title: A valid step in the process: a commentary on Beckstead (2009).
authors: Center for Health Outcomes & Policy Research, University of Pennsylvania - CHOPR, 418 Curie Blvd., 3R-393, Philadelphia, PA 19104, United States.
authors: Allison
authors: A
authors: Squires
mesh_terms: D015399:Nursing Research; D011594:Psychometrics; D015203:Reproducibility of Results