For the average of nine subjects:
The weight reduces errors and promotes regularity in the case of both mean and constant errors, nor does it tend to cause underruling, save in the case of left-handed subjects for l.h.e.c. records. There is a gain, in general, when the visual factor is introduced.
For mean errors,
(1) right-hand curves are horizontal, while the visual records show increasing error and l.h.e.c. a reduction of errors;
(2) the right hand gives slightly better results;
(3) note that l.h.e.c. record is equally good for free or weighted movements.
For constant errors,
(1) r.h.e.o. and l.h.e.o. curve downward, while both non-visual curves slope upward;
(2) the left hand seems equally efficient, as compared with the right hand.
For individual cases,