On the other hand, the detailed descriptions provided by Freud for the precise conflicts and interactions among and between the Id, Super Ego, and the Ego amount more to arbitrary characterizations rather than to the precise neurological processes envisioned by Freud (Dennet 1991). That is not to deny the existence of the various urges emphasized by Freud and the factors responsible for their degree of expression in human conduct. Contemporary psychologists acknowledge the profound role played by various neurological components of human behavior as well as their general connection to specific parts of the brain, all of which contribute in complex ways to shape individual behavior. But they differ from Freudian psychology in the suggested source of the individual's response to those natural urges.

Whereas Freud considered healthy human personality develop to be functions of specific conflicts...

Nevertheless, the motivations described by Freud are substantially consistent with elements of many other theories and observations of human personality, irrespective of the different mechanics proposed for their manifestation and expression espoused by non-Freudian models of human psychology.
References

Dennet, D. (1991). Consciousness Explained. New York: Little Brown & Co.

Gerrig, R, Zimbardo, P. (2005). Psychology and Life. 17th Edition.

New York: Allyn & Bacon.

Pinker, S. (2002). The Blank Slate: The Modern Denial of Human Nature. New York: Penguin.