Fig. 4: Results of the mediation analyses.
From: Impact of impulsivity on the relationship of the brain structures with school performance
a, b We investigated whether impulsivity (M) mediates the relationship between brain anatomy (X), particularly the gray matter volume (GMV) of regions identified by previous analysis in this study, and school performance (Y). Impulsivity was found to play a mediating role in the relationship between the GMVs of the left cerebellum a and right caudate nucleus b and school performance. c, d We further investigated whether brain anatomy (M) mediates the relationship between impulsivity (X) and school performance (Y). GMV of left cerebellum c and right caudate nucleus d, respectively, played a mediating role in the relationship between impulsivity and school performance. For each path, values including path coefficients, standard errors (SE), and 95% confidence intervals (CIs) are provided. Path coefficients are presented as “path coefficient (SE),” while 95% CIs are shown in square brackets “[lower, upper]”. Asterisks indicate significance levels: *p < 0.05, **p < 0.01, ***p < 0.001.
