Figure 6.

Neurofeedback regulation success. Overall regulation was classified “Yes” if a significant effect for one or more of the four measures were reported and “No” if no significant effect was reported. If both were reported, the overall regulation was classified “Yes/No.” Note that Kober et al. (2015, 2018) trained the regulation of HbO and HbR in different groups and found differential results for the groups. Therefore, the two studies were counted twice for the four measures. In overall regulation, the two studies were only counted once and were classified as “Yes/No”.