ion of inner life and has to
understand every factor involved from a psychological point of view: his
psychotherapy must be thoroughly applied psychology.

The day of applied psychology is only dawning. The situation is indeed
surprising. The last three or four decades have given to the world at
last a really scientific study of psychology, a study not unworthy of
being compared with that of physics or chemistry or biology. In the
center of the whole movement stood the psychological laboratory with its
equipment for the most subtle analysis and explanatory investigation of
mental phenomena. The first psychological laboratory was created in
Leipzig, Germany, in 1878. It became the parent institution for
laboratories in all countries. At present, America alone has more than
fifty psychological laboratories, many of them large institutions
equipped with precious instruments for the study of ideas and emotions,
memories and feelings, sensations and actions. Still more rapid than
this external growth of the laboratory psychology was the inner growth
of the experimental method. It began with simple experiments on
sensations and impulses, and it seemed as if it would remain impossible
to attack with the experimental scheme the higher and more complex
psychical structures. But just as in physics and chemistry the triumphal
march of the experimental method could not be stopped, one part of the
psychological field after another was conquered. Attention and memory,
association and inhibition, emotion and volition, judgment and feeling
all became subjected to the scientific scheme of experiment. And that
was all supplemented by the progress of physiological psychology,
pathological psychology, child psychology, animal psychology. In this
way the last decades created a science which of course was by principle
a continuation of the old psychology, but yet which had good reason to
designate itself as a "new" psychology.

But in this whole development, until yesterday, the curious fact
remained that it was going on without any narrow contact with practical
life; it was a science for the scientist and measured by its practical
achievements in daily life, it seemed barren and unproductive.
Psychology was studied as palaeontology and Sanscrit were studied,
without any direct relation to the life which surrounds us. And yet
after all it deals with the mental facts which have to enter into every
one of our practical deeds, if we are to con