Fitts's law

Fitts' law, sometimes Fitts'sches law, was developed in 1954 by Paul Fitts.

It means that the time required to reach a target area is a function of the distance to this surface and its size. Reaching here means a motor act, such as touching a point with the hand, finger or a pen - at times Fitts '.

Today, the law is considered in the development of human- machine interfaces. It thus refers ergonomic aspects with a, for example, the virtual moving a cursor with a pointing device to a function.

Overall, it is a speed -accuracy -trade -off notice, that is, it requires more time, the further away and / or less than a goal.