title: A methodological note concerning long-term effect of treatment.
abstract: The long-term effect of treatment is defined as the score change produced directly and indirectly by the treatment during and after the treatment interval. Various instances of combinations of short-term effects, attained during the treatment interval, and of long-term effects are presented. Designs for measuring the short-term and long-term effects are sketched, and suggestions are given for distinguishing between these effects in six representative cases. A multiple-occasion measurement of the long-term effect is recommended.
authors.affiliation: Department of Psychology, University of Oslo, Norway.
authors.forename: T
authors.initials: T
authors.lastname: Lund
mesh_terms: D005500:Follow-Up Studies; D006801:Humans; D001523:Mental Disorders / Q000523:psychology / Q000628:therapy*; D010043:Outcome and Process Assessment, Health Care / Q000379:methods*; D011613:Psychotherapy