1. Multilevel item response modelling: An approach to errors in variables regression;Adams;Journal of Educational and Behavioral Statistics,1997
2. PISA 2000 technical report,2003
3. Implementing the new design: The NAEP 1983–84 technical report. (Report No. 15-TR-20);Beaton,1987
4. Mathematics achievement in the middle school years;Beaton,1996
5. Marginal maximum likelihood estimation of item parameters. An application of the EM algorithm;Bock;Psychometrika,1981