UX Laws & Principles
Research-backed UX laws, principles, and methods connected to real insights
Accot-Zhai Steering Law
### Human physiology Moving a cursor along a long, straight line is physically difficult for humans due to the physiology of our elbows and wrists. As a result, the longer the motion, the greater the chance of error.
Doherty Threshold
Productivity soars when a computer and its users interact at a pace (<400ms) that ensures that neither has to wait on the other.
Fitts' Law
The time required to move to a target area is a function of the distance to the target and the size of the target.
Simon Effect
People respond faster and more accurately when the location of a stimulus matches the location of the response, even when stimulus location is irrelevant to the task.
About UX Laws
UX Laws connect theoretical principles with real research insights. Each law is linked to supporting research findings from usability studies, helping you make evidence-based design decisions.