I was part of an experiment when I was about 10 years old.
Biofeedback to control anxiety and it certainly helped and helps.
Tracked down the most likely doctor’s name a few years ago but didn’t deep dive. So now I’m deep diving and I find one of the things he’d been doing is measuring where consciousness resides in the brain using electrodes – I remember those electrodes and I remember these questions. These numbers come from a number of patients of his globbed together statistically but I’m pretty sure I’m part of that. I’m trying to contact him to find out – Michael A Tamsey and the “Tamsey Technique” – he called the “Cartography of Consciousness”.