Our aim
certainly was not to review the totality of possible problems related
to economic efficiency, but merely to demonstrate the principles and
the methods of experimental economic psychology by a few
characteristic illustrations. As all the examples which we selected
were chosen only in order to make clear the characteristic point of
view of psychotechnics, it is unimportant whether the particular
results will stand the test of further experimental investigations,
or will have to be modified by new researches. What is needed to-day
is not to distribute the results so far reached as if they were parts
of a definite knowledge, but only to emphasize that the little which
has been accomplished should encourage continuous effort. To stimulate
such further work is the only purpose of this sketch.
This further work will have to be a work of cooeperation. The nature of
this problem demands a relatively large number of persons for the
experimental treatment. With most experimental researches in our
psychological laboratories, the number of the subjects experimented on
is not so important as the number of experiments made with a few
well-trained participants. But with the questions of applied
psychology the number of persons plays a much more significant role,
as the individual differences become of greatest importance. The same
problems ought therefore to be studied in various places, so that the
results may be exchanged and compared.
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