Psychodynamics can be defined as the study of the interplay between a person's unconscious and conscious mental processes. Some synonymous terms that refer to this study are psychoanalytic theory, depth psychology, and behavioral theory. Psychoanalytic theory seeks to explain human behavior and relationships by examining the role of unconscious and conscious motivations. Depth psychology focuses on the exploration of human conscious and unconscious experiences as they relate to personal development. Behavioral theory refers to the study of human behaviors in relation to environmental stimuli and their consequences. Overall, these terms describe the study of human psychology, particularly in terms of the relationship between internal and external factors that influence behavior and emotions.