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A Comparison of Latent Trait and Latent Class Analyses of Likert-Type Data

Published online by Cambridge University Press:  01 January 2025

Geofferey N. Masters*
Affiliation:
University of Melbourne
*
Requests for reprints should be sent to Geofferey N. Masters, Centre for the Study of Higher Education, University of Melbourne, Parkville, Victoria, AUSTRALIA, 3052.

Abstract

This paper brings together and compares two developments in the analysis of Likert attitude scales. The first is the generalization of latent class models to ordered response categories. The second is the introduction of latent trait models with multiplicative parameter structures for the analysis of rating scales. Key similarities and differences between these two methods are described and illustrated by applying a latent trait model and a latent class model to the analysis of a set of “life satisfaction” data. The way in which the latent trait model defines a unit of measurement, takes into account the order of the response categories, and scales the latent classes, is discussed. While the latent class model provides better fit to these data, this is achieved at the cost of a logically inconsistent assignment of individuals to latent classes.

Information

Type
Original Paper
Copyright
Copyright © 1985 The Psychometric Society

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Footnotes

The author wishes to thank Clifford C. Clogg, Otis Dudley Duncan and Benjamin D. Wright for their helpful comments on an earlier version of this paper.

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