When people lie, they are juggling multiple narratives: what they know to be true, what they want to be true, what they are presenting as true, and all the emotions that go along with each—fear, anger, guilt, hope. All the while, they are trying to project a credible image of themselves, which suddenly becomes very, very difficult. Their beliefs and feelings are in conflict with themselves and each other.
Amy Cuddy, PhD, is an American social psychologist, Harvard lecturer, and bestselling author. She is best known for her research into power posing, the act of standing in a posture that engenders feelings of power and confidence.