Paper1968
Bystander Intervention in Emergencies: Diffusion of Responsibility
John M. Darley & Bibb Latane
People are less likely to help a stranger in trouble the more other bystanders are present, because responsibility to act is shared out among everyone present rather than falling on any one person - a lab-tested effect independent of the since-disputed newspaper account of Kitty Genovese's murder that first prompted it.
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