Inhibited participants respond more quickly to novel compared to familiar faces. Fitted time courses for left and right amygdala by temperament group (inhibited/uninhibited) and face type (novel/familiar) illustrate differences in temporal dynamics. Inhibited participants had a faster amygdala response to novel relative to familiar faces in the left and right amygdala (onset marked by arrows). The duration of the amygdala response (marked by horizontal lines) to both novel and familiar faces was longer in the inhibited group. Peak response (indicated by x) failed to differ significantly between groups.