ERIC Number: ED050151
Record Type: Non-Journal
Publication Date: 1971-Feb
Reference Count: N/A
Correcting Four Similar Correlational Measures for Attenuation Due to Errors of Measurement in the Dependent Variable: Eta, Epsilon, Omega, and Intraclass r.
Stanley, Julian C.; Livingston, Samuel A.
Besides the ubiquitous Pearson product-moment r, there are a number of other measures of relationship that are attenuated by errors of measurement and for which the relationship between true measures can be estimated. Among these are the correlation ratio (eta squared), Kelley's unbiased correlation ratio (epsilon squared), Hays' omega squared, and the intraclass coefficient of correlation, expressed as a ratio of variance components by Ronald Fisher. This paper shows how to correct each of these for attenuation. Such corrections permit estimates of relationships between true scores to be made when estimates of relevant reliability coefficients are available. (Author)
Publication Type: N/A
Education Level: N/A
Authoring Institution: Johns Hopkins Univ., Baltimore, MD. Center for the Study of Social Organization of Schools.