Assumes behaviour is affected by desire to self-actualise (nature) & our experience can provide barriers to this through conditions of worth and varying experience of conditional positive regard (nurture)
Assumes behaviour is driven by unconscious forces, eg id/ego/superego (nature) but our coping mechanisms such as defence mechanisms arise from experience (nurture)
Utilises unconditional positive regard to help clients solve their problems, overcome conditions of worth and enable their potential for self actualisation