(2) increase with speed to the middle and then reduce to 200 beats for eyes closed;
(3) left-handed subjects are more accurate for the left hand and can dispense with visual control;
(4) all subjects need visual control for the right hand;
(5) left-handed subjects show less error throughout for non-visual.
For the individual cases,
the mean errors
(1) show evidences of loss of control or fatigue for some speeds, and the average results are confirmed.
The constant errors show that the average deductions are confirmed.
Lines 10 cm. long:
Averages for seven subjects as regards mean errors have especial interest for l.h.e.c. records, which alone show a rise of error with speed-increase.