Thanks John., I had read that ,also
I just took the tap test on the computer (left then right) Since taking Rhodiola rosea...my hands scored very close together (both near 28) Usually my right hand was much faster. I had noticed my typing on the keyboard was faster / having less mistakes to fix this week... after reading the graph report on Stelevo post, and the site was included there for the test .....I tried it for myself. (Probably would have been faster tapping, but my room is very cold. may try again later in the day.)