And in fact, when it's the only person just about everybody helps regardless of the color of the person in trouble but when you're with other people there's a big difference.

事实上，在一个人的情景里，任何人都会出手相救,不管陷入困境的人是什么肤色的,但当你旁边有其他人时，那差别就大了。

耶鲁公开课 - 心理学导论课程节选