Model of cost and probability of error in the speed-accuracy trade-off.
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Abstract
<p>Theoretical model of predicted movement time (MT) over Index of Difficulty (ID) by taking into account the effects of different magnitude of signal-dependent noise (K<sub>SDN</sub>, left vs right panels) and cost of error at the target (C<sub>E</sub>, black solid vs grey dashed lines). Panels A and B predict that C<sub>E</sub> would not affect the offset of Fitts’ linear relationship (constant η<sub>B</sub>), <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0139988#pone.0139988.e001" target="_blank">Eq 1</a>; panels C and D predict that C<sub>E</sub> would not have effects on MT, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0139988#pone.0139988.e002" target="_blank">Eq 2</a>; and in panels E and F, C<sub>E</sub> would have effects on both the slope of the relationship between MT and ID and the offset (C<sub>E</sub> x η<sub>B</sub>), <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0139988#pone.0139988.e003" target="_blank">Eq 3</a>.</p
