The Bystander effect is a social psychological phenomenon wherein a bystander is unlikely to help someone in need when there’s presence of other people around. The bystander effect, also known as bystander apathy is inversely proportional to the total number of bystanders. The more the bystanders, lesser chances of someone helping the person in need, the lesser the bystanders, the more are the chances of someone helping the person in need.
The main cause of bystander effect is diffusion or diversion of responsibility. The more the number of people, the lesser the chances of someone helping. This is because they think they are less responsible for helping the person as the responsibility is of a greater number of people and not them alone. There have been several cases which have raised this question. But it is more of a mental or a psychological issue. The society, as a whole, is left in a bitter taste as a consequence of the bystander effect.