(3) there is constant overruling.
Individual cases suggest:
(1) fatigue-spots are apparent, especially for head-backward movements;
(2) errors do not increase with speed;
(3) the movements of the head forward are under better control.
FOOT-RECORDS
10 cm. records show that
(1) the eyes are of no assistance as to increasing accuracy but help in promoting regularity of error;
(2) a shortening of ruled lines with speed-increase is noticeable, and is probably due to the usual physiological reason;
(3) the feet are capable of less accurate motion than the hands, but show better results than the head;