Fig. 4.

(A) Ventrolateral (blue) and dorsolateral (red) portions of the prefrontal mask overlaid on a representative subject’s normalized anatomical image. (B) Plots of prefrontal laterality scores (low demand − fixation) by age group (young: 20–39, middle-aged: 40–59, old: 60–89), *p < .05 for Tukey’s HSD. (C) Moderation effect of age group on the association between prefrontal lateralization (low demand − fixation) and fluid ability. Left asterisks indicate significant simple slopes and right asterisks indicate significant slope differences.