Professor elaine fox at essex university showed more than 100 people positive and negative pictures on a computer screen , such as growling dogs and smiling children .
Elaine lissner , director of the male contraception information project , formed a foundation to develop other approaches .
男性避孕术信息项目总监伊莱恩里斯纳成立了一个基金会开发其他方法。
So elaine fox and her colleagues at the university of essex , in britain , wondered whether genes play a part in the selective attention to positive or negative material , with consequent effects on outlook .