title: Obstacles to identifying valid performance predictors.
authors.forename: J P
authors.initials: JP
authors.lastname: Cunnington
authors.forename: G R
authors.initials: GR
authors.lastname: Norman
mesh_terms: D002140:California; D002982:Clinical Clerkship; D002983:Clinical Competence; D015986:Confounding Factors, Epidemiologic; D015203:Reproducibility of Results; D012570:School Admission Criteria; D012577:Schools, Medical