54 THE SOCIAL THEORY OF GEORG SIMMEL

gy, social psychology is related to it in the same way as
physiological psychology. The latter investigates the way
in which the psychic process is determined by its relation
to the body, the former the way in which it is determined
by its relations to other minds.!
Social psychology deals in the last instance with the
same problem as psychology, namely, the form and the
laws of the psychological processes in the individual mind.
The distinction originally pointed out between sociology
and psychology therefore also holds good for sociology and
social psychology.
Thus the difference between psychology, sociology, and
the social sciences rests on the distinction between three
categories of cognition and results from the different standpoints
 from which the socio-historical actuality may be
viewed. Sociology is a different science, separate and distinct
 from psychology and its branch, social psychology, on
the one hand. and from the social sciences on the other.

i Soz., pp. 557-61.