caa a22 4500 606242333 CHVBK 20210128101318.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11336-014-9408-y doi (NATIONALLICENCE)springer-10.1007/s11336-014-9408-y A Statistical Test for Differential Item Pair Functioning [Elektronische Daten] [Timo Bechger, Gunter Maris] This paper presents an IRT-based statistical test for differential item functioning (DIF). The test is developed for items conforming to the Rasch (Probabilistic models for some intelligence and attainment tests, The Danish Institute of Educational Research, Copenhagen, 1960) model but we will outline its extension to more complex IRT models. Its difference from the existing procedures is that DIF is defined in terms of the relative difficulties of pairs of items and not in terms of the difficulties of individual items. The argument is that the difficulty of an item is not identified from the observations, whereas the relative difficulties are. This leads to a test that is closely related to Lord's (Applications of item response theory to practical testing problems, Erlbaum, Hillsdale, 1980) test for item DIF albeit with a different and more correct interpretation. Illustrations with real and simulated data are provided. The Psychometric Society, 2014 item response theory nationallicence differential item functioning nationallicence identifiability nationallicence Rasch model nationallicence Bechger Timo Cito, Amsterdamseweg 13, Arnhem, The Netherlands aut Maris Gunter Cito, Amsterdamseweg 13, Arnhem, The Netherlands aut Psychometrika Springer US; http://www.springer-ny.com 80/2(2015-06-01), 317-340 0033-3123 80:2<317 2015 80 11336 https://doi.org/10.1007/s11336-014-9408-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11336-014-9408-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bechger Timo Cito, Amsterdamseweg 13, Arnhem, The Netherlands aut NATIONALLICENCE 700 1- Maris Gunter Cito, Amsterdamseweg 13, Arnhem, The Netherlands aut NATIONALLICENCE 773 0- Psychometrika Springer US; http://www.springer-ny.com 80/2(2015-06-01), 317-340 0033-3123 80:2<317 2015 80 11336