http://www.psychologicaltesting.com/iqtest.htm
http://www.gt-cybersource.org/Articl...aspx?rid=11267
The rationale for assessment conveniently coincides with the experts' recommendations regarding the best age for testing.
Generally, testing is believed to be most reliable and most predictive between the ages of six and nine years old. Although many of the modern assessments are approved to be administered to children as young as two years old, the consensus among professionals is that there is rarely a need to test before the child is ready to enter school and that testing at younger ages may not provide reliable results.
-Rudey