Fitts’s Law

Fitt’s Law — UX Knowledge Base Sketch #7

What Fitts’s Law states

According to Fitts’s Law — which was originally describing movement in the physical world —, the time to acquire a target is a function of the distance to and the size of the target. If you apply this to UI design, it implies that selecting a UI element can be faster, if the size of the target element is increased, or the distance is decreased.

However, there are certain limitations and other factors that you should take into account when designing a user interface, e.g. pay attention to the rule of infinite edges, and keep in mind that touch screens have different characteristics.

This is how the original experiment looked like (Source: The Information Capacity of the Human Motor System in Controlling the Amplitude of Movement)

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