Experimental procedures and results of the behavioral experiment.

<p>(A) The trial procedure: fixation, free viewing, and reward after successful trial completion. (B) From left to right, the proportion of fixation time averaged across 2 monkeys and for each monkey. (C) From left to right, the proportion of first fixation averaged across 2 monkeys and for each monkey. Bars display mean values +/− SEM. Red asterisks indicate a significant difference between responses evoked by true- and false-colored stimuli in B and C; **<i>p</i> < 0.01, ***<i>p</i> < 0.001. The data underlying this figure are available in <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002863#pbio.3002863.s036" target="_blank">S1 Data</a>.</p> <p>(PDF)</p>