We considered associations between cognitive tests and brain IDPs, including potential age interactions, in greater detail. Sex, head motion, and head size were regressed out of all data before computing correlations (see Online Methods). Figure 6b shows Bonferroni-significant (Puncorrected<1.8x10-8) associations with brain IDPs, both with and without adjusting for age. The task-fMRI vs. Fluid Intelligence associations are unchanged by adjusting for age, whereas all other cognition-IDP correlations are approximately doubled, being significantly stronger (Pcorrected<0.005) without age adjustment.
