Lying increases with maturity

The increase in lying is driven by the development of the ability to see the world from someone else's perspective. We gain an understanding of the beliefs, intentions, and knowledge of others.

The more we lie, the easier it becomes. Among two-year-olds, only 30 percent are untruthful. Among three-year-olds, 50 percent lie. By eight, kids learn to mask their lying by deliberately giving a wrong answer or making their statement seem like a guess.