Final answer:
The psychoanalytic theory, founded by Sigmund Freud, posits that behavior is influenced by the unconscious mind's suppressed elements, which includes repressed memories and unconscious desires.
Step-by-step explanation:
The psychoanalytic theory assumes that behavior is the result of interplay between unconscious and conscious forces. Sigmund Freud's psychoanalysis, a method and theory, posits that humans have suppressed elements within their unconscious mind which influence their conscious behavior. These elements include repressed memories and unconscious desires, which can trigger responses such as verbal slips and dreams.
Freud suggested that personality develops from the conflict between biological aggressive and pleasure-seeking drives, and our internalized social control over these drives, balanced by the id, ego, and superego. Psychoanalytic theory was the dominant theory of personality throughout the first half of the 20th century, although it has since been critiqued and developed by others, including neo-Freudians and social-cognitive theorists like Skinner and Bandura.