Predictive Model

28 Mar 2010 - 3:54am
5 years ago
2 replies
Jan C. Dittrich

Fitts's law: Speed and Start values for common devices


I am in search for the average start-stop and speed values for common devices like mouse and use of fingertip.

Fitts's Law: MT = a + b log2(2A/W)

the values I am in search for are a and b in the formula. Exlanations of the Law can be find everywhere, but almost all state that a and b are device-dependent and can be determined experimentally. Instead of setting up a valid experiment straight away I would like to ask if somebody already has determined the values for common pointing devices.


Thanks in advance,


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