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Efficient Estimation in Image Factor Analysis

Published online by Cambridge University Press:  01 January 2025

K. G. Jöreskog*
Affiliation:
Educational Testing Service

Abstract

The image factor analytic model (IFA), as related to Guttman’s image theory, is considered as an alternative to the traditional factor analytic model (TFA). One advantage with IFA, as compared with TFA, is that more factors can be extracted without yielding a perfect fit to the observed data. Several theorems concerning the structural properties of IFA are proved and an iterative procedure for finding the maximum likelihood estimates of the parameters of the IFA-model is given. Substantial experience with this method verifies that Heywood cases never occur. Results of an artificial experiment suggest that IFA may be more factorially invariant than TFA under selection of tests from a large battery.

Information

Type
Original Paper
Copyright
Copyright © 1969 The Psychometric Society

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