The following graph summarizes a typical live z-score neurofeedback session, using BrainDX Live Z DLL. The progress toward the mean is clearly seen. The second graph shows the same session using raw power values, confirming that EEG power values are changing in reponse to the z-score training.
The following shows the raw EEG power changes during this session. As expected, excess slow activity decreases while low-level fast activity increases.