ERIC Number: EJ808339
Record Type: Journal
Publication Date: 2008
Abstractor: As Provided
Reference Count: 39
Raju's Differential Functioning of Items and Tests (DFIT)
Oshima, T. C.; Morris, S. B.
Educational Measurement: Issues and Practice, v27 n3 p43-50 Fall 2008
Nambury S. Raju (1937-2005) developed two model-based indices for differential item functioning (DIF) during his prolific career in psychometrics. Both methods, Raju's area measures (Raju, 1988) and Raju's DFIT (Raju, van der Linden, & Fleer, 1995), are based on quantifying the gap between item characteristic functions (ICFs). This approach provides an intuitive and flexible methodology for assessing DIF. The purpose of this tutorial is to explain DFIT and show how this methodology can be utilized in a variety of DIF applications.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A