A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf
.
A correction model for differences in the sample compositions: the degree of comparability as a function of age and schooling
2013
Large-scale Assessments in Education
Since the early days of international large-scale assessments, an overarching aim has been to use the world as an educational laboratory so countries can learn from one another and develop educational systems further. Cross-sectional comparisons across countries as well as trend studies derive from the assumption that there are comparable groups of students in the respective samples. But neither age-based nor grade-based sampling strategies can achieve balanced samples in terms of both age and
doi:10.1186/2196-0739-1-1
fatcat:c5dvcz6wl5bldmfxagyfisiyri