title: A beta unfolding model for continuous bounded responses.
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.
authors: Department of Psychology, University of Brittany Rennes 2, Place du Recteur Henri Le Moal, CS 24307, 35043, Rennes Cedex, France, yvonnick.noel@uhb.fr.
authors: Yvonnick
authors: Y
authors: Noel
mesh_terms: D006801:Humans; D015233:Models, Statistical; D011594:Psychometrics / Q000379:methods*; D013223:Statistics as Topic / Q000379:methods*