You Are Not So Smart: Why You Have Too Many Friends on Facebook, Why Your Memory Is Mostly Fiction, and 46 Other Ways You're Deluding Yourself

by David McRaney

you agree ahead of time to do something you later don’t feel like doing, you do it anyway so you don’t feel inconsistent or appear so to others. In any situation where you are primed to think of yourself in a certain way, you will be more likely to engage in behavior that proves you are.