(2) visual control is a 10% gain for right hand and 40 to 50% for the left, so right-handedness is prominent for the eyes-closed series;
(3) the constant-error curve for r.h.e.c. rises, but all others show reduction of error as rate increases;
(4) visual-control gains are not over 5%.
The individual curves show,
for mean errors,
(1) marked-fatigue points for l.h.e.o;
(2) r.h.e.o. curve is horizontal, but all others rise;
(3) l.h.e.o. curve is about the same as r.h.e.o., but there is more loss for non-visual series with left hand.
For constant errors,
(1) r.h.e.c. curve rises, but all others are horizontal;