Introduction | Part I: permimp-tutorial | A. The permimp-function | A.1. New Conditional Permutation Importance | A.2. Different results? | A.3. Backward Compatible with party when: asParty = TRUE | A.4. Different Output: VarImp-object | A.5. Unconditional Permutation Importance: permimp = varimp | B. Methods for VarImp-objects | B.1. plot | Additionally you can: | Although we would advise against this in most situations, you can also: | B.2. Other VarImp-methods | C. permimp applied to randomForest-objects | Part II: New Conditional Permutation Implementation | A. Recapitulation: Conditional Permutation Importance. | B. Original Implementation (party::varimp) | Some issues | C. New Implementation (permimp). | Important implications | D. How to Use the Threshold. | References

DIF detection using the score-based test framework | Overview of the method | Installation | Data preparation | Fitting the IRT model using either the mirt or multipleGroup function | Detecting DIF by using scDIFtest | DIF by gender | Interpreting the results | DIF by age | DIF by spon | Conclusion | References