Psychotherapy integration consisted of attempts to combine the two approaches, with authors such as Dollard and Miller and Alexander endeavouring to translate the language of psychoanalysis into learning theory. By 1994 integration had become a developing movement. In 1973, the controversy within psychology and psychiatry over new methods led Thoresen to develop an approach that integrated the behavioural approaches with those that were more experiential and humanistic in orientation. The approaches to integration within psychotherapy have become generally recognized, namely technical eclecticism, theoretical integration, and common factors. Theoretical integration is a synthesis of two or more theories of psychotherapy, which includes the best elements of these theories. The movement towards integration is still very much in its infancy.