Bauhaus-Universität Weimar

32 
Walter IV. Davis. 
and marked the hole in the paper with a figure r. The lunge was im¬ 
mediately repeated until a record of ten thrusts was obtained. The paper 
was then removed and a fresh one placed in the target. Any important 
observations were also noted down. After five minutes the experiment 
was repeated with the left hand. 
The subject was practiced for ten days in thrusting with the right hand. 
Ten thrusts were allowed for each daily practice. At the end of the 
practice period, the initial test was repeated to compare gains in the right 
and left arms. Notes were also taken in respect to improvement in form 
of lunging. The tests were all taken about 3 P. M., and for each sub¬ 
ject all the conditions were kept as nearly as possible the same. 
Results. 
The figures tabulated in Table XIV. are distances in mm. from the 
center of the target and are the averages for ten thrusts. Subjects L. and N. 
Table XIV. . 
Increase in accuracy of lunging. 
Initial. 
Final. 
Gain 
Relative 
gain. 
Age. 
R 
L 
R 
Z 
R 
Z 
R 
Z 
I. 
26 
21.8 
46.0 
16.8 
34-5 
S-o 
11.s 
0.22 
0.25 
L. 
17 
36.2 
39-9 
25-4 
27.2 
10.8 
12.7 
0.29 
0.30 
M. 
17 
49.8 
72.8 
25-3 
44.4 
24-5 
28.4 
0.49 
0-39 
N. 
22 
56.2 
50.4 
25.7 
35-4 
30.5 
15.0 
0-54 
0.29 
0. 
18 
80.2 
86.5 
25.5 
32-7 
54-7 
53-8 
0.63 
0.62 
R. 
18 
59-2 
47-9 
27-5 
44-9 
31-8 
3-o 
o-53 
0.06 
Average 
'9'A 
50-5 
57-2 
24-3 
36-5 
26.2 
20; 7 
0.51 
0.36 
are practically ambidextrous, and in right and left initial tests they give 
average results not very widely separated. R. shows greater accuracy 
with the left than with the right although he is right-handed. In the 
final tests the right hand is more accurate in all cases. In three cases 
the left has made the greater gain in millimeters ; in the other three, the 
right. Four subjects made greater relative gains with the right arm ; 
two, with the left arm. The final averages show that the right arm is the 
more accurate. In the initial tests the average difference between right 
and left is 6.7mm. In the final tests the difference is i2.2mm. Hence 
the right has made the greater average gain, the difference being 5.5"”” 
in favor of the right. 
Table XV. gives the probable error, expressed in millimeters and also 
in per cent, of subjects O. and I. The point to be noted especially is
        

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