Psychological Science considered as a purely objective,
experimental branch of natural science with the theoretical goal of
predicting and controlling behavior.Introspection [reflections on
mental states] forms no essential part of its methods, nor is the
scientific value of its data dependent upon the readiness with
which they lend themselves to interpretation in terms of
consciousness.
The desire in all such work is to gain an accurate knowledge of
the adjustments [responses] and the stimulae calling them forth.
The reason for this is to learn general and particular methods by
which behavior can be controlled.If psychology would follow the
plan suggested, the educator, the physician, the jurist, and the
business man could utilize the data in a practical way, as soon as
it could be experimentally obtained.