The results obtained from a consideration of free hand-movements of 1, 10, and 14 cm. length are:
For 14 cm. lines
for the average of nine subjects:
The mean errors,
(1) increase with speed for eyes open;
(2) do not change in error with speed-change for eyes closed;
(3) visual control reduces errors for right hand, but does not for the left;
(4) right-handed subjects alone gain from visual control.
The constant errors,
(1) decrease with speed in visual cases;