The psychological trick behind getting people to say yes

Quiz: Are you a sucker or a master Watch more from Making Sene: Read more economic news: Asking for someones phone number in front of a flower shop will be more successful because the flowers prime us to think about romance. Small, subliminal cues change our willingness to be sold on a product, on ideas or even a date. Economics correspondent Paul Solman speaks with psychology professor Robert Cialdini about his book, PreSuasion, the crucial step before persuasion.