DD had slow processing speed on the WISC IV but her GAI was 150. Her CogAT scores were pretty terrible. She did well on the verbal section, because she finished it, but the other sections were not even close to complete (because the test was timed) and she was in the average range for Quant and Non-verbal. Meanwile her perceptual reasoning index on the WISC was 147 and her math achievement testing (untimed) that the school gives was well above the 99th percentile. The teacher took these results from the CogAT and concluded that she is a student with high verbal ability who needs greater challenge in reading, but she must be weak in math and non-verbal reasoning! The WISC had showed the opposite, she was 99th percentile for both verbal and non-verbal, but the non-verbal score was the highest.
We were given a score report which stated the number of questions attempted, number correct, etc. See if you can access that. If he didn't finish the test, then you have a case for him needing to be re-tested on a different instrument (esp. if he had slow processing on the WISC).
