Gifted Issues Discussion homepage Forums Identification, Testing & Assessment Cogat percentiles

I think the CogAT is a standard deviation of 16. I remember checking into this because the WISC standard scores/percentiles didn't match up with the CogAT standard scores/percentiles. So if a kid gets 99th percentile on the CogAT, it would be a higher standard score than they would have with the same percentile on the WISC. Our school district required a CogAT score of 139 or something, but we were using outside WISC scores and it's harder to get that on the WISC....they are not exactly comparable. A 139 on the CogAT was like a 136 or 137 on the WISC.