Modifying Spearman's Attenuation Equation to Yield Partial Corrections for Measurement Error--With Application to Sample Size Calculations

Autor/in	Nicewander, W. Alan
Titel	Modifying Spearman's Attenuation Equation to Yield Partial Corrections for Measurement Error--With Application to Sample Size Calculations
Quelle	In: Educational and Psychological Measurement, 78 (2018) 1, S. 70-79Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0013-1644
DOI	10.1177/0013164417713571
Schlagwörter	Forschungsbericht; Error of Measurement; Correlation; Sample Size; Computation; Equations (Mathematics); Reliability; Test Theory; Psychology; Error Correction; Statistical Analysis; Models + Suchen Sie Ihr Suchwort? Messfehler; Korrelation; Equations; Mathematics; Gleichungslehre; Reliabilität; Testtheorie; Psychologie; Korrektur; Statistische Analyse; Analogiemodell
Abstract	Spearman's correction for attenuation (measurement error) corrects a correlation coefficient for measurement errors in either-or-both of two variables, and follows from the assumptions of classical test theory. Spearman's equation removes all measurement error from a correlation coefficient which translates into "increasing the reliability of either-or-both of two variables to 1.0." In this inquiry, Spearman's correction is modified to allow partial removal of measurement error from either-or-both of two variables being correlated. The practical utility of this partial correction is demonstrated in its use to explore increasing the power of statistical tests by increasing sample size versus increasing the reliability of the dependent variable for an experiment. Other applied uses are mentioned. (As Provided).
Anmerkungen	SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Begutachtung	Peer reviewed
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01