This is only true for certain achievement tests. STAR testing adapts levels and gives harder questions if the child is getting questions right, so it does not mean the child was only tested on grade level.
Results that mean "an 8th grader would test this well on a 4th grade test" can be seen in grade level testing. I've never seen GEs on such tests, but my kids have never taken ITBS or that kind of test.
Mostly, I think GEs are best ignored.
Ahh...I see. I've learned something new. My kids have taken ITBS and CAT (California Achievement, not Computer Adaptive), and what I described what those GE scores mean on those tests. It's even more confusing to think that GE scores mean different things on different tests. Oy.
I agree about the ignoring.
Val