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Estimating Difficulty from Polytomous Categorical Data

Published online by Cambridge University Press:  01 January 2025

Javier Revuelta*
Affiliation:
Autonoma University of Madrid
*
Requests for reprints should be sent to Javier Revuelta, Department of Social Psychology and Methodology, Autonoma University of Madrid, 28049 Madrid, Spain. E-mail: javier.revuelta@uam.es

Abstract

A comprehensive analysis of difficulty for multiple-choice items requires information at different levels: the test, the items, and the alternatives. This paper introduces a new parameterization of the nominal categories model (NCM) for analyzing difficulty at these three levels. The new parameterization is referred to as the NE–NCM and is statistically equivalent to the NCM. The NE–NCM is applied to a sample of responses from a logical analysis test. The results suggest that the individuals execute a self-terminated response process that is mostly determined by working memory load.

Information

Type
Original Paper
Copyright
Copyright © 2010 The Psychometric Society

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