The responsibility dispersion effect, also known as the bystander effect, means that for a certain event, if a single individual is required to complete the task individually, the individual's sense of responsibility will increase. However, if the group is required to complete the task together, each individual in the group will have Responsibility will weaken, and even irresponsibility and responsibilities will not be fulfilled. This effect often happens to many bystanders after an accident. According to the above definitions, Which of the following situations are not part of the decentralization effect:. ['A man with foaming mouth fell on the street, and Xiaoming thought, "Someone will hit 120".', "The neighbor's house was on fire, Xiao Wu and other neighbors escaped from the corridor.", 'A child was hit by a car in the middle of the road, and passing vehicles were detouring.', 'A lady was attacked by a gangster in the downtown area and shouted "help" several times without being rescued.']