I think there will be a lot to be learned if we can scale up the high resolution measurement methods here to map exactly how brainwaves travel when performing specific tasks.

Maybe they should recruit experienced meditators who can give accurate introspective self-reports to be compared to the measurements, then we would start to have a relatively confident map between brain physiology and psychology. (e.g. X brain pattern in Y region specifically corresponds to the Z step of reasoning when solving the problem)