A Beta Unfolding Model for Continuous Bounded Responses

Yvonnick Noel ()

Psychometrika, 2014, vol. 79, issue 4, 647-674

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. Copyright The Psychometric Society 2014

Keywords: item response theory; unfolding analysis; beta distribution; continuous bounded responses; bimodality (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1007/s11336-013-9361-1

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