Figure 4.

Performance and BCI quality during progress of the whole experiment (A,C) and for one exemplary single run (B,D) for subject S1 who represents a good BCI performer compared to subject S6 as a bad example. The bad performer triggers BCI → JS switches more frequently. Performance depends on currently picked up coins and barriers, whereas the quality decreases and increases due to active quality measures and recovery rates, respectively. The start of a new run is indicated with blue vertical lines. A new run always started in JS mode, no matter in which mode the foregoing run concluded.