The bystander effect is a specific type of diffusion of responsibility—when people's responses to certain situations depend on the presence of others. The bystander effect occurs when multiple individuals are watching a situation unfold but do not intervene (or delay or hesitate to intervene) because they know that someone else could intervene, and they feel less responsibility to do so. This is directly caused by the diffusion of responsibility, as it is shown that individuals are much less likely to intervene in a situation when he or she knows others are watching; thus, the responsibility for helping is spread among the group of bystanders, and each bystander does not feel a strong responsibility to do so, so no one helps.