3 papers
stat.ME2017
Tree-Structured Modelling of Varying Coefficients
Moritz Berger, Gerhard Tutz, Matthias Schmid
The varying-coefficient model is a strong tool for the modelling of interactions in generalized regression. It is easy to apply if both the variables that are modified as well as t…
stat.ME2015
Tree-Structured Modelling of Categorical Predictors in Regression
Gerhard Tutz, Moritz Berger
Generalized linear and additive models are very efficient regression tools but the selection of relevant terms becomes difficult if higher order interactions are needed. In contras…
stat.ME2015
Item focussed Trees for the Identification of Items in Differential Item Functioning
Gerhard Tutz, Moritz Berger
A new method for the identification of differential item functioning (DIF) by using recursive partitioning techniques is proposed. We assume an extension of the Rasch model that al…