Browsing BI Open by Author "van Oest, Rutger Daniel"

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A New Coefficient of Interrater Agreement: The Challenge of Highly Unequal Category Proportions

van Oest, Rutger Daniel (Journal article; Peer reviewed, 2018)

We derive a general structure that encompasses important coefficients of interrater agreement such as the S-coefficient, Cohen’s kappa, Scott’s pi, Fleiss’ kappa, Krippendorff’s alpha, and Gwet’s AC1. We show that these ...
Unconstrained Cholesky-based parametrization of correlation matrices

van Oest, Rutger Daniel (Journal article; Peer reviewed, 2019)

Parameter estimation is relatively complicated for models containing correlation matrices, because the elements of correlation matrices are heavily constrained. We put forward a Cholesky-based parametrization that is easy ...