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A Generalization of Takane's Algorithm for Dedicom

Published online by Cambridge University Press:  01 January 2025

Henk A. L. Kiers,
Jos M. F. ten Berge,
Yoshio Takane and
Jan de Leeuw
Henk A. L. Kiers*
Affiliation:
University of Groningen
Jos M. F. ten Berge
Affiliation:
University of Groningen
Yoshio Takane
Affiliation:
McGill University
Jan de Leeuw
Affiliation:
University of California, Los Angeles
*
Requests for reprints should be sent to Henk A. L. Kiers, Department of Psychology, Grote Markt 31/32, 9712 HV Groningen, THE NETHERLANDS.
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Abstract

An algorithm is described for fitting the DEDICOM model for the analysis of asymmetric data matrices. This algorithm generalizes an algorithm suggested by Takane in that it uses a damping parameter in the iterative process. Takane's algorithm does not always converge monotonically. Based on the generalized algorithm, a modification of Takane's algorithm is suggested such that this modified algorithm converges monotonically. It is suggested to choose as starting configurations for the algorithm those configurations that yield closed-form solutions in some special cases. Finally, a sufficient condition is described for monotonic convergence of Takane's original algorithm.

Keywords

DEDICOMleast squares fittingmajorization

Information

Type
Original Paper
Information
Psychometrika , Volume 55 , Issue 1 , March 1990, pp. 151 - 158
Copyright
Copyright © 1990 The Psychometric Society

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Footnotes

Financial Support by the Netherlands organization for scientific research (NWO) is gratefully acknowledged. The authors are obliged to Richard Harshman.

References

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