Rejoinder to "The Mokken Scale: A Critical Discussion"

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Abstract
The nonparametric approach to constructing and evaluating tests based on binary items proposed by Mokken has been criticized by Roskam, van den Wol lenberg, and Jansen. It is contended that their argu ments 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 pro cedures from those of parametric ones. It is concluded that Mokken's procedures provide a useful tool for re searchers in the social sciences who wish to construct and evaluate tests for measuring theoretically mean ingful latent traits while avoiding the strong parametric assumptions of traditional item response theory.

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