Design behavior with the Fogg Behavior Model (B=MAP)

A behavior happens only when Motivation, Ability, and a Prompt arrive at the same moment.

Why it works

Fogg’s model decomposes "I can’t make myself do this" into three separable factors: how much you want it (motivation), how hard it is (ability), and whether something triggers it (prompt). Because motivation is volatile and unreliable, the durable lever is to raise ability — make the behavior easier — until even a low-motivation moment is enough to act on the prompt.

How to do it

1. When a behavior isn’t happening, diagnose which factor is missing: motivation, ability, or prompt.
2. Default to fixing ability first — shrink the behavior — rather than trying to manufacture motivation.
3. Make sure a clear prompt exists; a wanted, easy behavior still won’t fire without a trigger.

Evidence

The B=MAP model is a widely taught behavior-design framework developed at Stanford. It synthesizes established findings (motivation is unreliable; reducing effort raises follow-through) into a working model rather than a single tested claim. (mechanistic)

The model is a practitioner framework, not an experimentally validated equation; treat the three factors as a useful diagnostic, not a formula.

Common mistake

Trying to win on motivation — hyping yourself up — when the real blocker is that the behavior is too hard or has no prompt.