For Sigmund Freud, the human psyche is divided into the id, ego and super-ego.

Self-concept is how someone thinks or perceives himself.

Identity is composed of personal characteristics, social roles and responsibilities, and affiliations that defines a person.

Real self is who you like to be while Ideal self is who you are at the moment.

The super-ego represents the moral and ideal aspects of personality.

A pleasure seeking person is dominated by the id.

A guilt-ridden or inferior-feeling person is dominated by the super-ego.

Psychology is the study of human societies and cultures, and their development.

Congruence is the state which a person's ideal self and actual experience are consistent or very similar.