Bystander effect is a psychological phenomenon that occurs when people are less likely to take action or intervene in an emergency situation when there are other people present. It is also known as the "Genovese Syndrome," named after a woman who was murdered in New York City in 1964 while 38 witnesses did nothing to save her. The bystander effect suggests that the presence of others can inhibit individuals from taking action because they assume someone else will do something instead. Studies have found that the more people present, the less likely an individual is to help, which can lead to tragic consequences.