in Influence: The Psychology of Persuasion Dr. Robert B. Cialdini breaks down the psychology behind why people say “yes.” There are six universal principles behind persuasion: 1. Reciprocity – pay back what we receive 2. Scarcity – people want what they can't have 3. Authority – people follow credible experts 4. Consistency – consistency with past actions 5. Liking – people say "yes" to things they like 6. Consensus – looking for what others have done Dave printed out these six principles and has them taped to the top of his desk. That way every time he writes a new email or blog post he
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