Beware of misleading research, at the end of this article they briefly explain the truth, that this bias is aquired and not INNATE. It has already been proven that people are equally implicitly prejudice of their own race in situations were that race is stigmatized. This study wont explain that because its redundant. Bias is acquired and has nothing to do with our DNA, although thats the idea they are trying to convey in the headlines...

If you want to test how bias you are go here

https://implicit.harvard.edu/implicit/

In these studies it is found that members of a particular group (black people for instance) will be just as implicitly prejudice as a white person in situations when they have been indoctrinated and acculturated with negative stereotypes about their group. Like A black kid watching the show cops, or gangster rap videos . This also is the reason why there are so many psychological problems amongst these minority individuals, because they have been conditioned to hate themselves.

All the current study did was identify brain activity in the same way this test detects bias, it says nothing as to how that came to be.