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Browsing by Author "Mokken, Robert J."

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    A nonparameteric approach to the analysis of dichotomous item responses
    (1982) Mokken, Robert J.; Lewis, Charles
    An item response theory is discussed which is based on purely ordinal assumptions about the probabilities that people respond positively to items. It is considered as a natural generalization of both Guttman scaling and classical test theory. A distinction is drawn between construction and evaluation of a test (or scale) on the one hand and the use of a test to measure and make decisions about persons’ abilities on the other. Techniques to deal with each of these aspects are described and illustrated with examples.
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    Rejoinder to "The Mokken scale: A critical discussion."
    (1986) Mokken, Robert J.; Lewis, Charles; Sijtsma, Klaas
    The nonparametric approach to constructing and evaluating tests based on binary items proposed by Mokken has been criticized by Roskam, van den Wollenberg, and Jansen. It is contended that their arguments misrepresent the objectives of this approach, that their criticisms of the role of the H coefficient in the procedures are irrelevant or erroneous, and that they fail to distinguish the inherent requirements (and limitations) of general nonparametric models and procedures from those of parametric ones. It is concluded that Mokken’s procedures provide a useful tool for researchers in the social sciences who wish to construct and evaluate tests for measuring theoretically meaningful latent traits while avoiding the strong parametric assumptions of traditional item response theory.