Gifted Issues Discussion homepage Forums Identification, Testing & Assessment cogat scores and correlation of iq?

Just curious for those who did CogAt testing if you also know the IQ of your child or did you base everything off the CogAt scores? I don't know my sons IQ just what he scored on the test. I have been trying to find a specialist to see him for possible LD and they ask for IQ range. Thank you.

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.

I believe my son has dysgraphia which I want him seen for. I just don't know how to generalize his IQ based off his scores and from all I've read there is a correlation with IQ and dysgraphia.

Were his CogAT scores higher or lower than what you thought? If you don't think they are an accurate estimate, I would just say you don't have testing results for IQ.

I don't think that the population here represents the population at large. With that caveat, from reading many threads here, it would seem that the CogAT is an iffy indicator of what an IQ score might be. CogAT is not supposed to be an IQ test, but rather a group "learned ability" test.

In our case, we did find CogAT to correctly identify DD's greatest area of strength. DD had very high scores on the CogAT verbal (high 99%) and WISC VCI (qualified for extended norms). Her nonverbal CogAT score was her next highest, and her PRI was very high also (but lower than verbal). Her quantitative was the lowest, but it was not low. Her CogAT composite was a 99%, and her WISC FSIQ was DYS level, with a higher GAI.

So I think that the CogAT gave us a clue that she might also do well on an IQ test, but not with precision (the CogAT ceiling is lower than the WISC ceiling). But the strengths WERE accurate, and they do match what I see in real life.

My ds scored 92nd non verbal, 97th verbal, 98th quantative and 98th composite. No idea how that correlates into IQ or on a basis for intervention.

By definition, a learning disability is a gap between intellectual ability and performance in an academic area, so if he has high CogAT scores but low performance in specific areas (like writing), that would indicate that there may be a disability.

His handwriting is poor and affects his ability to show his work during math. That's why I'm thinking dysgraphia.

Cola, one thing you can look for on the CogAT - was it timed? And did any of the subtests require use of handwriting to give a response, and if so, did those subtest scores look lower than the subtest sores which required a different type of response (oral or computer).

Another thing you an do - non-scientific but gives you a bit of info - have our ds write out the alphabet (upper and lower case) and time him. Then calculate letters per minute to get a handwriting rate and google "letters per minute + grade _(ds' grade)_". If your ds' handwriting speed is lower than grade level, that's one potential concern. The other thing to look for in the handwriting sample is how he forms his letters - watch while he's writing - does he form them the way he's been taught in school? If he's starting them at different places each time, or overall just not starting at the top (when he's been instructed), that could indicate he hasn't retained memory of how to form letters. See if he skips any letters. How messy is his writing? How big? Does he have awkward spacing that changes all the time? Does he run off the paper while writing? Does he sit with odd posture, hold his pencil in an odd manner? Does he hold his arm as if i hurts when he writes.

polarbear

Cola, those are strong scores for the CogAT. Our schools consider V & Q to be most important, and they seem to almost disregard N. Still, I do not know that you will be able to estimate an IQ out of that. Does his achievement match?