title: Measurement, or how do we know what we know? Topic one: validity.
authors: School of Social Work, University of Pittsburgh, PA, USA. greenocg@msx.upmc.edu
authors: Catherine
authors: C
authors: Greeno
mesh_terms: D005196:Family Therapy; D006801:Humans; D011361:Professional Competence; D015203:Reproducibility of Results; D012106:Research / Q000592:standards*