Using MEG 🧠, we can decode updates in evidence strength from wholebrain activity as a late component, decodability peaking around 920 ms. Mirroring the behavioural findings, high-OC participants show reduced decodability in these updates, particularly in mediofrontal regions.

In the behavioural data, we find that when we’re deciding to decide, we overweight the most recent information - we’re calling this update in evidence strength ΔES. These updates tend to nudge us to commit to a decision, but the effect is reduced along the OC spectrum across both samples.