Miceli, R., Marengo, D., Molinengo, G., & Settanni, M.
Emerging problems and IRT-based operational solutions in large-scale programs of student assessment: The Italian case
The main aim of this study is to present a set of IRT-based operational solutions aimed at dealing with specific measurement issues emerging from a national-level large-scale program for the assessment of student achievement. In particular, we focused on specific problems related to measurement invariance and test dimensionality. Analyses were performed on data from the Italian 8th-grade math examinations implemented by INVALSI. Results indicated only negligible differential item functioning in the examined tests, while minor indications of multidimensionality emerged. The chosen analytical approach represents a practical and economical solution for the validation of problematic large-scale response data.Back