the arc lab
Run the arc on yourself.
Learn a hidden rule, climb to the moment it clicks, distil it on the way down, then apply it cold. At the end you'll see your own rise-peak-descent curve next to the ideal. Takes about ten minutes.
This is a playable demo, not a scientific measurement. Everything runs and stays on your device, nothing is uploaded, nothing is recorded for research. The real study is a separate, supervised instrument.