Figure 4.

Individual differences in an index of relative motivation covaries with neural signal during reward motivation. (A) Statistical whole-brain maps for anticipatory activation that covaried with motivational index. In order to expand our analyses to include individual differences in reward sensitivity, we introduced each participant's motivational measure (i.e., the relative motivational index, RMI) as a covariate in the across-participant analysis of our reward anticipation task. For both of our a priori regions of interest, (B) the NAcc and (C) the aINS, we found a significant relationship between RMI and both BC > Zero (blue) and BC > BM (red).