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A Beta Unfolding Model for Continuous Bounded Responses

Published online by Cambridge University Press:  01 January 2025

Yvonnick Noel*
Affiliation:
University of Brittany, Rennes 2
*
Requests for reprints should be sent to Yvonnick Noel, University of Brittany Rennes 2, Department of Psychology, Place du Recteur Henri Le Moal, CS 24307, 35043 Rennes Cedex, France. E-mail: yvonnick.noel@uhb.fr

Abstract

An unfolding model for continuous bounded responses is proposed, derived both from a hypothetical interpolation response mechanism and from the hypothesis of two opposite sources of item refusal being collapsed. These two sources of refusal are made explicit in a three-component Dirichlet response model and then collapsed to obtain a (two-component) beta response model. The two natural parameters of the beta are interpreted as acceptance and refusal parameters and expressed as functions of person-item distances on a latent continuum. The potentially bimodal shape of the beta is exploited to model chaotic response choices among ambivalent subjects.

Information

Type
Original Paper
Copyright
Copyright © 2013 The Psychometric Society

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