2Organization for Economic Co - operation and Development (OECD) (1999) Measuring student knowledge and skills:A new framework for assessment. Paris: OECD. pp9 - 10, pp43, pp47.
3Organization for Economic Co - operation and Development (OECD) (2000) Measuring student knowledge and skills:The PISA .2000 assessment of reading,mathematical and scientific literacy. Paris: OECD. pp82, pp56.
4Organization for Economic Co - operation and Development (OECD) (2001) Sample tasks from the PISA 2000 assessment of reading, mathematical and scientific literacy.Paris:OECD.pp95 - 96,pp93 - 94.
5Organization for Economic Co - operation and Development (OECD) (2001) knowledge and skills for life:First results from PISA2000. Paris: OECD. ppl08.
6Georg Rasch. Probabilistic models for some intelligence and attainment tests. Copenhagen: Institute of Educational Research, 1960.
7Stevens S S. On the theory of scales of measurement. Science, 1946, (103) :667 - 680.
8OECD. Assessing scientific, reading and mathematical literacy: A framework for PISA 2006. Paris: OECD, 2006.8.
9OECD. Learning for tomorrow' s world: First results from PISA2003. Paris- OECD, 2004.25.
10Wu M, Adams R J, Wilson M. ConQuest.Hawthom, Australia, ACER Press, 1998.