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The Measurement of Factor Indeterminacy

Published online by Cambridge University Press:  01 January 2025

Roderick P. McDonald*
Affiliation:
The Ontario Institute for Studies in Education

Abstract

Results obtained by Guttman [1955] on the determinacy of common factors have been thought to have disturbing consequences for the common factor model. It is argued that factors must be thought of as unobservable, and uniquely defined but numerically indeterminate. It follows that Guttman's measure of indeterminacy is inconsistent with the foundations of the factor model in probability theory, and the traditional measures of factor indeterminacy used by earlier writers should be reinstated. These yield no disturbing conclusions about the model.

Information

Type
Original Paper
Copyright
Copyright © 1974 The Psychometric Society

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