Feedback in psychotherapy involves clients monitoring therapy process and progress, and on a frequent basis clients register these data into online questionnaires. These data are then fed back to the therapist, hence informing about the process and progress in therapy. This information can be shared with the client, something that may enhance the client involvement in evaluating and planning of the therapy. The same data can be used for research purpose. This randomized controlled multicenter study within Norwegian couple and family contexts will explore the effects of feedback in natural settings, and it collaborates closely with a similar American study in Chicago/Evanston, Ill.