title: Research instruments: assessing validity.
authors.affiliation: Johns Hopkins Hospital, Baltimore, Maryland.
authors.forename: K B
authors.initials: KB
authors.lastname: Haller
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009034:Mother-Child Relations; D009730:Nursing Assessment; D015399:Nursing Research / Q000295:instrumentation*; D011247:Pregnancy; D015203:Reproducibility of Results