Brain scans: the amygdala that registers fear does react when one first observes a person from a different ethnic background—but there can be a significant variance in the response based on a variety of internal and external influences. The brain’s initial reaction can decrease in less than half a second. When faced with any belief that conflicts with one’s own, it takes additional effort and time to override biologically based cognitive biases, but by doing so you can become more open minded. (Newberg, Andrew, MD and Mark Robert Waldman. Why We Believe What We Believe. P 87-90. NY:Free Press, 2006)