Figure 1.
The association between gray matter volume in the bilateral amygdalae and system justification. (a) Multislice coronal heat maps show gray matter volume differences in the bilateral amygdalae correlated with system justification (t > 3.0). Higher system justification tendencies were associated with larger gray matter volume in the bilateral amygdalae as indicated by the overlapping region between bilateral amygdala masks (in blue) and system justification statistical map (in orange). (b) Glass brain image of whole brain analysis (coronal cross-section) suggests specificity of system justification effect in regions including the bilateral amygdalae. (c) Higher system justification was positively associated with larger gray matter volume in the bilateral amygdalae. Here, amygdala volume is computed as the average of left and right amygdala volumes; adjusted for age, gender, and overall brain volume; and standardized such that 0 indicates average volume with changes in 1 standard deviation increments. Source: Nam, Jost, Kaggen, Campbell-Meiklejohn, and Van Bavel (2018; Study 2).
