Fig. 4.

Individuals with low accumbofrontal axial diffusivity (AD) showed greater expected value sensitivity (i.e., greater probability of taking risk as expected value of reward increases) under high stress than low stress state (b = 0.7519, SE = .2710, z = 2.774, OR = 2.121, p = .00553), indicated by asterisk. While individuals with average and high accumbofrontal AD also modified risky decisions as expected value increased, their sensitivity to expected value did not differ between low stress and high stress (average AD: b = 0.4506, SE = 0.2605, z = 1.730, OR = 1.569, p = .0836; high AD: b = 0.1498, SE = 0.3018, z = .496, OR = 1.162, p = .6197).