Literaturnachweis - Detailanzeige
Autor/in | Allison, David B. |
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Titel | When Is It Worth Measuring a Covariate in a Randomized Clinical Trial? |
Quelle | In: Journal of Consulting and Clinical Psychology, 63 (1995) 3, S.339-43 |
Sprache | englisch |
Dokumenttyp | gedruckt; Zeitschriftenaufsatz |
ISSN | 0022-006X |
Schlagwörter | Clinical Psychology; Cost Effectiveness; Higher Education; Mathematical Formulas; Research Design; Research Methodology; Sample Size; Statistics |
Abstract | In a randomized clinical trial, a researcher can increase statistical power by including a covariate (or pretest) to reduce participants; however, this raises the cost per participant. A simple closed form expression is derived that applied researchers can use to answer the cost/benefit question. (JPS) |
Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
Update | 2004/1/01 |