Hostname: page-component-74656f9884-c52kr Total loading time: 0 Render date: 2026-11-08T11:14:03.049Z Has data issue: false hasContentIssue false

Tail-Measurability in Monotone Latent Variable Models

Published online by Cambridge University Press:  01 January 2025

Jules L. Ellis*
Affiliation:
University of Nijmegen
Brian W. Junker
Affiliation:
Carnegie Mellon University
*
Requests for reprints should be send to Jules L. Ellis, Department of Mathematical Psychology, University of Nijmegen, P.O. Box 9104, 6500 HE Nijmegen, THE NETHERLANDS.

Abstract

We consider latent variable models for an infinite sequence (or universe) of manifest (observable) variables that may be discrete, continuous or some combination of these. The main theorem is a general characterization by empirical conditions of when it is possible to construct latent variable models that satisfy unidimensionality, monotonicity, conditional independence, and tail-measurability. Tail-measurability means that the latent variable can be estimated consistently from the sequence of manifest variables even though an arbitrary finite subsequence has been removed. The characterizing, necessary and sufficient, conditions that the manifest variables must satisfy for these models are conditional association and vanishing conditional dependence (as one conditions upon successively more other manifest variables). Our main theorem considerably generalizes and sharpens earlier results of Ellis and van den Wollenberg (1993), Holland and Rosenbaum (1986), and Junker (1993). It is also related to the work of Stout (1990).

The main theorem is preceded by many results for latent variable models in general—not necessarily unidimensional and monotone. They pertain to the uniqueness of latent variables and are connected with the conditional independence theorem of Suppes and Zanotti (1981). We discuss new definitions of the concepts of “true-score” and “subpopulation,” which generalize these notions from the “stochastic subject,” “random sampling,” and “domain sampling” formulations of latent variable models (e.g., Holland, 1990; Lord & Novick, 1968). These definitions do not require the a priori specification of a latent variable model.

Information

Type
Original Paper
Copyright
Copyright © 1997 The Psychometric Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable