The founder of this school is the Austrian neurologist Sigmund Freud (1856-1939). The constructivist school was criticized for focusing solely on the role of consciousness in driving human behavior, And its omission of the role of the unconscious in moving behavior: therefore The Freudian school focused on the role of unconscious instincts in driving human behavior. This school contributed to the description, interpretation and structure of personality, Hypnosis methods were used, and dream analysis, And free fall in the evaluation and treatment of mental disorders. This school focused on the role of sexual instincts in early childhood . and its role in shaping the personality later.