Fitts' law is a model of human psychomotor behavior developed in 1954 for rapid, aimed movements, where one hand rests at a specific start position and then moves to rest within a target area. The law has guided user interface designs and has been used to predict performance of operators using complex systems such as assembly lines. This demo shows an empirical test of Fitt's Law. The sample script is available for download at http://www.millisecond.com/samples/fittslaw/fittslaw.exp.
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