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>I have heard recently that Japan has raised its national IQ by 15 points >since 1950. In fact, this statement has surfaced during conversations for >some years! I've been trying to trace it through various databases but >haven't find the source. Does anyone out there have suggestions (it does >relate to EdTech, I'm looking at mastery learning models)? > As far as I am informed an IQ-test is a relative measure with "100" as the mean and with a "normal division of scores" (I hope that is the correct term in English). This implies that the mean IQ score will always be 100! ====================================================================== R. Bestebreurtje Faculty of Educational Science and Technology Division of Educational Instrumentation University of Twente P.O.Box 217 Phone: +31.53.893958/3611 7500 AE Enschede Fax: +31.53.356531 The Netherlands E-mail: BESTEBREURTJE@EDTE.UTWENTE.NL ======================================================================