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. 2010 Oct 20;30(42):14225–14234. doi: 10.1523/JNEUROSCI.2393-10.2010

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Copyright © 2010 the authors 0270-6474/10/3014225-10$15.00/0

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Figure 2. — Timing of a trial scaled in TR (1 TR = 2000 ms). The number of blank TRs between stimulus and feedback was jittered with a truncated geometric distribution with p = 0.5 (maximum 3 TRs), whereas the number of blank TRs between the feedback and the next stimulus was jittered with a truncated geometric distribution with p = 0.5 (maximum 5 TRs). When more than one blank TR was inserted between the feedback and the following stimulus (48% of the trials), a crosshair was displayed in the second half of the TR immediately preceding stimulus presentation.