My son's GAI places him in the HG+ range and his (invalid) FSIQ is well into the MG range. At the beginning of 4th grade, he was not identified as gifted in math by our district because of a low CogAT score. This is despite the fact that he scored at the 99th percentile on the ITBS they gave him, >99th percentile on the MAP test (he scored the same as the average 8th grader in our district), and he was working very successfully 3-4 years ahead in math at home.
I think the CogAT can be accurate, but that schools shouldn't make high stakes decisions based on CogAT scores alone.
