.