which hand do you right with (her control question)
As I said, I'm ambidextrous. However I tend to favor my Right Hand when writing much of the time.
(That probably goes back to my "School Days" in the 1940's-50's when the teachers seemed to "hate" lefties.)
I also write with my Left Hand at times.
So I would have to say Right Hand for the purpose of your experiment.
It might be of interest, I was a "switch hitter" playing baseball but I did always like batting lefty more. Certain things I do better left handed and other things I do better right handed.