The Mind's Shortcuts · heuristic
Jakob's Law
Playable Play this law (~3 min)or keep reading below ↓
Users spend most of their time on other sites and apps, so they expect yours to work the same way as all the ones they already know. Meeting those learned conventions lets people transfer existing skills to your product; breaking them for novelty's sake imposes a 'relearning tax' that usually costs more than the originality is worth.
See it on a real screen
Logo top-left, search in the middle, cart top-right with a little count badge. Nobody taught you that — a thousand other stores did. Meeting that learned convention is exactly what Jakob's Law is about.
Where it comes from
The law is named for Jakob Nielsen, co-founder of the Nielsen Norman Group, who articulated it around 2000 out of decades of usability testing. Its roots run to the physical world of mental models: people carry expectations built from every door, dashboard, and remote control they've ever used, and they apply those expectations to anything new. A light switch flips up for on because a lifetime of switches taught you so — and users approach your interface with exactly that accumulated set of assumptions about how things 'should' work.
Origin: learned conventions from a lifetime of everyday interfaces
In the wild
- E-commerce carts
The shopping-cart icon lives top-right almost everywhere, so users look there first — matching the convention makes checkout effortless.
- Media player controls
Play, pause, and a left-to-right scrubber are near-universal; a player that reinvented them would force everyone to relearn.
- Login placement
Sign-in top-right, logo top-left — conventions strong enough that users assume them before they even look.
Further reading
Don't just read it — feel it.
Play the 3-minute game and let your own reactions prove the law.
Play the lesson