The CogAT is an ability test, not an IQ test. Meaning a lot of the skills on the CogAT are learned and can improve. DD had both the WISC and the CogAT and there really was no correlation except the verbal scores were similar. Her WISC non-verbal score (perceptual reasoning) was about 30 points higher than her CogAT non-verbal score. DS also had the WISC and just took the CogAT. I don't know his CogAT scores but it will be fascinating to see if there is no/little correlation with him as well.
DD took the CogAT twice (once timed and once untimed) and there wasn't even much of a correlation between those two CogAT scores. She is 2e, though, so maybe it is better with "most" kids.
