In psychology, personality can be defined as the special pattern of thoughts, feelings, and behavior that persistently influence how an individual engages with the world. It is a balance between constant qualities and flowing processes that affect the perception of oneself and reaction to life circumstances.
An example is that an individual who has a high score in agreeableness might treat others with friendliness and collaboration whereas an individual with a high score in neuroticism might be susceptible to stress and negative feelings.
Contemporary studies have been analyzing personality in terms of Five-Factor Model (openness, conscientiousness, extraversion, agreeableness and neuroticism), which has been proved to forecast significant life achievements, including health, relationship and career achievements. Personality is formed as the result of a combination of genetic, biological or environmental factors and although it is usually relatively stable, research also demonstrates that personality also may change throughout life or as a result of deliberate efforts. Knowledge of personality aids psychologists in their evaluation of individual variations, as well as, in facilitating personal development and enhancing well-being.