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Heiko Drewes
Only One Fitts' Law Formula - please!
In CHI EA '10: Proceedings of the 28th of the international conference extended abstracts on Human factors in computing systems. Atlanta, GA, USA, April 10 - 15, 2010, ISBN 978-1-60558-930-5. (bib)

The HCI community uses at least four different formulas for Fitts law. Each of them is derived from Shannons information theory. This raises the question which formula is wrong and which is right. While the HCI community on the one hand gives free choice for the formula, it demands good statistical values for the evaluation on the other hand. From a scientific point of view this situation is not satisfying.