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MET therapists build up motivation by encouraging their patients to talk about their healthy desires. There’s an old saying: “We don’t believe what we hear, we believe what we say.” For example, if you give someone a lecture on the importance of honesty, then have them play a game in which cheating is rewarded, you’ll probably find that the lecture had little effect. On the other hand, if you ask someone to give you a lecture on the importance of honesty, they will be less likely to cheat when they sit down to play the game. MET is a little manipulative. When the patient makes a statement the therapist likes, referred to as a pro-change statement, such as, “Sometimes I have trouble getting to work on time after a night of heavy drinking,” the therapist responds with positive reinforcement, or a request to “tell me more about that.” On the other hand, if the patient makes an anti-change statement, such as, “I work hard all day, and I deserve to relax in the evening with a few martinis,” the therapist doesn’t argue, because that would provoke more anti-change statements as the debate goes back and forth. Instead, she simply changes the subject. Patients usually don’t notice what’s going on, so the technique slips past their conscious defenses,
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Daniel Z. Lieberman (The Molecule of More: How a Single Chemical in Your Brain Drives Love, Sex, and Creativity―and Will Determine the Fate of the Human Race)