Longitudinal development of frontoparietal activity during feedback learning: Contributions of age, performance, working memory and cortical thickness.

•We performed a longitudinal study on feedback learning (N=208, age 8–27 years).•We tested linear and nonlinear patterns in frontoparietal activity during learning.•DLPFC and parietal cortex showed a late-adolescent peak in activity.•SMA showed a linear increase, and ACC a linear decrease in brain activity with age.•Performance predicted DLPFC and parietal activity, thickness predicted SMA activity.