Laws of UX

Jakob’s Law

Users expect your website to work like the other websites they already use.

Miller’s Law

Don’t make users remember too much at once.

Fitt’s Law

Big and close buttons are easier to hit. 

Hick’s Law

More choices can mean slower decisions.

Postel’s Law

Be flexible with users, but predictable in how your system responds. 

Peak-End Rule

People often remember the high point and the ending more than everything in between.

Aesthetic-Usability Effect

People often perceive an interface that looks attractive as being easier to use, even when its actual usability hasn’t necessarily improved.

Von Restorff Effect

Make something different if you want people to notice it.

Tesler’s Law

Some complexity is unavoidable, so don’t make the user deal with all of it. 

Doherty Threshold

Fast feedback keeps users engaged. Productivity increases when a computer system responds quickly enough that users don’t have to wait unnecessarily.