The right hand intruded regularly upon the domain of the left.
Proceeding upon the clew thus obtained, a clew which seems to suggest that the hand preference is influenced by the stimulus to the eye, I introduced hand observations into a series of experiments already mentioned above on the same child's perception of the different colours; thinking that the colour stimulus which represented the strongest inducement to the child to reach might have the same effect in determining the use of the right hand as the increased distance in the experiments already described.

This inference is proved to be correct by the results.
It should be added that in all cases in which both hands were used together, each hand was called out with evident independence of the other, both about the same time, and both carried energetically to the goal.

In many other cases in which either right or left hand is given in the results, the other hand also moved, but in a subordinate and aimless way.

There was a very marked difference between the use of both hands in some cases, and of one hand followed by, or accompanied by, the other in other cases.

It was very rare that the second hand did not thus follow or accompany the first; and this was extremely marked in the violent reaching for which the right hand was mainly used.