psychopaths

Psychopaths?who have no ability to comprehend the feelings of others and therefore commit the most horrendous crimes?are made, not born. But what makes them the way they are? And how can we spot them before they act?

Caroline Ryan writes in BBC News Online that scientists have found that telling a lie causes increased brain activity, meaning it’s easier to tell the truth. But psychopaths’ brains don’t increase their activity in response to lying because they find it as easy to lie as to tell the truth.
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