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Multivariate Generalizability of General Educational Development Ratings
Noreen M. Webb and Richard J. Shavelson
Journal of Educational Measurement
Vol. 18, No. 1 (Spring, 1981), pp. 13-22
Published by: National Council on Measurement in Education
Stable URL: http://www.jstor.org/stable/1434814
Page Count: 10
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This paper shows how multivariate generalizability theory can be used to assess the reliability of measures conceived as multifaceted and multivariate. Two-facet, crossed univariate and multivariate generalizability studies of the U.S. Department of Labor's ratings of educational requirements of occupations were conducted to illustrate the procedures. Although the univariate and multivariate analyses gave similar overall results, the multivariate analysis yielded additional information on the generalizability of composites of ratings. Limitations of the present approach in obtaining composites and the need for further research on sampling variability of estimates are noted.
Journal of Educational Measurement © 1981 National Council on Measurement in Education