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. Author manuscript; available in PMC: 2008 Jan 1.
Published in final edited form as: Neuroimage. 2006 Oct 17;34(1):455–461. doi: 10.1016/j.neuroimage.2006.09.012

Figure 2. Behavioral results (RT).

Figure 2

a) There was a significant interaction of reward probability and time on task on mean reaction time. By late trials, subjects were faster when responding to cues associated with the 100% reward probability condition (mean =498.30, sd=206.23) relative to the 33% condition (mean=583.74, sd=270.23). The difference in mean reaction time between the 100% and 33% conditions increased two-fold from early to late trials. b) In a reversal condition at the end of the experiment, the probabilities of reward for the 33% and 100% conditions and showed a decrease in RT to the condition that was the 33% probability in the non-reversal (mean=583.74, sd=270.24) and 100% in the reversal (mean=519.89,sd=180.46).