But we
may go still further. The experiment refers to those sides of his mind
which make him able to foresee the danger points, and that is
decidedly the most essential factor and the one from which most can be
hoped for the safety of the public. But this does not exclude the
possibility that some other mental traits may become causes of
accidents. The man may be too daring and may like to run risks, or he
may still need discipline, or he may not be sufficiently acquainted
with the local conditions. Any such secondary factors may cause some
slight accidents with the man who shows rather fair results in the
experimental test of his foresight. Finally, we must not forget that
some men enter into such tests under a certain nervous tension and
therefore may not show so well at the very first test as their mental
equipment should allow. Hence it is decidedly desirable not to rely on
the first test, but to repeat it. If those various interferences are
taken into account, the correspondence between efficiency and the
results of the tests is fairly satisfactory. It justified me in
proposing that the experiments be continued and in regarding it as
quite possible that later tests on the basis of this principle may be
introduced at the employment of motormen.
A difficulty is presented by the valuation of the numerical results.
The mere number of omissions alone cannot be decisive, as it is clear
that no intelligent man would make any omissions if he should give an
unlimited amount of time to it; for instance, if he were to spend
fifteen minutes on those 12 cards.
Pages:
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72