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 stand- 
points from which the socio-historical actuality may be 
viewed. Sociology is a different science, separate and dis- 
tinct from psychology and its branch, social psychology, on 
the one hand. and from the social sciences on the other. 
i Soz., pp. 557-61.