At 14 inches only 14 per cent of all the cases were refused, and at 13 inches only about 7 per cent.

There was a larger percentage of refusals at 11 and 12 inches than at 13 and 14 inches, a result due to the influence of the brown, which was refused consistently when more than 10 inches away.

The fact that there were no refusals to reach for anything exposed within reaching distance (10 inches)--other attractive objects being kept away--shows two things; (1) the very fine estimation visually of the distance represented by the arm-length; and (2) the great uniformity at this age of the phenomenon of Motor Suggestion upon which this method of child study is based, and which is referred to again below.

In respect to the first point, it will be remembered that the child does not begin to reach for anything that it sees until about the fourth or sixth week; so it is evident at what a remarkably fast rate those obscure factors of size, perspective, light and shade, etc., which signify distance to the eye, become associated with arm movements of reaching.

This method, applied with proper precautions, obviates many of the difficulties of the others.