" For 10 points, name this psychological effect exemplified by
 the murder of Kitty Genovese that posits people in a large group are less likely to help someone during a
 crisis.
One test of this phenomenon found participants would impulsively touch people holding a live electric
 wire. In addition to Clark and Word's study about ambiguity's role in promoting it, one test had participants
 fill out a survey while pumping the room full of smoke, while another test had subjects listen to a recording
 of a woman screaming. It was first outlined by Bibb Latane and John Darley in an article that argued it may
 result from the "diffusion of responsibility." For 10 points, name this psychological effect exemplified by
 the murder of Kitty Genovese that posits people in a large group are less likely to help someone during a
 crisis.
One test of this phenomenon found participants would impulsively touch people holding a live electric
 wire.
{bystander} effect [prompt on {Kitty Genovese effect} before the name is read]