John and Jane are just about to sign the papers on a $375,00…

John and Jane are just about to sign the papers on a $375,000 house when the salesman asks if they want to add the central air conditioning package for only $4,700. They think, how cheap!, and decide to buy the air conditioning package. Which principle/technique was used to get them to say yes to the air conditioning package?

Adele has never driven a car with a manual transmission befo…

Adele has never driven a car with a manual transmission before—that is, she’s never had to decide when to shift gears, push in the clutch, or stop suddenly when the car is in gear. She’s just bought a car with manual transmission, and wants to practice driving it before she takes it onto the highway. What should she do?