part of a series on psychology outline history subfields basic types[show] applied psychology[show] lists[show] psi2.svg psychology portal vte psychotherapy is the use of psychological methods, particularly when based on regular personal interaction, to help a person change behavior and overcome problems in desired ways. psychotherapy aims to improve an individual's well-being and mental health, to resolve or mitigate troublesome behaviors, beliefs, compulsions, thoughts, or emotions, and to improve relationships and social skills. certain psychotherapies are considered evidence-based for treating some diagnosed mental disorders. others have been criticized as pseudoscience