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The preference scaling of a group of subjects may not be homogeneous, but different groups of subjects with certain characteristics may show different preference scalings, each of which can be… (More)
Differential item functioning (DIF) can lead to an unfair advantage or disadvantage for certain subgroups in educational and psychological testing. Therefore, a variety of statistical methods has… (More)
Ziel der vorliegenden Arbeit ist die psychometrische Uberprufung der 14-Item Version des Freiburger Fragebogens zur Achtsamkeit auf der Grundlage der Rasch-Analyse. Da sowohl eine ein- (Achtsamkeit… (More)
Recursive partitioning based on psychometric models,employing the general MOB algo- rithm (from package party) to obtain Bradley-Terry trees and Rasch trees.
In the analysis of differential item functioning (DIF) using item response theory (IRT), a common metric is necessary to compare item parameters between groups of test-takers. In the Rasch model, the… (More)
Recursive partitioning techniques are established and frequently applied for exploring unknown structures in complex and possibly high-dimensional data sets. The methods can be used to detect… (More)
Measurement invariance is a fundamental assumption in item response theory models, where the relationship between a latent construct (ability) and observed item responses is of interest. Violation of… (More)