Depth Psychology is distinguished from other forms of psychology because it foregrounds the importance of the Unconscious as a major influence on human reality. Other forms of psychology, such as behavioral psychology or social psychology, focus on what can be directly known or observed: these schools take self-assessments at face value. Depth Psychology presupposes that true knowledge requires a process of working with different kinds of psychic phenomena (including dreams and inexplicably physical symptoms) that suggest repressed or otherwise unknown psychological content. Jungian approaches to Depth Psychology are unique in emphasizing the role of archetypes as cross-cultural patterns in the collective Unconscious that provide a universal mirror for common human problems and possibilities in life.