Brain damaged decision-making

We humans make all the same mistakes, over and over again. It's how we are wired.. To neurophysiologists, who research cognitive functions, the emotionally driven appear to suffer from cognitive deficits that mimic certain types of brain injuries. Not just partisan political junkies, but ardent sports fans, the devout, even hobbyists. Anyone with an intense emotional interest in a subject loses the ability to observe it objectively: You selectively perceive events. You ignore data and facts that disagree with your main philosophy. Even your memory works to fool you, as you selectively retain what you believe in, and subtly mask any memories that might conflict.

Barry Ritholtz writing in the Washington Post