Influence of parameters.

<p><b>A</b>. Change in the distance/utility relationship induced by a decrease in vigor: ρ/ε from 50 (<i>gray</i>) to 16 (<i>black</i>). Same experiment as in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1002716#pcbi-1002716-g002" target="_blank">Fig. 2A</a>. Parameters: <i>r</i> = 1, γ = 2. <b>B</b>. Same as <b>A</b> for a decrease in the value of discount factor: γ from 4 (<i>gray</i>) to 1 (<i>black</i>). Parameters: <i>r</i> = 1, ρ/ε = 50. <b>C</b>. Change in movement duration corresponding to the results in <b>A</b>. <b>D</b>. Change in movement duration corresponding to the results in <b>B</b>. <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1002716#s2" target="_blank">Results</a> obtained with Object I.