I Sulis, M Porcu - Journal of Classification, 2017 - Springer
A critical issue in analyzing multi-item scales is missing data treatment. Previous studies on this topic in the framework of item response theory have shown that imputation procedures …
I Sulis, M Porcu - Social Indicators Research, 2015 - Springer
This research aims to reach four main objectives by identifying plausible factors influencing Italian fifth grade pupils' achievement in mathematics and reading:(1) to assess the …
Research has a variety of difficulties, especially when involving human subjects, and one of the most prevalent is the issue of missing data. Missing data will always be present in …