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Admissible Values of γ in Direct Oblimin Rotation

Published online by Cambridge University Press:  01 January 2025

Robert I. Jennrich*
Affiliation:
University of California at Los Angeles
*
Requests for reprints should be sent to Robert I. Jennrich, Department of Mathematics, University of California, Los Angeles, CA 90024.

Abstract

It is shown that for nonpositive values of the parameter γ in the oblimin criterion, the criterion achieves a minimum on the manifold of all possible oblique rotations of any given full rank initial loading matrix A. For every positive value of γ, on the other hand, it is shown that there exists a full rank initial loading matrix A for which the oblimin criterion does not achieve a minimum over the manifold of all oblique rotations of A. These results help explain the sometimes divergent behavior that results from using direct oblimin algorithms with γ set to a positive value.

Type
Original Paper
Copyright
Copyright © 1979 The Psychometric Society

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Footnotes

This research was supported in part by National Institutes of Health Grant RR-3.

References

Frane, J. W. & Jennrich, R. I. BMDP4M, Factor Analysis. In Dixon, W. J. & Brown, M. B.(Eds.), BMDP biomedical computer programs, P-series. Berkeley: University of California Press. 1977, 656684.Google Scholar
Harman, H. H. Modern factor analysis, 1976, Chicago: University of Chicago Press.Google Scholar
Jennrich, R. I. & Sampson, P. F. Rotation for simple loadings. Psychometrika, 1966, 31, 313323.CrossRefGoogle ScholarPubMed