title: Portfolio-based assessments in medical education: are they valid and reliable for summative purposes?
authors.affiliation: Clinical Lecturer in Medical Education, Deparment of Medical Education, University of Sheffield, Coleridge House, Northern Gerneral Hospital, Sheffield, UK. c.roberts1@sheffield.ac.uk
authors.forename: Chris
authors.initials: C
authors.lastname: Roberts
authors.forename: David I
authors.initials: DI
authors.lastname: Newble
authors.forename: Alan J
authors.initials: AJ
authors.lastname: O'Rourke
mesh_terms: D004501:Education, Medical / Q000592:standards*; D004521:Educational Measurement; D006801:Humans; D011594:Psychometrics / Q000379:methods; D015203:Reproducibility of Results