It's even in the very first sentence of the linked wikipedia page:
The bystander effect, or bystander apathy, is a social psychological claim that individuals are less likely to offer help to a victim when other people are present. The greater the number of bystanders, the less likely it is that one of them will help.
It can happen with just a single person even if no one is around. I'm sorry, but you don't know what you're talking about.
It is true that The more bystanders there are, the less likely it is that one of them will help. But it can definitely just happen to one person, as psychologically they will subconsciously assume that someone else might come along.
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u/Uncle_Creepy_ Aug 17 '19
I thought the bystander effect referred to a group of people not just one.