Literaturnachweis - Detailanzeige
Autor/inn/en | Waterbury, Glenn Thomas; DeMars, Christine E. |
---|---|
Titel | Brief Research Report: A User Friendly Effect Size--When Normality Matters |
Quelle | In: Journal of Experimental Education, 87 (2019) 2, S.260-268 (9 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
Sprache | englisch |
Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
ISSN | 0022-0973 |
DOI | 10.1080/00220973.2018.1434757 |
Schlagwörter | Effect Size; Robustness (Statistics); Simulation; Research Methodology; Computation; Statistical Bias; Statistical Distributions |
Abstract | There is a need for effect sizes that are readily interpretable by a broad audience. One index that might fill this need is [pi], which represents the proportion of scores in one group that exceed the mean of another group. The robustness of estimates of [pi] to violations of normality had not been explored. Using simulated data, three estimates of [pi] ([pi-hat][subscript direct], r, and r[subscript robust]) were studied under varying conditions of sample size, distribution shape, and group mean difference. This study demonstrated that r and r[subscript robust] were biased estimates of [pi] when data were nonnormal. We recommend that neither be used in estimating [pi] unless data are normally distributed. (As Provided). |
Anmerkungen | Routledge. Available from: Taylor & Francis, Ltd. 530 Walnut Street Suite 850, Philadelphia, PA 19106. Tel: 800-354-1420; Tel: 215-625-8900; Fax: 215-207-0050; Web site: http://www.tandf.co.uk/journals |
Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
Update | 2020/1/01 |