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Between-group differences in ventral striatal reactivity for cues predicting small and large magnitudes of monetary (green) and erotic (red) rewards. (a) Comparison of RTs for cues predictive of small and large rewards. (b) Comparison of BOLD signal response in the ventral striatum (the same ROIs as in Figure 2) for presentations of cues with different magnitudes. Error bars indicates SEM. **p<0.01; ***p<0.001. CSub, control subjects; PPU, problematic pornography users.
