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A Monte Carlo Investigation of the Statistical Significance of Kruskal's Nonmetric Scaling Procedure

Published online by Cambridge University Press:  01 January 2025

David Klahr
David Klahr*
Affiliation:
University of Chicago
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Abstract

Recent advances in computer based psychometric techniques have yielded a collection of powerful tools for analyzing nonmetric data. These tools, although particularly well suited to the behavioral sciences, have several potential pitfalls. Among other things, there is no statistical test for evaluating the significance of the results. This paper provides estimates of the statistical significance of results yielded by Kruskal's nonmetric multidimensional scaling. The estimates, obtained from attempts to scale many randomly generated sets of data, reveal the relative frequency with which apparent structure is erroneously found in unstructured data. For a small number of points (i.e., six or seven) it is very likely that a good fit will be obtained in two or more dimensions when in fact the data are generated by a random process. The estimates presented here can be used as a bench mark against which to evaluate the significance of the results obtained from empirically based nonmetric multidimensional scaling.

Information

Type
Original Paper
Information
Psychometrika , Volume 34 , Issue 3 , September 1969 , pp. 319 - 330
Copyright
Copyright © 1969 The Psychometric Society

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Footnotes

*

A preliminary version of this paper was presented at the International Federation for Information Processing Congress 68 in Edinburgh, Scotland, August 5–10, 1968.

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