Marketing Psychology

Leading words: loss aversion, social proof, anchoring, paradox of choice, Zeigarnik effect, IKEA effect, reciprocity, commitment & consistency, Fogg behavior model, ethical influence.

Apply cognitive biases and behavioral models to product surfaces — ethically. The goal is to reduce cognitive load, surface genuine value, and help the user act on what they already want — not to manipulate.

Decision model — surface → principle

Pick the surface the user is working on, then apply the primary principle (secondary principles reinforce). Depth on each principle lives in references/principles.md.