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[XS-DIF: program for analysis of Differential Item Functioning in Excel].
Xavier G Ordóñez1, Sonia J Romero
1Universidad Complutense de Madrid, Spain. xavor@edu.ucm.es
Psicothema
|February 14, 2007
Summary
XS-DIF is a software tool for detecting Differential Item Functioning (DIF) using Item Response Theory (IRT). It supports data analysis in research and educational settings for DIF detection.
Area of Science:
- Psychometrics
- Educational Measurement
- Statistical Software
Context:
- Differential Item Functioning (DIF) analysis is crucial for ensuring fairness in educational and psychological assessments.
- Existing software may have limitations in terms of accessibility or analytical scope.
- Item Response Theory (IRT) provides a robust framework for understanding item and person characteristics.
Purpose:
- To introduce XS-DIF, a software program designed for the detection of Differential Item Functioning (DIF).
- To provide researchers and educators with a tool that implements multiple established DIF detection methods.
- To facilitate the analysis of up to 100 items within a user-friendly Excel environment.
Summary:
- XS-DIF calculates DIF using Item Response Theory (IRT), employing methods such as Lord's Chi-Square, Raju's Area, and Kim & Cohen's Area.
- The program is designed for execution in Excel 2000, offering a capacity for analyzing up to 100 items.
- It integrates various statistical measures for DIF detection, enhancing the analytical capabilities for test developers and researchers.
Impact:
- Supports data analysis in research projects by providing DIF detection capabilities.
- Aids in the detection and teaching processes related to Differential Item Functioning.
- Enhances the psychometric evaluation of assessment instruments through accessible DIF analysis.
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