I just stumbled on this and I taught I should share :

The real reason why liars keep lying is not far-fetched. Once a liar, always a liar, the old saying goes. Turns out there’s some scientific truth to that: researchers have tracked down how the brain makes lying easier as the untruths build up, providing some biological evidence for why small lies often balloon into ever larger ones.

In a study published in Nature Neuroscience, Tali Sharot from the department of experimental psychology at University College London and her colleagues devised a clever study to test people’s dishonest tendencies while scanning their brains in an fMRI machine. The 80 people in the study were shown pennies in a glass jar and given different incentives to guide whether they lied or told the truth to a fellow partner about how much money was contained in the jar.

In some conditions, both the participant and the partner benefited if the participant lied; in others, just the...

SOURCE : http://www.myrecentnews.com/career/real-reason-liars-keep-lying/