ABSTRACT
Sigmund Freud’s theory was the first major modern theory of personality. Many later theories were developed by modifying some aspect of Freud’s theory or by rejecting one feature and proposing a new theory that set up a dialectic with Freud’s theory. Freud was a genius, perhaps the only genius who has worked in the field of psychology. His first work on psychoanalytic theory was co-authored with Joseph Breuer. Freud’s ideas about the theory developed in his 40s, a common age for productivity in the social sciences. Freud’s psychoanalytic theory has the largest range of applicability of any psychological theory. In one of the studies supporting the theory, H. S. Zamansky first developed an experimental situation in which heterosexual and homosexual men differed. In psychoanalytic theory the concept appears as the rate of cathexis. Disturbed behavior can be described in various ways using psychoanalytic theory.
