[Statlist] Reminder *Research seminar in statistics* Université de Genève / Faculté SES

[Sylvie Huber]

RESEARCH SEMINAR IN STATISTICS



Organisers :                                                                                   .

E. Cantoni - E. Ronchetti - S. Sperlich - M-P. Victoria-Feser



Friday December 6th, 2013

at 11h15

Room M 5220, Uni Mail (40, bd du Pont-d'Arve)



Carolin Strobl

Universit�t Zurich



"Detecting Differential Item Functioning in Psychological Tests with Model-Based Recursive Partitioning"

Abstract:

The main aim of educational and psychological testing is to provide a means for objective and fair comparisons between the test takers. However, in practice a phenomenon called differential item functioning (DIF) can lead to an unfair advantage or disadvantage for certain groups of test takers. A variety of statistical methods has been suggested for detecting DIF in the Rasch model, that is used increasingly in educational and psychological testing. However, most of these methods are designed for the comparison of pre-specified focal and reference groups, such as males and females, whereas the actual groups of advantaged or disadvantaged test takers may be formed by (complex interactions of) several covariates, as in the case of females up to a certain age. In this talk, a new method for DIF detection based on model-based recursive partitioning is presented that can detect groups of test takers exhibiting DIF in a data-driven way. The talk outlines the statistical methodology behind the new approach as well as its practical application by means of an illustrative example.
http://www.stat-center.unige.ch/ResSem.html

Sylvie Huber
Universit� de Gen�ve
D�partement des sciences �conomiques
Secr�taire

Bureau 5263, 5�me �tage
UNI MAIL, Bd du Pont d'Arve 40
Suisse - 1211 Gen�ve 4
T�l. : + 41 22 379 82 63
Fax : + 41 22 379 82 93
E-mail : Sylvie.Huber using unige.ch<mailto:Sylvie.Huber using unige.ch>


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