BJ Fogg's Behavior Model

Kosh built a round-up feature: every payment is rounded up to the next ₹10 and the change goes into savings. Users love the idea in interviews, yet only 4% switch it on. The team's first instinct is a campaign to make people "more motivated". A simple model tells them to look somewhere else first.

The rule

A behavior happens when motivation, ability and a prompt meet at one moment.

Stanford researcher BJ Fogg sums it up as B = MAP:

• Motivation — how much the person wants to do it right now. It rises and falls through the day.
• Ability — how easy it is for them right now. Anything that costs time, money, physical effort or mental effort, or that breaks their routine, lowers ability.
• Prompt — the thing that says "do it now": a notification, a button in view, a friend's message, the end of another task.

Motivation and ability trade off. Picture a curve Fogg calls the action line. When someone is very motivated, they will do even a hard thing. When a thing is very easy, a little motivation is enough. If a prompt arrives while the person sits above the line, they act. Below it, the prompt fails and often just annoys them.

And with no prompt, nothing happens at all — however motivated and able the person is.

Because motivation is unreliable, the dependable lever is usually ability: making the behavior easier works on good days and bad ones.

The shortcut

When a behavior is not happening, check the three factors in this order: Prompt? Ability? Motivation? The first two are usually cheaper to fix and more often the real problem.

The trap is jumping straight to motivation — rewards, pep talks, dramatic messages — when users already want the behavior and are simply never asked, or find it too hard.

Drills

Answer fast — trust the rule.

Remember

• A behavior happens when motivation, ability and a prompt meet at one moment: B = MAP.
• Shortcut: debug in the order prompt, ability, motivation.
• Trap: trying to pump up motivation when the action is hard or nobody asked.