The document discusses the bystander effect and the case of Kitty Genovese. It describes how the likelihood of bystanders helping decreases as the number of bystanders increases. An experiment found that 85% of participants helped when alone, but this dropped to 31% when they thought others were present. The bystander effect occurs as bystanders go through steps where they can choose not to act. The document also provides tips on how to intervene as a bystander to help prevent bullying.