title: [XS-DIF: program for analysis of Differential Item Functioning in Excel].
abstract: XS-DIF is a program for detection of Differential Item Functioning (DIF) using Item Response Theory (IRT). It calculates Lords Chi-Square, Raju's Signed Area and Unsigned Area, and Kim and Cohen's Closed-interval signed area and Closed-interval unsigned area. XS-DIF was designed to be executed in Excel 2000 and it has a capacity of analysis of up to 100 items. It is useful to support data analysis of research projects and in detection and teaching processes in DIF.
authors.affiliation: Universidad Complutense de Madrid, Spain. xavor@edu.ucm.es
authors.forename: Xavier G
authors.initials: XG
authors.lastname: Ordóñez
authors.forename: Sonia J
authors.initials: SJ
authors.lastname: Romero
mesh_terms: D006801:Humans; D008960:Models, Psychological; D011582:Psychological Theory; D011584:Psychology / Q000379:methods