Fitts's law

Fitts's law is a theorem which states that the time needed to reach a surface is proportional to the distance from that surface, and to its size. Paul Fitts stated this theorem in 1954. Today, the theroem is mostly used for the development of user interfaces.

Fitts's Law Media

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  Fitts's law: draft of target size W and distance to target D

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  Fitts task from the original experiment

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  Graph of the linear relationship of Fitts's law parameters

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  Reciprocal Tapping Task in a 2D context

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  Magic corners in Microsoft Windows

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  Example of a radial menu. The sectors have English labeling.