gives some details of the results of the experiments in which simple objects were used, extending over a period of four months (fifth to ninth in her life). The number of experiments at each sitting varied from ten to forty; the position of the child being reversed after half of each series.
Table I.
| Date. | No. of series. |
No. of ex- periments. |
Right hand. |
Left hand. |
Both hands. | |
| 1890. | February 10th to March 15th. | 30 | 744 | 173 | 166 | 405 |
| March 14tb to April 14th | 25 | 623 | 134 | 141 | 348 | |
| April 14th to May 14th | 25 | 546 | 213 | 130 | 203 | |
| May 14th to June 19th | 16 | 274 | 57 | 131 | 86 | |
| Total | 96 | 2,187 | 577 | 568 | 1,042 | |
It is evident from Table I that no trace of preference for either hand is discernible during this period; indeed, the neutrality is as complete as if it had been arranged beforehand, or had followed the throwing of dice.
I then conceived the idea that possibly a severer distance test might affect the result and show a marked preferential response by one hand over the other. I accordingly continued to use a neutral stimulus, but placed it from twelve to fifteen inches away from the child. This resulted in very hard straining on her part, with all the signs of physical effort (explosive breathing, sounds resulting from the setting of the larynx, rush of blood to the head, seen in flushing of the face, etc.). Table II gives the results; the number in each series was very small—i. e., one to twelve (in one instance only):
Table II.
| Date. | No. of series. |
No. of trials. |
Right hand. |
Left hand. |
Both hands. |
| 1890. May 26th to June 10th | 32 | 80 | 74 | 5 | 1 |
The same cases, distributed according to distance, give us Table III.
Table III.
| 12 inches. | 13 inches. | 14 inches. | 15 inches. | |
| Right hand | 29 | 10 | 33 | 2 |
| Left hand | 5 | . . | . . | . . |
| Both hands | 1 | . . | . . | . . |
A comparison of II and III with I shows a remarkable difference—i. e., during the month ending June 15th, the child showed
