title: Towards a formal definition of response shift (in reply to G.W. Donaldson).
authors.affiliation: Medical Psychology, Academic Medical Centre, University of Amsterdam, The Netherlands. f.j.oort@amc.uva.nl
authors.forename: Frans J
authors.initials: FJ
authors.lastname: Oort
mesh_terms: D006304:Health Status; D006801:Humans; D015233:Models, Statistical; D009426:Netherlands; D010361:Patients / Q000523:psychology*; D011788:Quality of Life; D011795:Surveys and Questionnaires