Figure 5.

The development of R2* in the putamen is moderated by overall cognitive performance. To visualize the interaction between continuous variables, fitted lines are displayed that depict the relationship between age and putamen R2* for the top 5% (high performers) and bottom 95% (low performers) of the range for overall cognitive performance. Individual points represent individual scans, with connecting lines indicating scans from the same participant. The color of the points represents the overall cognitive performance z score (higher values indicate more efficient performance).