Why the laws of UX are worth memorising
The laws of UX are shorthand for how people perceive and behave — mostly borrowed from cognitive psychology and the Gestalt school and adapted for interfaces. Knowing them does two things. It makes your critiques sharper: instead of “this feels cluttered,” you can say “this violates the Law of Proximity — related fields aren’t grouped.” And it makes your interview answers land: naming Hick’s Law when you simplify a menu, or Fitts’s Law when you size a primary button, is exactly the vocabulary a design interviewer is listening for.
They are heuristics, not physics. The Aesthetic–Usability Effect reminds you that a pretty interface can hide real problems; Tesler’s Law warns that complexity you remove from the user has to go somewhere. The skill isn’t reciting them — it’s knowing which one applies to the problem in front of you, which is exactly what the scenario questions above rehearse.
Want to go deeper? Laws of UX by Jon Yablonski is the canonical short read — it’s on our list of the best design books. And when you’re ready to apply the laws under pressure, take them into a whiteboard challenge or read the prep guides.
This is the first in a series of free designer learning tests. Take the quiz, keep the cheat sheet, and put the laws to work on a real prompt.
Browse the challenges →