Bystander effect
SOCIAL PSYCHOLOGICAL PHENOMENON IN WHICH INDIVIDUALS ARE LESS LIKELY TO OFFER HELP TO A VICTIM WHEN OTHER PEOPLE ARE PRESENT
Genovese syndrome; Genovese effect; Bystander problem; Bystander apathy; Bystander non-intervention; Bystander non-intervention effect; Bystander Effect; Sergio Aguiar
The bystander effect, or bystander apathy, is a social psychological theory that states that individuals are less likely to offer help to a victim when there are other people present. First proposed in 1964, much research, mostly in the lab, has focused on increasingly varied factors, such as the number of bystanders, ambiguity, group cohesiveness, and diffusion of responsibility that reinforces mutual denial.