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. Author manuscript; available in PMC: 2014 Sep 11.
Published in final edited form as: Cogn Neurosci. 2011 Oct 12;3(1):52–61. doi: 10.1080/17588928.2011.613988

Figure 1.

Figure 1

The Traffic Light Task

A Subjects were instructed to move their eyes as quickly as possible from a traffic light stimulus to a target cross. Saccades made after the green light were rewarded but those executed before the green light incurred a small penalty. B Amber duration was randomly selected on each trial from a normal distribution (mean 750ms, SD 125ms). C Reward was computed by a steep discounting function of saccadic reaction time. The biggest reward was for saccades that coincided with green light onset, but such saccades would have to been programmed before the green light.