FTA:

They found that the ability to introspect on memories continuously improves into adolescence. By analyzing changes in individual children over time, they could show that decreases in thickness in the insular cortex and increases in thickness in the ventromedial cortex predicted improvements in metamemory over time.

“These regions are important for our capacity to detect errors, reflect, and regulate our behaviors, and their thickness changes at different rates. We showed that their unique pattern of change is important for introspection and memory improvements during a period of tremendous learning opportunities,” Ghetti said.