Although psychoanalysis is usually associated with the work of Sigmund Freud, a number of psychologists have found themselves in disagreement with certain aspects of Freudian theory, and have developed their own variant forms of analytic treatment. In this country the work of Melanie Klein who became convinced of the importance of experiences in the first year of life has been particularly influential. Dr Hanna Segal , an analyst who worked closely with Mrs Klein , explains the basis of Kleinian analysis.