Business
Most decisions are made through quick psychological shortcuts, not careful weighing of options. This holds for trivial choices like what to eat and for significant ones like moves at work. To explain a purchase, look at the shortcut that produced it rather than the reasons the buyer gives.
Many choices that feel spontaneous and personal have been shaped in advance by the companies selling to us. The decision seems to come from the chooser. Its framing, context and options were often built to steer it.
You cannot reliably change a decision until you know what actually drives it. So the first step in persuasion is diagnosing which psychological force is at work in the moment of choice. Choosing the message comes after.
Applying evidence about how people actually decide repeatedly makes marketing, pricing and promotion more effective. The gains come from simple, practical adjustments that any team can make. Elaborate theory is not required.