Personality

Phsycology is the totality of qualities and traits, as of character or behavior, that are peculiar to a specific person.

Almost everyday we describe the personalities of the people around us. Whether we realize it or not, these daily musings on how and why people behave as they do are similar to what personality psychologists do.

Consistency - There is generally a recognizable order and regularity to behaviors. Essentially, people act in the same ways or similar ways in a variety of situations.
Psychological and physiological - Personality is a psychological construct, but research suggests that it is also influenced by biological processes and needs.
Impact behaviors and actions - Personality does not just influence how we move and respond in our environment; it also causes us to act in certain ways.

Multiple expressions - Personality is displayed in more than just behavior. It can also be seen in out thoughts, feelings, close relationships and other social interactions.