
Does it take effort to tell the truth or are you naturally honest? In other words, are you truthful or a liar? A Harvard neuroimaging study showed that you're wired to be one or the other.
The study watched subjects' brains as they were presented with the opportunity to win money through lying. When honest people told the truth, their brains were at peace. When dishonest people lied, the control centers of their brains crackled to overwrite the truth with a lie. And here's the cool part: even when dishonest people happened to tell the truth, researchers watched their brains actively override the temptation to lie.