Editing Diffusion of responsibility (section)

===Group size===
Because of the diffusion of responsibility, people feel that their need to intervene in a situation decreases as the number of other (perceived) witnesses increases. In an experiment that [[John M. Darley|John Darley]] and [[Bibb Latané]] conducted in 1968, it was found that a subject was much less likely to help someone having a seizure when the subject thought that at least one other subject was also hearing the individual have a seizure. The subject's likeliness to help decreased with the number of other subjects (up to four) he or she thought were also listening to the seizure. Group size is a key factor to the diffusion of responsibility, as in a different study, it was additionally found that the probability of an individual volunteering to be a primary helper or leader also decreases as the size of the group grows.<ref name="Barron Yechiam 2002"/>