The effects of excluding students from PISA tests Post author:Emil O. W. Kirkegaard Post published:6. December 2016 Post category:Differential psychology/psychometrics / Education / Math/Statistics A new R Notebook. You Might Also Like “I used improper factor analysis, and now there isnt a g factor. Spearman was wrong!” 20. May 2013 IQ can be increased by more education but can intelligence? Does it matter? 24. March 2022 Review: The One World Schoolhouse (Salman Khan) 27. December 2012