title: Sampling the sample.
authors.affiliation: College of Nursing, University of Rhode Island, Kingston 02881, USA. bsobrien@mail.uri.edu
authors.forename: Barbara
authors.initials: B
authors.lastname: O'Brien
authors.forename: Ginette G
authors.initials: GG
authors.lastname: Ferszt
mesh_terms: D001296:Audiovisual Aids; D003627:Data Interpretation, Statistical; D004508:Education, Nursing, Baccalaureate / Q000379:methods*; D019317:Evidence-Based Medicine / Q000193:education / Q000379:methods; D006801:Humans; D015399:Nursing Research / Q000193:education / Q000379:methods; D018794:Problem-Based Learning / Q000379:methods; D015983:Selection Bias