@article{ref1,
title="Is Fitts' law continuous in discrete aiming?",
journal="PLoS one",
year="2012",
author="Sleimen-Malkoun, Rita and Temprado, Jean-Jacques and Huys, Raoul and Jirsa, Viktor and Berton, Eric",
volume="7",
number="7",
pages="e41190-e41190",
abstract="The lawful continuous linear relation between movement time and task difficulty (i.e., index of difficulty; ID) in a goal-directed rapid aiming task (Fitts' law) has been recently challenged in reciprocal performance. Specifically, a discontinuity was observed at critical ID and was attributed to a transition between two distinct dynamic regimes that occurs with increasing difficulty. In the present paper, we show that such a discontinuity is also present in discrete aiming when ID is manipulated via target width (experiment 1) but not via target distance (experiment 2). Fitts' law's discontinuity appears, therefore, to be a suitable indicator of the underlying functional adaptations of the neuro-muscular-skeletal system to task properties/requirements, independently of reciprocal or discrete nature of the task. These findings open new perspectives to the study of dynamic regimes involved in discrete aiming and sensori-motor mechanisms underlying the speed-accuracy trade-off.<p /> <p>Language: en</p>",
language="en",
issn="1932-6203",
doi="10.1371/journal.pone.0041190",
url="http://dx.doi.org/10.1371/journal.pone.0041190"
}