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. 2018 Jul 25;9:2907. doi: 10.1038/s41467-018-05319-w

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — CS task and psychophysical performance of three monkeys. a The CS task. The color of the initial fixation spot (Fixation) defines the color of the eventual target. Two identical yellow spots, diametrically opposed, surrounding the central stimulus, represent potential target locations (Targets on/Go). Disappearance of the central fixation spot represents the command to move, or go signal (Go). Target and distracter are revealed (Cue) only after a variable gap of time (Gap) following the go signal. Choices are indicated via saccadic eye movement (white arrow). Reaction time (RT) is measured between the onset of the go signal and the onset of the saccadic response. Raw processing time (rPT) is measured between cue onset and saccade onset. b Percentage of correct responses as a function of rPT (tachometric curves). Error bars in b represent 95% binomial proportion confidence intervals. From left to right, data are from monkeys R (n = 19,796 trials), T (n = 11,148 trials), and G (n = 6042 trials)