The result: when volunteer had direct eye contact with the face, there was an increase of activity in the ventral striatum, a central part of the brain that anticipates reward or pleasure.

• 结果是：如果实验者和照片上的人有过直接的目光交流，他们的前部纹状体活动频率就会增加。前部纹状体是大脑中产生成就感或者愉快情绪的重要部位。