Well-known psychological effect: diffusion of responsibility effect
At 15:20 on March 13, 1964, outside an apartment in New York before a call Juno young women than the white bar at the end of work between the assassination of the way home. When she cries in despair: "Some people want to kill! For help! For help!" Heard shouting nearby residents lit the lamp, opened the window, the attackers run away in terror. When everything is calm, the killer returned to commit crimes. When she raised hue and nearby residents has opened the lights, the attackers then ran away. When she considered to have nothing to do, to return to their home upstairs, the killer once again appeared before her, kill her on the staircase. In this process, even though she shouted for help, her neighbors in at least 38-bit to the window watching, but no one to rescue her, or even no one to call the police. This incident caused a sensation in New York society, but also attracted the attention of social workers, psychology, and thinking. People have such a large number of spectators neglecting the effects of the phenomenon known as the duty to spread.
For the responsibility of the reasons for the formation of scattered effects, psychologists conducted a large number of experiments and surveys found that: this phenomenon can not simply say that everybody's callous, or moral turpitude increasing performance. Since on various occasions, people's acts of assistance that is really different. When a person is faced with an emergency situation, if only he can provide help, he would clearly aware of their responsibilities, and to the victims to help. And if the presence of so many people to help seekers of responsibility by everyone to share, resulting in diffusion of responsibility, shared responsibility of each person little bystander or may not even his own sense of responsibility that one can not, resulting in a kind of "I do not rescue, rescue by someone else" mentality.
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