Imagine this: You are asked to do a tedious and boring task, like fit wooden pegs into holes. After you have done the task, someone pays you to lie about what it's like. 'I really enjoy doing it,' you tell another person, 'and I think you will, too!'
If you are like many people, you probably believe that you know what you feel and what the lie is. But believe it or not, some studies have shown that people don't always know exactly how they feel. Instead, they use their own behavior to guess about what they are feeling. Self-perception theory says that, 'When people are unsure about their feelings and motivations, they will use their own behavior to infer what they feel.'
What does that have to do with the scenario above? When we lie to someone else, we sometimes begin to believe our own lies. We look at our own behavior - in this case the lie - and make an inference. So, in the example above, lying about your feelings could cause you to believe your own lie! You are using your behavior to figure out how you feel about something. You might be surprised at how often this happens.