DIF_mst function

Exploratory test for Differential Item Functioning

Compares two parameter objects and produces a test for DIF based on equality of relative item difficulties category locations

DIF_mst(db, person_property, predicate = NULL)

Arguments

• db: an dexterMST db handle
• person_property: name of a person property defined in your dexterMST project
• predicate: logical predicate to select data to include in the analysis

Examples

## Not run:

dif = DIF_mst(db, person_property = 'test_mode')
print(dif)
plot(dif)
## End(Not run)

References

Bechger, T. M. and Maris, G (2015); A Statistical Test for Differential Item Pair Functioning. Psychometrika. Vol. 80, no. 2, 317-340.