Figure 2.

Relationships between ideological identitification, ACC, and amygdala

(A and B) Show the means (dots) and 95% confidence intervals (bars) of respectively amygdala volume and ACC volume along the progressive-conservative social identity measure. The betas and SEs in (A and B) refer to a linear regression model with brain region as dependent variable and identity as a linear predictor.

(C) Shows average amygdala volume and social identity per political party. The size of the dot of each party corresponds to the number of participants in our sample. The horizontal lines represent the 95% confidence intervals for identity, the vertical lines represent the 95% confidence intervals for amygdala volume.