Fig. 2

SSRT scores for Expected (ESRG) and Unexpected (URG) reward groups. [Legend] a. SSRT = stop signal reaction time, increasing condition on blue, decreasing condition on red. Left: (Expected reward shift group) Main differences were obtained on paired comparisons between the first no rewarded and the following rewarded blocks but only on the decreasing condition. Right (Unexpected reward shift group): main differences on both conditions were described between the first no rewarded and the following rewarded blocks.b. SSRT delta change ratio in percent between first block without monetary reward and 2nd, 3th and 4ths blocks with monetary reward. 2B Left: delta changes inside increasing and decreasing reward conditions on “Expected reward shift” group. * Significant difference between delta slopes comparing increasing and decreasing condition between 1st and 4th block (F(1,19) = 6.21; p = .022). 2B Right: delta changes inside increasing and decreasing reward conditions on “Unexpected of reward” group. No significant differences. c. SSRT delta change ratio in percent between Expected and Unexpected group, between Increasing and Decreasing reward conditions. *Difference was found between conditions on the “Expected reward” group on the delta change between the no monetary and the monetary rewarded blocks (F (1,19) = 5.74, (p = .027).