Bystander effect: The bystander effect refers to the phenomenon where individuals are less likely to intervene or offer help when they are part of a larger group.
Diffusion of responsibility: The diffusion of responsibility occurs when individuals feel less personally responsible for taking action because they believe that someone else will step up and help the person in distress.
Social influence: Social influence involves how the presence or actions of others can affect an individual's thoughts, feelings, and behaviors. In this case, the presence of others may lead to decreased helping behavior towards a person in distress.