ERIC Number: EJ580814
Record Type: CIJE
Publication Date: 1998
Reference Count: 0
Uniform DIF and DIF Defined by Difference in Item Response Functions.
Hanson, Bradley A.
Journal of Educational and Behavioral Statistics, v23 n3 p244-53 Fall 1998
Presents precise definitions of uniform differential item functioning (DIF), unidirectional DIF, and parallel DIF. Shows that these three types of DIF are not equivalent, and discusses the theoretical relationships among them. Results demonstrate that cases of unidirectional and parallel DIF that have been considered uniform are not, in fact, uniform. (SLD)
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A