I find that hoagies chart very helpful too.

Notice that according to that chart, a WISC-IV FSIQ of 145 is HG but if it moves up 7 points then it is the PG range. A bad breakfast on test day could easily knock 7 points off a child's score, but obviously a good cup of yogurt does not make any child PG.

For me personally the most important distinction is between MG and HG. HG is the range where gifted issues start working their dark magic. My informal chart would go:

MG = Excels in school. Honors.
HG = Struggles in school. Bored in honors.
EG = Refuses to go to school.
PG = Already graduated. Fighting to get in to local university before age 15.

Last edited by Pru; 09/08/11 12:45 PM. Reason: typo