Lying Kids More Likely to Succeed (Honest!) Researchers believe it's a sign of mental development By Kevin Spak, Newser Staff Posted May 17, 2010 11:40 AM CDT 21 comments Comments This girl could be a CEO someday. (Shutterstock) (Newser) – Don't get angry if little Johnny fibs: The ability to lie well and lie early indicates a fast-developing brain, according to some researchers, who suggest that kids who are convincing liars may grow into more successful adults. “Almost all children lie,” says Dr. Kang Lee, who headed the study. “Those who have better cognitive development lie better because they can cover up their tracks. They may make bankers later in life.” Of course, Dr. Lee doesn't seem to have actually tested how successful children are later in life—his research merely tracked how early they lie. The study gave various tests to children aged 2 to 16. They found that the two-year-olds only lied 20% of the time, but by age 4 that was up to 90%. By age 16, that fell to 70%, reports the Telegraph.