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Educational and Psychological Measurement
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Validating Psychometric Assumptions within and between Several Populations

C.E. Werts

Educational Testing Service

D.A. Rock

Educational Testing Service

R.L. Linn

University of Illinois

K.G. Jöreskog

University of Uppsala

The psychometric application of Jöreskog's (Note 1) procedure for simultaneous factor analysis in several populations is illustrated. Using Scholastic Aptitude Test data from two samples, procedures are shown for checking test construction assumptions about units of measurement and error variance, within and between samples.

Educational and Psychological Measurement, Vol. 37, No. 4, 863-872 (1977)
DOI: 10.1177/001316447703700408


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