[wavemode]

Just want to point that the bystander effect (like many classic theories in psychology, it seems) could not be replicated in a real-world study: https://en.wikipedia.org/wiki/Bystander_effect#Counter_examp...

In real life, many people really do jump in to help when they know help is needed.

[sandman008]

No OP, but bystander effect is definitely real. *Anecdotal example* : got immediate response for my email after addressing specific person. This was after repeated appeals for help/response to entire team on same email chain.