Strength is that influenced the development of alternatives ways to successfully treat metal illness.A researcher has a large-scale review of psychoanalysis produced significant improvements in symptoms that were maintained in years after treatment.TMB due to Freud’s development of psychoanalysis was a way to solve abnormalities as it encourages patients to talk about their issues and bringing unconscious thoughts into the conscious and this gave a different way of treating disorder and led to development of CBT and conselling. Therefore it is useful.