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One Fitts’ Law, Two Metrics

Julien Gori 1, 2 Olivier Rioul 3, 4 Yves Guiard 5, 1 Michel Beaudouin-Lafon 6
3 COMNUM - Communications Numériques
LTCI - Laboratoire Traitement et Communication de l'Information
5 HCC - LRI - Human-Centered Computing (LRI)
LRI - Laboratoire de Recherche en Informatique
6 EX-SITU - Extreme Interaction
LRI - Laboratoire de Recherche en Informatique, Inria Saclay - Ile de France
Abstract : Movement time in Fitts’ law is usually considered through the ambiguous notion of the average of minimum movement times. In this paper, we argue that using two distinct metrics, one relating to minimum time and the other relating to average time can be advantageous. Both metrics have a lot of support from theoretical and empirical perspectives. We also give two examples, one in a controlled experiment and the other in a field study of pointing, where making the minimum versus average distinction is fruitful.
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Julien Gori, Olivier Rioul, Yves Guiard, Michel Beaudouin-Lafon. One Fitts’ Law, Two Metrics. 16th IFIP Conference on Human-Computer Interaction (INTERACT), Sep 2017, Bombay, India. pp.525-533, ⟨10.1007/978-3-319-67687-6_36⟩. ⟨hal-01717202⟩

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